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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb71e504c76740e5d777923c3a2db18ca1fc83bc5a9bc1e4a732cbb622e1137. 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/bdf0cdb0-1711-456d-9c9d-5828ebe62905.json and https://artists.proofprofile.net/proofs/artist/bdf0cdb0-1711-456d-9c9d-5828ebe62905.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 0xfd7fc6b6a0a5ed2a99342e05a6f4c3c9c455426a662c1fea4f7fc6554377f23f. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/NLGM11938232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0054571541d78835757950f2573fe130d2ee2dddf4704bb05e1b6d0e4c79370. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:32Z), 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/NLGM11942650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca1ecaf6d61ac3d5d650c82f3fc7f635878db101955bffbd1b28d76b3355e4e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLGM11942652.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293843bae0d13e941453e3016666e5d172f42f2e8af2f4c809849c182d891760. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:44:56Z), 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/NLGM11942654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f9d60c64912f845fff469955a39229d8cfd09d359c3252f69f87fc4d9b1db3. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:26:17Z), 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/NLGM11942657.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd130f082423ce45d014d60b3b59a25293c15fcad01dea9a7ceeee70bd285c269. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLGM11942658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b6e622a4ea8c08b68e1786a56a2bd033ddd63256c08ea66162fff487346cfc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLGM11942200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7debde2078bace0fefbe5d625da79c9f67bd547cbcbd9fe932aa5f02dd4861. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLGM11942202.
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