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 0x703b5e10dcaafcc639424573452cef9730494dccf0857f55e798c86d8e4d791e. 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/ba1cea45-5085-4d8e-8dab-054783b589c6.json and https://artists.proofprofile.net/proofs/artist/ba1cea45-5085-4d8e-8dab-054783b589c6.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 0x02ceab55cb619fd5d47a67d31db44e82c00040b83296ad2650fc29a54cb0a7bf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMBZ92034584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449a56d44316f4543c66bc2ff0c1168e4e1d1b72b3b6d62817d08c2755fe795d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMFME2085939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b76dec9d48d41385e80f94b20303568172e0a46ee098a6e0e021ebf3ff81bf8. 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/QM6MZ2113146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782d56c2e209ff4f005db6fc5f1743fb0022fab3f0665e83e5d7a7d05c6fd623. 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/QM4TW2253405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a48608f07a0f8fad280941e53acbf7648404b36565984263545b4fde9146a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:52:30Z), 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/ES5702300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1e53cc8026b1cb5abff757b4241d3b9665ad105ebc58183055835bd1a27165. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:12:27Z), 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/ES5702300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe136ccf5cb9f021f8099326b4e6e3322209e2d4892389f0fb12e7a3864b70bae. 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/ES5702300177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f86177044847780be7c3e34e7afd2a14f7537205033f82d34aaff509d0769ea. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES5702300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbbb4e733695de8e3721949e40a615fc987ddf68aef560cba81022da367705. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES5702300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dbd360a4af5b4d843acd9052a29b1b1a6bc46616c340b5b9124fa0c6347fee. 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/ES5702300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a48608f07a0f8fad280941e53acbf7648404b36565984263545b4fde9146a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:02Z), 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/ES5702300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91119094efe11f6c39c92ae036251d329433e9287a95525a0d6f8c268bd0e989. 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/ES5702300178.