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 0x2056052dd032e14d6b689981eb20c620275ceed3a87ca44f7afefde45651a885. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc4f17b7-0ba1-481e-9eda-ab064d3d87a4.json and https://artists.proofprofile.net/proofs/artist/dc4f17b7-0ba1-481e-9eda-ab064d3d87a4.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 0x7bcd8a2052fd9c98ad8ec51a8022614609a50d90bcdad46bb6fbe8994fa01426. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL5UZ2504700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4ac9c870e66416b437e1268ff0ebe9fddd904e74e0a59a7525e5337f74c9fa. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL5UZ2508315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8259440436fb34ca2d206e2207e3a28f6554bf84a2b83846679ce51bde5084. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:00Z), 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/NL5UZ2508316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9102099b2f0eabc18338cb3d7c627d348fa2c3329497c6ed2b60d6ead91e81ee. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL5UZ2506836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8ae02eaa137df855222b5a04941784f75c45b07b4496d2b2b70447fb31a6f8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL5UZ2502045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e74d52e6868273518b320cf5a3ffd74f96971d57e8058e583582c8d0898625a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NL5UZ2508318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcd8a2052fd9c98ad8ec51a8022614609a50d90bcdad46bb6fbe8994fa01426. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:28Z), 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/NL5UZ2504700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8715c624cbac0ecb039140a093f3a0b90fe2b2cfd5a6866ae82f3ce51c336042. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL5UZ2508320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcd5d7a21390d2fe2ffbc17b611ac0798a87e9114b762a100977e38ee9842dd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL5UZ2508321.
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