1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371bfcc72832c4d88728797a7f0d1694196be0360a4e91b9a3d98854b7a2e325. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d28b680-58d1-454a-ae49-ed714f4342ff.json and https://artists.proofprofile.net/proofs/artist/6d28b680-58d1-454a-ae49-ed714f4342ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x0afa7ffacb55f9a3dd85e055a48ca6871e90a3cdd53ce3ce151f0d3d1245877b","isrc":"USAR17200009","name":"The Letter","registered_at":"2026-06-01T07:37:42Z","spotify_id":"6RJK553YhstRzyKA4mug09","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afa7ffacb55f9a3dd85e055a48ca6871e90a3cdd53ce3ce151f0d3d1245877b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6RJK553YhstRzyKA4mug09.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6RJK553YhstRzyKA4mug09.
I Met Her In Church - Mono Single Version
Sweet Cream Ladies, Forward March - Single Version
Neon Rainbow (Featured In The Talk Talk Advert)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ca1c853dbc685c7b76d0a8714a41a8d1ac42294b3d5e4180f4414ba34969a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4I8ushmzwXcmxEgPVrgThl.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4I8ushmzwXcmxEgPVrgThl.
Quentin Tarantino's Once Upon a Time in Hollywood Original Motion Picture Soundtrack
{"copyright_id":"0x7f098f63d67489862af248875a1cf5cce406aee22b6389755716451d360f149f","isrc":"USAR10201786","name":"Choo Choo Train - Mono Single Version","registered_at":"2026-06-06T21:41:35Z","spotify_id":"6goPukKEL71RzfbSuNdU8j","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f098f63d67489862af248875a1cf5cce406aee22b6389755716451d360f149f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6goPukKEL71RzfbSuNdU8j.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6goPukKEL71RzfbSuNdU8j.
The Vietnam War - A Film By Ken Burns & Lynn Novick (The Soundtrack)
{"copyright_id":"0x97acab80d79fcb78cb4e37d1f7862d94d338fa406f4545581ff2ebf5d16a9421","isrc":"USAR10201773","name":"The Letter - Mono / Single Version","registered_at":"2026-06-18T13:21:30Z","spotify_id":"1oTGswtkG3jsIGH4hsT5s9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97acab80d79fcb78cb4e37d1f7862d94d338fa406f4545581ff2ebf5d16a9421. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1oTGswtkG3jsIGH4hsT5s9.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1oTGswtkG3jsIGH4hsT5s9.
The Greatest Hits of Rock 'n' Roll, Vol. 5
Bad Times At The El Royale (Original Motion Picture Soundtrack)
{"copyright_id":"0xbe8291933e62330ae8f2fa5618cf77db9bef632d2b0d97e214a7e2fa7b74bd9f","isrc":"QM4TX1839279","name":"Cry Like a Baby","registered_at":"2026-06-24T09:24:49Z","spotify_id":"4tcoeewYXMBEqqNXqsMhsR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8291933e62330ae8f2fa5618cf77db9bef632d2b0d97e214a7e2fa7b74bd9f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4tcoeewYXMBEqqNXqsMhsR.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4tcoeewYXMBEqqNXqsMhsR.
Heartbeats - 100 Romantic Sounds from the 60's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26bc2e5ebe234f77c2347d33621bfc5fd72bd0707a7e5f580f21d9443e674ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6IbIuXKYiNTg91W5mEIA5I.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6IbIuXKYiNTg91W5mEIA5I.
A Night On The Town - 18 Timeless Club Anthems
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ca1c853dbc685c7b76d0a8714a41a8d1ac42294b3d5e4180f4414ba34969a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1n9LfDHToAQ16358P1UMq3.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1n9LfDHToAQ16358P1UMq3.
{"copyright_id":"0x97acab80d79fcb78cb4e37d1f7862d94d338fa406f4545581ff2ebf5d16a9421","isrc":"USAR10201773","name":"The Letter - Mono Single Version","registered_at":"2026-06-18T13:21:30Z","spotify_id":"3XkbY0sOYk9TfFlNp4jiY0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97acab80d79fcb78cb4e37d1f7862d94d338fa406f4545581ff2ebf5d16a9421. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3XkbY0sOYk9TfFlNp4jiY0.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3XkbY0sOYk9TfFlNp4jiY0.