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 0x614ef6fa79ae10462ed5cd29111aac2eb8c755d26c16c0d9c150653d83bb23e9. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67db04d0-7fa8-4ca9-9862-82e0d0ad41ac.json and https://artists.proofprofile.net/proofs/artist/67db04d0-7fa8-4ca9-9862-82e0d0ad41ac.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 0xaa0c9f20836ac8feff33a486a08960faaddb29e3daa2a5ee56ecc7e88d5fa93d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:27Z), 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/GBMJG2015065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f7fe266a4fbff629e4c6c2c6dabe7201b49a7b0ed05bcbdc59fc12900d4247. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:59Z), 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/GBMJG2015102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacddc36a58db9d0f82f83200e5a95a86a642670bb4bd6f8b0cb60f0820eb0eb. 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/GBMJG2015103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847a9b434311d3379a8b3f52702432db44c78f6f14decfff1e6d601ede8486a3. 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/GBMJG2015106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766bb74559863e381277fe8cf560208bc0ec571aff3b80ea59d9c9c01971cda. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMJG2015107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367fe0565ee4499dfa19fd755237d017964c43210ed1c7b659c0acbf413b7436. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBMJG2015109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c7fb9b565f12d81764326317c9e2140c6fc695cedae3d1a50fa9d11914684f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:25:59Z), 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/GBMJG2015112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc10149b0239b5f0d7b83553aa725f0dd06dadd40a7afaa66b445ee5b025284. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBMJG2015114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e13edec7a2d76434523b9d5af48a236f81638d3e2a8b486e9ac9e74ad2100d0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBMJG2015115.