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 0xe14bd75cc7839bcee82d18dd264cd991c53fc09344b8a75ef244d50c1e3a254f. 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/39fa5f5c-8529-4508-8d5d-aa0ccfc63f83.json and https://artists.proofprofile.net/proofs/artist/39fa5f5c-8529-4508-8d5d-aa0ccfc63f83.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 0x1fa777fbf115d3d3d0d16f5d5cab06fdaee49a03ebb7fc3b8320d74e86bc856d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/RSA3V2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28ffbd32eb9d683695326716a24bc7a02b847a0af5de0726c41dcd065427f77. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RSA3V2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a2ca52ede68a982fc2b7b30524fcfbe640202a86790929b61eeb5350ed7ca1. 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/RSA3V2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a3328b975edca110616ce387b5af51b80a0cc3bf5bef6b9bc038749d06d788. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:49:03Z), 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/RSA3V2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec6e474ad1583a0cde5b50ad68f5fefc8b2c0cc626cebcc967da91fdce2890. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:49:09Z), 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/FR2X42540044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de5fe346d9760db6ed2dd818af2ea70edf9f45539d2b6205516d5b438df9fdf. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DGA0T2441443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4838f4f2d817bf184495b1330ba4dccc04dc8cef5013b992f5eafdf9be4e36. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:37:26Z), 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/DGA0T2428485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b87d617b376903b94dc922371feab2585be79797ed8f171cbc719c2a949a71. 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/DGA092434824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddc410940b590b2232b6132d886dd87e75fcc6d08f7247043ec0104bd60b720. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DGA062441021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4fddf22540e5e4dfac53ff21992a091f264c7bfa843d3c7f6dec72fbbc842. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RSA3V2400009.