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 0x5335933053aafef7c99c3e8a215daa83dca43c8450dbf2420e4483f1532f704d. 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/f54ecb0f-1643-4c2e-ab38-fe865041cf20.json and https://artists.proofprofile.net/proofs/artist/f54ecb0f-1643-4c2e-ab38-fe865041cf20.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 0x60c75ba911f7965273e683a54db025148209a9aa3ecfac0d9cd1f013bd66648e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/MYRK10820670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452c9a0f150742f5d66f4564e92fa880693e8813c8d5efa4a63b750978bea615. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/MYRK10820656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba2cc24f970b37237fbebd36dea5eaea9bc4022dcf5b98d18b08a66baae061. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MYRK10820667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13c366adddb0b13a892665f13af069dbf3dc1f80f32e1d86e750a8833296923. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MYRK10820659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946963dfa3c8c9153065858761b6aaee7df85d8f9fea616bb0deb895c9aaa8ea. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/MYRK10820654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d671c79d2c15328230d4b56a3284bb48714a7ecbfb321d05b036f66570c6cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MYRK10820653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7a7423a14461ae0cc28d2d9f5ae2b480a1136940b493349d5f70e14910eed4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MYRK10820655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e897f6a0d35dd07715775b1b5b94e8a78b90da38394e0c36dd8b0e6530ab1ce. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/MYRK10820658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d20288d2b689f27b052f1e2b5b91bc595c826bb3f13c1796deb3ade85c28477. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MYRK10820661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3e582849fa445f34fc0f9c34fdedbbdc47014fa8a3c4ac3209c88b854bcf2a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/MYRK10820651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771092ce1430ffba5ce21cef74fa95ec1cfd09a2d51c7b96209275da0712116c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MYRK10820649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42206e26d4cf94a5932a828bfb3c36b1658606fddaf1b401ef0110a6f2373469. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/MYRK10820650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13c366adddb0b13a892665f13af069dbf3dc1f80f32e1d86e750a8833296923. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MYRK10820659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3189aedf12c90cbf1ed3c949440ab21c1b1fcf1a7fb019923749a9bfb54db28. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MYRK10820652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46dc58dc226107674cb65793311e369ac3865dd7c16c763044a3688645fead2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/MYRK10820645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa933b55ba48b3dbbd76d426303b5fc3f535d79046d81b6abb04f88fa38bec0b7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MYRK10820668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b88cda7aa3fb94cddebf54b32103489efc2e5c8548f2325f842cd52d7717cc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MYRK10820669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605fb4831afd4d7f2f5bd5f50bdda1086abc7d00747bf9c38695460e9093c3f9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MYRK10820671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f24532afd6fe0b9917684650917f73a6930edf6be01519e26df757d93c550e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MYRK10820648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946963dfa3c8c9153065858761b6aaee7df85d8f9fea616bb0deb895c9aaa8ea. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/MYRK10820654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40195ce9a06a0ed44a44b6f3e7dab59295e541f9f2e438d489fe720719406d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MYRK10820657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff159b35f8e7cd0e9e143e05bf5d092116f38df39356c1f37a3791985a91e5a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/MYRK10820642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7a7423a14461ae0cc28d2d9f5ae2b480a1136940b493349d5f70e14910eed4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MYRK10820655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1184b3c951a00ee4a323d9739f4152311abb60e74cda470a6224da132c8c9b6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/MYRK11221189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40195ce9a06a0ed44a44b6f3e7dab59295e541f9f2e438d489fe720719406d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/MYRK10820657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946963dfa3c8c9153065858761b6aaee7df85d8f9fea616bb0deb895c9aaa8ea. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/MYRK10820654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907447fa2690c166a481228e5227489ca96a1da0e12c2b4e30f8e21694021d38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MYVM12300109.