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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac26b010ec8d910830b0ec4f24af793cb594746bf795c8d77bcea03a3798d9a1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bf68d05-631d-41d5-a54e-f89a4a95b690.json and https://artists.proofprofile.net/proofs/artist/1bf68d05-631d-41d5-a54e-f89a4a95b690.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c75df8bcdc484f31206a5bc430e2fc8410947ac8763bc9f81151374581beb5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542552942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8920cc3af118e1dbc46fb0d9f73b144937e2b522fa647dc7c224a862065a6fd8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2500807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1c02d525e4f8bd7c6a3e9fdfa8ead84b1b1294e86757b5885121496e902a37. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812540130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff278f44161468fbc92969296cb2332c5e4a37794349f4f86323c8fd927d42c0. 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/NLRD52424704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a72ac9437086d78a12de1a7f9d5c9d2cb86fc2e9eb9c27b46395b2e7afe9800. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL2J92505673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8c5a22dab551856b9ebf518a0464966c3474ee67688dabfed058abccb1d65. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLYK92500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aa101212a0f19d569fa352dc923c560a2c4ec732520388974ac672c9df906c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX5MX2554932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa348d6427ca95d60f4f8960b29dfcd3c93cfe89bb91a14fee6e3d43e2f63fc5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX5MX2532600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2534b5a6d85c392f0d773c3b72ed3d3548328a498abf6fc6dc8d2623ca493. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLV62418727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e8ebc7986f84a988d0944c3603691301bc45cb3f88071ed08a473a28242dce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX89G2552940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147490383621052635d4be7d52d2686691904041dbe7a65e6d27eea919b540d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2520559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06453f9221a30d117a6252faa03603332c564fa826b4010cff772dcd69d1a45. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6SA2448119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c97e1050b3279e2e805dd6770b95436d1b092d0f11c943eaa4dd3ece4c4896. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFN2441384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f1e6908f2c6dfb45a2ee3b3455c483605614a0cac2eafaba144e013f74f4f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LE2485373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23abfdddf305411fe3fcf4930a7aeea8a6faeff949175b2462fac6a2c7649332. 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/QZWFF2380410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340ec4a65cff4d9bcb2488888e3c98e485b81f6706c8b5126f608f65b197ed7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB82321745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce17da6b5dd86ab3b1f3a34efd61db46e0cd0d96d5c9c6028c957155c015059. 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/QZNWW2315592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd36d52aef936d4470a48b2ef32f7628e4a887bf70b8e5c1aa540f9a17abe1b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEM2382215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e541bac5d07d4b5f6146f23ba8010a4163abcab4786d098b1e87f62f6ff1d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN92355439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353c2b8a851908eef14ee63383e43aaa4bf660bd18f6710df7f38bc16d27fa79. 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/QZES82350479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4887a946304e143edf75a3364550d627e1f723d2accfbd9dff15c3f90aee246. 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/QZFZ32383900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05939c371074069d5fcfcd1f840f9f565970bfd4b5cf5f07844cdbe1c116619f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWS2217045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ab5da23bc4a01ae866cef37765bc21b0fafa348ffb13317ea13e3a3952d51. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZK6H2257796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff550bcd8bcb9c1b2d4ec7142be211d62ec3663c812a88c7435827a658caa16. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA62264035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d807ba0f9b26843221bc86db5542103b0706917fc1136149e1c17852312de9. 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/GX89G2598183.