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 0x1d03870ccbc717bc84a2050b24df58f73704e809f9890998582f75fc8de6b1b1. 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/3f827f1a-7880-404b-9ea8-f2313da1bb24.json and https://artists.proofprofile.net/proofs/artist/3f827f1a-7880-404b-9ea8-f2313da1bb24.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 0xac99c198c03374b4dad10afbcc7f7103a086b9c16bd97e89f2e12b6f73e94ff7. 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/QM6P42099862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3472026e199c826d91dd96ae0a546a71ddfcb148509e3324b7407302e2841089. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:32:03Z), 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/PTTR10400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f842f6eed5c41686b812ece3b5c8e0ba0cf4e005e624ba755238bc54b4163f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PTTR10400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f9c63745acfe1089fd1fb93e9f46af3094e74ad97da20a7730c6ffd8b120b8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PTTR10400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2395d87a965b8da46a8f40e6be9bb175c49e02201d22b043721455e523c8143. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/PTTR10400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a95dd6cce0f3ebbb84dae07e58e9e27e9ec3ca74622a3dfc3d674dabd66756a. 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/PTTR10400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4ccd6ad122c8b8ad4d266a4681b39ecd8c19c1b6f9be016ab11d2f814596e0. 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/PTJV10900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a6c070b0c8ea08f97af82de28944c9f97d95f129b397a295b93409fc8663b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PTJV10900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06ae9432f947bbee5f69f0b17bc3059dd32abfaf958192982b5496e8ccc0f48. 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/PTJV10900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa079793e7b81ea34aedce65ad0a5c16b874bf1b0f18983c62f8cdb306e435375. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PTJV10900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393761d2d9c82fc4d5cbb1296c2772af46af9a207cd2c027f84776a6b8290ae. 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/PTJV10900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3706740966c35c885495095b7888341fba48d8f915cca910e64d68ec3df85b68. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:41:18Z), 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/PTJV10900018.
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 0xc3348aa6cf4e482e9c03035869b0619822eba0bb1dbd7c6585e3f293c19b115a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:10Z), 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/PTJV10900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db1771f45292fa506bb3fbcd2ce514da4ace6499e735d00151be37ad604e222. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PTJV10900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2e73ccec73ff3b5e1137830081f0907d743a217017dc2279052fdce63c4c29. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:29Z), 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/PTJV10900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdccc75e0d36a86f268076bb46349973ebbc42bf4ab8f6339078ceaf5714b790. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/PTJV10900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baed2b51a1986c2c67f85301e099b163ed09de0734dbca17849b26bb2c10e74. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/PTJV10900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc42c0780d041c3adad54b98749cfcc53c8ee28c2c108fc3c11b1dac4a880341. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/PTJV10900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac1436a47b636646e8fe17dc6074c5117eb7c5a797aceea7b573fe91fc288a6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/PTJV10900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763aca9c989ae499feee703ca672bc0146b7721677a706468b0c6705f97fbd1e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/PTJV10900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949d465112cb6cf97ad261450e116fa53a2010d0368823fc21adfb8eba6d9b51. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM4TX1724250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2138a5e3b5fdd14deaf1cbaab829006e9c9329a23569de4746c7bd697aa5f3e2. 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/QM4TX1724252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336b4c3cb352ce585ce51a35b5d1ff6ee28d02f0c3c3cf653f1b541b1e2a862d. 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/PTOCA1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7530ebf7381ef6e95865c884c79bf36f1fb7bbea4f8b8043242f49c2b5f5d9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/PTOCA1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e8ff9f11c1b8063f3c104314bbe0abec21126d3103b0494c0478e0c3c455d. 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/PTOCA1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0060c61eaba170f73bcb69137f12230cadec76c43175b622c22f8145b294d3f6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMDA61816597.