1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2695a7271f787a186657ff8c97d18158ddd84ac7823e7946155f243af923b6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7ed250a-c4a3-4be6-9f3d-fe943b92d27e.json and https://artists.proofprofile.net/proofs/artist/c7ed250a-c4a3-4be6-9f3d-fe943b92d27e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a770083fc5f69faa671455121e917dc3a7eb73b233159571dfd7968af4b1be7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7625017f1a3b5745754651f79958a8efab54167b59c3a4c0599aab50bad156ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28b7220f2f936c5b0920f6c90cc284c61e7f10c96cd2d87288d66565ee4d63. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848fe481be982ac7974d086e5a67b94158c702a29b890ec0211d03607e0e073b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79342b6e503235b88d571631f171820a1e6158673a89875cbd92aed07668d2cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96f59dbc2e4eea8d39200a7aec9a09a4b29d320ee53495db45130675e8537a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd267b09f5365e8a8da1e08e83ad24ae7848abf5e87f966807d986ac66596a5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77903990efd63ec1b2b9ff501b4958635d32ca5dea99226bf29851cc776ba070. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e1cb7a77b4ea4e6bf502b4a656e0ea1e587e4d9dff0d8f9944d8ec7ee2219b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61800165.
Freedom Is Not Negotiable - Symphonic Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93e7eadd1407dc97d14405bfd9a4bbe8e748f86c6c59e60dfb90509a4ae58b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7dadcea0e732534d361aebee435f6cd684a66d2f81110fdee8727af40bad5b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3882a62273359d9d3e1d04dc63a0bcbb72053615164e5bde2295e6ffff8d2776. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUJ61900149.
Happy Birthday (Heavy Metal Version) [Bonus Track]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91cd1633007bad24fa3d8a7a3d5133d7f1863b868041f0d124caf1fdd7e0e68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1193865.
All I Want for Christmas Is You (Heavy Metal Version)
Little Drummer Boy (Symphonic Metal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe78e88f74c426c4ac8dd4a5e83f90961d02cbbbff5427b11c56995342f2f5a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R1918169.
Joy to the World (Symphonic Heavy Metal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42061ca0fa93c415fc3c77f9922630983ac5cfb82d68b4ef3fefdb4392b58edb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1893343.
Santa Claus Is Coming to Town (Symphonic Heavy Metal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea40d675e92940988cbd1d9aded3f9be4aec57bf1085d033d745effb54939dbd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1743043.
Thunderstruck (Symphonic Heavy Metal Version)
Jingle Bells (Heavy Metal Version) [feat. Minniva]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bfb416b258a28953e9a5a386aaf617a10bfc55b1f075ce0e51740ab311ee9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:34:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB5EA1604831.
Für Elise (For Elise) [Symphonic Metal Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87d0197a90dfa74a8e2139b7fbb6c88853fe7976abfbb3373ffb6171321d32f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1563077.
Carol of the Bells (Symphonic Heavy Metal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff3a47aa81ed44fcacaca220ec8ac156d678e1c4cac5bc5c3640c39556a84c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1431442.
Rudolph the Red Nosed Reindeer (Heavy Metal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f2ce502e868067506b2b288d914faa3df5297dff1915c20f5f98dd1236f908. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1414699.
We Wish You a Merry Christmas (Heavy Metal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26787737a837a0ac55497fd2c70b6dc1b11165615bb7e6ff3eee90eabc005c9f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCWZ1804455.