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 0x292a8d56cfe6bf49700e61f697380628dfc812302b1d72907bcc329635f46427. 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/2062303e-2db7-470b-a66a-42ffc2404921.json and https://artists.proofprofile.net/proofs/artist/2062303e-2db7-470b-a66a-42ffc2404921.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x6b0c6ebf10cd97670ac3dd0bc11f2f948307ebf8b794cd78cbe4bc75c98825f5. 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/ES50A1400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b560d104932efcd23c4d48086d021ac2c7e2cf90e6606e391eb67af7ca1d3c. 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/ES50A1300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbdb15e74c6c6a33a27e880c99a2a41ee60ad9c4655b28acea354701b1e65e1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:07Z), 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/ES50A1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f497d6d6d4bc47d2af685cd5b954c7797e1915da4c2cfcdbc3c54d829529931. 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/ES50A1300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90c593ab7b06a8dd7a0a109739a404ae78667cbcc418cad3f2c17f1f5683c1b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES50A1300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3f9d80e3dd80faba4e17c5993088f590d53cece7697c41140cdcee4841f31a. 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/ES50A1300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0f5be873dae647cbf90f5a9da08f5885c2efecd9f568b4d4553f59b14508fd. 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/ES50A1200645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542b8d182750f6f1c5e905a0119d7ff1fc8c2c53d9a4aec62e002eece0d9fa3d. 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/ES50A1300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a219710e3a744d4efeb4372548826419ed91c14d8d052c82afe63f6a76d98f. 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/ES50A1400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbcbc93869a6cef7a9e34393531efe8e498cb535fa1f65ad88ff16636af76c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES50A1400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26537e9ce682b552e3deba374b21054fb40c951a692ece36a9f01347f4ae073. 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/ES50A1300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7407d35abe2360d3349e2fbf6ea8235d7850f70b342725667cfe809a64c7add. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:12:36Z), 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/ES50A1300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff607460e5fa68323026d8d127d51235e2feb94f6a1d2d593a7a31417380cd0. 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/ES50A1300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe038d06bcee786475c1b8c8dffc116e617ca04e868e7fff8efa3651e6e7fd7bf. 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/ES50A1200707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b72bf8ceefa639ecc4d214e9674763eeace4a89c6b60b4d7db1f4f69c3722. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES50A1200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56f7bbdbc14509ba5b3129f36c8998280588cdba2db2161dee0e07bb4972d53. 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/ES50A1500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69b7ed26b376c19696b04fb5e2cb841f1e4e968c3d68ffa10f2385c8f02c31a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES50A1500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd5c3c9d01c3db58ca2368ada6099c120282884cc7d5c4311d009aa22b5965. 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/ES50A1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13496777db8a5a27ae4b883f3617e406dd69f648face733978969301820668d. 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/ES50A1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe652fd032831ecd6b2c99a885e1f2bd4df23e25293a78b5631568ae78ca11cf8. 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/ES50A1200705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffbf083d349ce4a4883d46a15c863c5030e853763da79bee3f45fbc90e3be88. 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/ES50A1200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b9b83c41003eaafa9360272fa04ea9e78da52f93d2c305edf9721f4adcdb5f. 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/ES50A1200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed93e591b1ebaceb3fd4579b10f753867a1a771c67b6819078444bd4d2c48d1. 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/ES50A1200614.
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