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 0x220697b364154cb63df87bd3b4523d9a8c61a9eaeecfc1bc44affcb163c95c21. 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/d5716577-aabe-4f76-9a13-0f7dc18fa0ee.json and https://artists.proofprofile.net/proofs/artist/d5716577-aabe-4f76-9a13-0f7dc18fa0ee.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 0xb6b9a2a336325cc8b1ded1fdd77feddcee3e9042558172e6591f53be44b08b99. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXP0K2400999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccf97e4827aede48c3e21dfa083cdeecbeca729c3bec0f8f639a898fd09af5f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/US7VG2404184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672bdc8b98083ebf924e940e5279afa8baee976b7f574b60700cc2a1646a3e1c. 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/QZMHK2392358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466e6479c3dd1e811360dd6a80513cd5fe7708acc1bdb780fb0ce0c3c8bff3b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKBLS2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2473ab60f9de5478677b24199ab41563348127806c887eef521b66bafe0f8c5. 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/NL8RL2502593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a76ac56962efc213c4bbddd8b73110d184870b662144e4efa12a5f67f4937e. 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/QZGLM2512839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ad9cfffbb40583eca7d3ffbf05f5eb7bf0635fa3b15d586dfafd91e79e34a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX4IU2501126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbb2ad8ab1646f18175e56a3dbfcfb157cbfcdeea97159ccc51216a4e1180e3. 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/BKBLS2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f017b7ae2867d8059ac43f030b3685151407847d6e6cfd3881b13c72ffe90. 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/BKBLS2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe27bc26890417f3d175387c81efc47c36c90eb87998a2c8ab19e470b9d055e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22402250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466e6479c3dd1e811360dd6a80513cd5fe7708acc1bdb780fb0ce0c3c8bff3b3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BKBLS2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a486d96fc4110de96a50155430ac9d657fa0386052066dc560f049208986c1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKBLS2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea307f884c9f7cf5d95e7ed787276a4ae91e6eb32d0ea85cc88e9894725e8b8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKBLS2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e58963ca6752fba14680999abb454c0018367e1aedd6c719f7e8a9594e669d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKBLS2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59dcff9bc81fc2495228a312ef9254a5c972c35bf264dbd5cbdbe7f0c9185c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKBLS2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb4c2747e7d514396d3479487c458d73f5f7596a7df72a5252e29b0a7564338. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKBLS2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2912d1c6ee8954ee6657f7f81a7e3e3c5d35d261953e5c0e7f1c407111249a74. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKBLS2500045.