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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 0x787516896ce74c3127afd93811f0a4cbe52a6fcd01c7344e0662cca7a4bb01b9. 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/939d4ac4-6dab-4fd7-937f-80ea447a8d32.json and https://artists.proofprofile.net/proofs/artist/939d4ac4-6dab-4fd7-937f-80ea447a8d32.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 0xda3dc128fe1768eb6832e7859ac11db46548248252bb8641d904fa8471589768. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/MYUM70900943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11da09d285358afece5d70e2a84147fb70d415c14f378b0ec46724cc348160c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/MYUM70900944.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845285b5a273b279f75960ac109e0feef854bfb8ca349685cc434785b2b75cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MYUM70900948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b93f65ed26b67ceeae284ca750cb089788cd2540fdaefb6dc6e2e512cd7f112. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/MYUM70900940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d233e792778b9152bb211bee868e65768341e3ff95a99c55480cb3a633ba6a9. 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/MYUM70900941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4befef92084e549c9be093aa9074fd8712172e131d89a20dc4e94d97734075b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MYUM70900942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4e1417cff832c13f6146df55373b1115690b7fa8ba8509fad7035e0751bfa4. 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/MYUM70900952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3dc128fe1768eb6832e7859ac11db46548248252bb8641d904fa8471589768. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/MYUM70900943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11da09d285358afece5d70e2a84147fb70d415c14f378b0ec46724cc348160c. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/MYUM70900944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bf81f451153f5821a165daed96e0d5f783c99f8df9c2cd12384a1352acb4ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MYUM70900954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00ec9ee98ad768b85f10040586628394f72acaf2892253d9173cb11ada551f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/MYUM70900945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443c7cfb0c8364320cbc3ffd6b2f8070aab0c7fa533babba86e2c85388d79377. 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/MYUM70900542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3d4ff537e19034c1822ef6b47aa5e31e7343c8991b17cb88fb4f50a4910b67. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/MYUM70900537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caf0d0c0be65f06c2fe86d6f24e9c65d6ae4cd6c99e308a1b9fe2e7c34023a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MYUM70900538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8dcbae2a4afba56b953d1e39bc1c28ff2b40cdd1c62de81fc144a47f1f5439. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/MYWU12100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ced56d9d700e4be3e771411dd69d85358d4cf0825ef9ce6ffc97544998b2637. 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/MYUM70901866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2201a1593356d44272998446f3be548f337c4a961c2b0b8dcdd4dffac86231. 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/MYUM70900947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf7f09bfc96d125ad6324d49b5f20797429a2dccadbce690f3a673e1d2988b0. 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/MYVM11000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ced56d9d700e4be3e771411dd69d85358d4cf0825ef9ce6ffc97544998b2637. 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/MYUM70901866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd1d27316ebbc430b0e2139f86b2ffb177d123325f7e8bab63db6bdcfe342d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MYUM71002137.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43377e5763494f3f383fcb37da3f08556bee984eaf04346762b73f61e81af85. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/MYUM70900540.