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 0xc17f7730a9059e0705afe4c7c817369c4b51e2003b0f226bb2fc4716060cf924. 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/e9e8933a-2ad5-4c3e-b368-7f827a51eaed.json and https://artists.proofprofile.net/proofs/artist/e9e8933a-2ad5-4c3e-b368-7f827a51eaed.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 0xb7d3c24d556cf3347abfc2cf37b24bd292cc6d11466883feb87f8297c8734fcf. 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/USA2P2012962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691dc77bb48323c6f662e555d210c63fdf0d7238fc9a95e5b906df8ffbcd1f3. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USA2P2018071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe9657ae8075cad8f45e7eb448359a26c96d3546cb340b17182f7d59f2c5d81. 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/USA2P2024924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f31b82eb30d130f667abc4f086b6cb299dc2d45046b2eb57d97320556aea58. 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/USHM22186684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6707fb3f78de796ee13612e9b3e655e5ca329935f9fa89d8cf1eb7c24e647284. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM92149939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e21bd55d98a0b0e3c76e0c945b2bf6a59aa944426104efeef37804c5281602c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USDY42228351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a79746ad1ba2bbee3c1c0eed4ad2497e3f916c1fdcfe44655ad2eb4652e875e. 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/USHM22392835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff5929e62a45f36289eba561478b4b8bf6a4cf2a7723d772f6a58d7f62399e8. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USHM22392838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cc4c4ca755779dd90831da1f715fd4c10c0cde149cf0b4d897704b6ce61a18. 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/USHM22323386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3013bfd3a138c084e397a2d8a28ddf3583c199729b426fd36a047d99635658f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM22392840.