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 0x5f97fc6a936674862aa40907a0bd82bdd90a7f3c58223f6d3c35f967b6df2651. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e71b6c94-8e41-46d6-baf1-aec927ae3b67.json and https://artists.proofprofile.net/proofs/artist/e71b6c94-8e41-46d6-baf1-aec927ae3b67.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 0xada9159edd9f0858a878905897939137cd2e3e3a4cab1b3cc9361b78139170a0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BKM3P2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9029f2b6e84741fc9c6e2c4cb79c581af3cea8316f736c38c4d126aba8f1af82. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:11:42Z), 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/BKM3P2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7207c8f75b3a2a1144e3f6eed858ca2c1c941217d4ca1b0606250a359651250. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/BKM3P2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e6875c580faeeb0e2da865cb3beca5c623818d9eefe6ad4dcd63e1e391c055. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:26:45Z), 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/BKM3P2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeba4bb36ddc8c95cc1b21a1a14ce6d72256051471fd2e2b96e3e8bf8673c2ec. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BKM3P2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cdedcb87a44f61d3d3f94c0d57ffa37c1f959572acf0ceb2167c2552f928fe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BKM3P2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1af1eb07257842fc2c039ccea93d17e00e365b014af265d2eec21e416bdae3f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BKM3P2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe266007274450eae8616d6d0e90e8a3389a60c1e7141fb14f05d73055e34dc46. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:35:32Z), 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/BKM3P2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf954742cf2616eeef8cffe9f378676379a3e043d88011c41c16b5d83382eff. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/BKM3P2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9c178cbfd750cdac259e1d77decdc98d04d59b767c6980f5e05b0154f467b1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BKM3P2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada9159edd9f0858a878905897939137cd2e3e3a4cab1b3cc9361b78139170a0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BKM3P2500001.