Clone the project, then:
cd merkle-album
mkdir input-flac
<copy flacs into input-flac>
node flac.js
<stripped flac0s will be in stripped-flac>
<finalized flacs will be in flac>
<other selected export formats will be in their dirs (mp3, etc)>
All metadata blocks are removed (via --remove-all --dont-use-padding) (the mandatory STREAMINFO block remains untouched).
The file's modtime is set to the unix epoch, Jan 1 1970.
This 'stripped' .flac0 (deterministic flac) file is then hashed with sha3d (256 bits). This is the 'Song Hash'.
The song files are added to the merkle tree, in track order (1-n), as their sha3d hashes.
The album art also must be added and hashed as a file, at position 0. It must be a Lossless 24bit/px PNG, of dimensions 2850px X 2850px (the standard size of a CD cover jewel case insert at 600dpi - archival print). Its tIME chunk must be set to the unix epoch, and there must be no sPLT, iTXt, tEXt, or zTXt chunks.
The merkle root is then computed. This is the 'Album Hash'.
As an artist, you should publish the album merkle root before you publish the album. This should be done in a permanent and public way - best done as an OP_RETURN transaction on Bitcoin, with an address you've also published. This can be used to prove that you are the original creator of the original files.
make-flac0 <input-flac>
make-final-flac <input-flac> (<metadata-yaml-file>)
validate-song <input-flac> <hash> (<hashtype>='sha3d')
Song
Album
Song Hash
Album Hash
Hash
Original FLAC
Stripped FLAC
Final FLAC