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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 0x1e742acc00874e4eae3225d89e097f82246989531f91376e27f927c6e11271bb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6693059d-0a89-471c-9fa7-1c3b356f8ee7.json and https://artists.proofprofile.net/proofs/artist/6693059d-0a89-471c-9fa7-1c3b356f8ee7.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 0xf56824825d517108633c6a00fd2921653504a035a4b5d9f700712a6afbfba030. 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/NLX1G1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701771df4745f33381c0216219d127b4cc1932259ef77797be2fe5ed615567b7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/NLX1G1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584e39910c057b5da45096b9e45661ed3f0d017ce771aac0ef1d1ec348bfdaa4. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NLX1G1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92240279592bf0e0e6520a0704a65197ef2bf72b19028fabc8ce26e1312a2fb8. 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/NLX1G1800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd334406ac147d483aadd30d412de84e1d48ab7d103aca3d2ec3b0443ab496. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLX1G1800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93721e1ac73fa7d4c67fc65474ef75998f78a909b8eb95fc66a9d7278f17f6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLX1G2300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eff6e8dbc81bc9e2a677f2527a7f82667dac07b424e429ab0a8044e897405f. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NLX1G2300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4692182205c32799f342798a1be062771d90abc90620e5a1619056b95bc6678. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:19Z), 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/NLX1G2300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab6b344e6877ffe91e17e9f58bbf62ed439bea60c6c589ae161d6e1fb8b91e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLX1G2300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2967c11dfb55103674a59b6ff880be389e4e19c6844b14c3dbeb208abda1d6f. 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/NLX1G2300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758b8721245477ddc5dd20c622d3c6a5b24e2db4253e7c9999231a9a1d782d3d. 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/NLX1G2300327.