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 0x0406d66acfc72459cc8eebcc2cde2741ea8ceab4e43c838ac1f194d15dd13add. 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/36126703-1e78-4511-9f94-5cf5bea066d2.json and https://artists.proofprofile.net/proofs/artist/36126703-1e78-4511-9f94-5cf5bea066d2.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 0xec41c7d928ba87cd662810125c683391d0b352e1d2e7a2edcfbc6893ad5123cd. 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/GBKPL2004975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bc33803b5f26a9ad870c9b43cdf29f3d6667e90e4a9b28d793f731f342114c. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GBKPL2004973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f76e5c01bd94444dc09b1b998a79225612803d114c31dbcd5bc2a9afc9a0a9d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QM24S2106240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679166115b6e6f82c2081d0f2351b64d62550b7b22b5adee58ea657a473e49ae. 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/QZJDW2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52868d1aeeeb92868b274d5c8fbf6f487a2df8a63b785c95d85b08fdba8a6918. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZJDW2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca0550f793e08aed75f2db1c45fb8577476c76bee542e4162b86dcdafe92fb6. 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/QZJDW2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148be2960ad74fafb2ddf00660b40ce9079480912d31800cc570dfdf22e80b8b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:49:59Z), 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/QZJDW2300052.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd7407248449f308e4ac761b363f63c7f780e47afcea7c5c0e10ceb547ef77. 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/USA2P2440513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf681403d46a598c144acdea55123c3de5b50c5b5cc7f995c35ecbaa8333365cd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P2457687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8e3faef79a28f8f03d3fb3d2349f467ddca80ba158de6baf57cefaccb03c38. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/USA2P2457870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd614b1afcf89ac8dc1a819f2c7d62711a78ae986dba3aad31cd62dda66bf97ee. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USA2P2462967.