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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 0x91ac787f003fc0741c36cc52f0f6e3eaf712c88bf59267c8adcd76ea8a0098f6. 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/908c66cc-fe86-4f10-87f4-2ebb8ca36762.json and https://artists.proofprofile.net/proofs/artist/908c66cc-fe86-4f10-87f4-2ebb8ca36762.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 0x9af5c5c2cd23fc903374f2a05ba3aa564b295befc91bc81093a2b65c7addf366. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHN32028147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4d19498b103e6458d7cf98385346d73b032556402c9b3c908514c57400726d. 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/CH4132200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc038ed03e0bc54e76b9d27b6d697e7246fef454bf4e93807c9299acdef99c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH4132200080.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc63be9488a35a6f446935ee82f08c56b8a4716227bda6f558a762b3aaefb0d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:59Z), 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/CH4132200082.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc1f35dcfa39f697424f5a4658ad8867d1098d17c7d725a6a3d061fe4ace4f3. 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/CH4131900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a8336a9b8013cdbc8fe02947d8eb4b1a48305b31bff059f2e7bf6cecee73b8. 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/CH4101800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0e7cb15b75de6bdd78f60951d0665d11217bb16cfc842a4c74637c0c48945a. 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/CH4101800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ae1ef2dddad44200eb6bf83c150d1a4762b7c3cb698364341a6cd0fbb37f91. 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/CH4132400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866bec65a122120d4f5c82703bbe75b01dd9aae16c9dbde22d169848e8d0587b. 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/CH4132300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16001f402ca5540b54610dae9bc7aa611bb1d22d80dc1eaa1935020a9ee67a00. 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/FRX282154289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5215d1a85c64aed7138adea2a4c02c457932fe907f3de4247a540a4d7d60c799. 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/CH4101600804.