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 0x7f6c55c5ec8c0fd1d7bd5c9cd4f51fff06744d55b43c2b5d661b2720a759e65b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2012d73-1f49-4ae0-b8b7-9f475cc68da4.json and https://artists.proofprofile.net/proofs/artist/e2012d73-1f49-4ae0-b8b7-9f475cc68da4.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 0xc126eff2366fbcf1d99b92f49ac80dd6ea81985829103b922d7d5f54d80777a8. 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/FR96X1508685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f154a64a9a01a8cc27305e221e6b5159835cdd77788d3cc5c0a73f2821bdfdb. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR10S1637386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272499638da90dd785ab50d608c80ac96b04138735adedda1a170a2f5d0d8e7a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:26:06Z), 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/FR10S1637388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a460deaa584f7c7015208bb3aabfa14594e88eff030d87cb895f29876ee6de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S1637389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d329fb2c4f17fc3ff27cf77311ad0724311300e09a06c07b1149251d9181947. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:37Z), 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/FR10S1637390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc84d69505d27a200be92223597e967f12330a9b921132d2fd539db40055f642. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S1637391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51322a1843bbed72f444a2cbb5006821c9eee57121de239562484771f8ae911b. 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/FR10S1637397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dd0880b7ca1ed777801504ea715f6e07c830e29988695af431aa8da5d3199c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:03:29Z), 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/FR10S1637400.