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 0x03f046809fcff36ba976bbaf6c795bc7db666ec938ef2c95e836610e95e06007. 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/b8635632-4da2-43cf-befd-cd292f47961e.json and https://artists.proofprofile.net/proofs/artist/b8635632-4da2-43cf-befd-cd292f47961e.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 0xc6480b18ebdf85b1b6ad9bc16c2423286e6cd0fb66d46a052e6506cec82a0db9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMDA71563929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920d9be5da6b925bee25783a4444a270f1d6f9a48c3d261b4ad5bda9794b84da. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMDA71563930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5d17d72f33598830361ab137575d8d12bbc498fe406688513abec3c2228818. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TR0921200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743ce26cfd45fd475530dfa4c4506c44b5f879f4751951491e2dc44d351764de. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TR0921200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2471b002044036e50ec1bf1d1a6dfc8d8bc6b6807ec415d35576f12cfbefc22. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR0921200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb3447dade0099bdc8601a7838fb9b1a32ce68f169221b002ae3fb3d743500a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TR0921200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4135ab3e46a2d478482e4952041bec8edb37a6a5d27667cfecc774ee35fb42. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR0921200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc51aa9ec35fa3f1f17315f0b5ff13d60ee133db373b95cecd1c5a5a08177aed. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR0921200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3235cd2c42b61e8f8c66169b8d45fc84d75869d10aba4e6f600716820a8429. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR0921200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5d17d72f33598830361ab137575d8d12bbc498fe406688513abec3c2228818. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:38Z), 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/TR0921200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa184527121de5d22c724f1aff0181ab698fce5bcd0f280bedf1665d57d26d551. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0921200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cf21d16be22a7cb886368f3c01f4b1e627f14a48e3056e2065676500c60e3d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBSMU2166438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef384eff80eba0a218435e21d44a052eea165f3131e3285ed91fb5a784da53c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBSMU2166449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9e11d23579f4c56d66962884ae73b30b58e7926180e6a574c8e2dfe5d6d0f4. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GBSMU2166103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4e59af37fc21c1270553d6dd4f7002554ffc7137459aec47d75d2a9db62dfe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBSMU2166126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b3a3337cb5c60e096da67015eab7adc86f41511344162b24974bc004135fa2. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GBSMU2166131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c021b663548b1f19015df60050481436b4b80c118653c862c66a8e6ef7dfe92. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/GBSMU2166155.