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 0xff49f55c6134391706a127c9c13128510a6116e7fff19de09c268504a916fcf9. 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/fd3dcf77-b6d4-431c-ae4b-de179d940fab.json and https://artists.proofprofile.net/proofs/artist/fd3dcf77-b6d4-431c-ae4b-de179d940fab.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 0xcd316e427a9e88b7917e41b3ae73d51a1062483ab3fe2379bb88c4772730c0a2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:56:19Z), 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/TCAGH2277317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a931e582866e05b811091c4867d74cce128a9be45c690d957dd11f2290e0f0. 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/QZTBA2361797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2619639237211738e018aa715168b9db84c3c807227b8b9dd8293785ae86654. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR2X42539317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7016291a82a3098e24c50212f079fef93498b65b881c920c64c1eaae49e05b7d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:57:17Z), 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/FR2X42539319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0e654e69d2e8bdc394cd06f8f9e33b8c87eb6a4af5dc0dc96dd448bf00974b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX282511188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d778099c8cc1af7697e8ae888582e0c6b41a1ec1ff63787b10254076e289a89. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX282520310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2971d7b06a0015f5901a75a859e88527000a78ecef9fc15f90682f6c946bd2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QT3F62516191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eca7429c5788c2e23d8bde395348e7e91296ca9bc1aec9f17c86b7c6f09e1e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3F62516192.