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 0x653f6d62d351dbae587fe20df4db8434e7a080f94ff51baf1a1c4f7f9dac631b. 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/dfe5ef66-8900-4d1c-8ac3-01564d130dbb.json and https://artists.proofprofile.net/proofs/artist/dfe5ef66-8900-4d1c-8ac3-01564d130dbb.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 0x1ead5ffae1e4e109ec57f97009ed57184c4648b1f6996427f35a110e9ff171f9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BKM2L2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905227f13da25f122120a5ad1e6c07edf9fe8dcb60f070060b182e323b49c40d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:07:46Z), 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/BKM2L2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b95d63933740225ad7d8f5ed9c2ff2e163127b63ced25ad32ae1c5653620ca. 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/BKM2L2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b0de93e061037ddb720e494939d1a7bb23f2fde26ff47ca4e0d2df71d5cb05. 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/BKM2L2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823bb5ae2f77cc5b797b00af294265c376f705fd104af31627f5d87a1eaa41e8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2273586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288f2aed9575c7bc9cd80fbc98583ff759c7cd30431ad0d0ded08e3751b3d1f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKM2L2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb034018eaf26ec84d4a72c74f993e0debe46b6a4448482ef9d29a43f5642266a. 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/BC2TS2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9af5e6e077139458e4c475a8cf170b6f22497ab44257d507cb78ed3a5dd65d. 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/BC2TS2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257b1653d15b96a1bfb495aacffc8cc37cb6a5c28c1a7506a985526efa4be4fa. 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/BC2TS2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af871415a0db7aa50df9c0f23b8ae7043fa598a8c25543f93fcc2683c0f372. 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/BC2TS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4055b0b852ada6dabfe9e1d6da1c143c6e2c70b3ab5e2c545676821344b1f643. 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/BCIOS2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a1606c3bd5e7a0306423712192408a7044db07a96130865c514bafaa5e07a. 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/BKM2L2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9713e694f66db471e370226fdbc3cfaae47285818e41199c9ecf3eb355e66072. 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/BRKO12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ab81863d71e5475abffb63b10802abf4b0894f25215d653419b1ae9bdd7f9. 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/BXQZW2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657a1aebb240d4014ac8f09d007c9b07d0625bd9e47a6ed72a1861a6407e629. 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/BC2TS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8527515501d760f10068fbc9989e12c99d8d6a2f7bff2c763da057d3d13868c3. 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/BKNDN2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb3f0a1f21506aa9dc3021075f242411b0f3036df87a73941a52d1892457d42. 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/BKNDN2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af871415a0db7aa50df9c0f23b8ae7043fa598a8c25543f93fcc2683c0f372. 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/BC2TS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9452a0d117bb0f8f0c99c3e6f815b561443ca742ec42977cd121f4a6fd822f0. 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/BCM9A2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9af5e6e077139458e4c475a8cf170b6f22497ab44257d507cb78ed3a5dd65d. 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/BC2TS2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793186fe6e1823416275fe7f065f05aeb1791f30c8e408c422684d70106aa271. 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/BKM2L2300043.