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 0xd2a092686e781b3f20555cd3df6d222daadef467ee9dba17365a568757b81280. 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/11335abd-b230-430a-a10f-8115b297fad9.json and https://artists.proofprofile.net/proofs/artist/11335abd-b230-430a-a10f-8115b297fad9.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 0x4151f38e1ad85573c2834092f55f6a4dc848be3635ef1aa1efb30fad4ccb4fdf. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBKEE1800942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9caad57cf55f41938dee304e95bbb60ff5498d246ea758b00952839be36106. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBKEE1800952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba4c304bf49cb6e0e6338b960ce6fca759e5bd1ea19830eba8678f12f58537. 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/GBKEE1800943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42f55d5e6c90fa94a22926899b17e2f6c10a49fd17d6121400e20deee5b87e0. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBKEE1800944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a273c5bbb0cf731aff28b24fb4724d45b337f39a07448cf6a2deb85f4cd9b1. 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/GBKEE1800953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e548d1fc06ca11dc8434005718a8e960973fb1836508afff395d8bbf984438. 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/GBKEE1800945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9677ed47ecf0f7a69a0938b945121570b3231adbc4a87c82e5fa51f7ce7b62. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBKEE1800891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c19ff1ff7c60b2567224921ac63babfdc721ca4e1803a8db0475a10f60cad4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBKEE1800946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61afc98075f62769e062502edc0dfa87527c99236b54e74b00d23bdc8110a98. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKEE1800947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11b4a2dd88784f7989cdf7f2089f69ee1a463573901c8d5d400e76644343d36. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKEE1800934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d30d672ffae3eb957bc27d55f82a0bac103759cec08fb4a5bb34e0d72626c0. 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/GBKEE1800957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2addf5860538ce95e5bdc3179e3d7a6db7305a4cd617a2e1563db298972b64e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKEE1800948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f8f0939bb9d15aa31f88d28801f3d833e90593677fdb889153b009e65b367a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKEE1800958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf2369f5e1e00e5066082718678f4bac35d1e865ed484f115b6b05a2da3b12b. 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/GBKEE1800950.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f66a924a5e323ef038aee4ec276f8afd45340919492cae0c21c0a511a61066f. 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/ISU110600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f66a924a5e323ef038aee4ec276f8afd45340919492cae0c21c0a511a61066f. 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/ISU110600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe677c30d498848e0d5390b8430eeaaf03dd2f94548ee3e7be86f7d3edf32be73. 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/GBKEE1800917.