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 0x4d7ec2b3786d290dfc0929ca042f656617ae49d809721a5e6d4c07604b84ac7b. 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/fe4772a4-30d4-4fbe-94bf-a0a95533ab8f.json and https://artists.proofprofile.net/proofs/artist/fe4772a4-30d4-4fbe-94bf-a0a95533ab8f.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 0x8be9e67bb6f21406ced5a6c1c8d34f803861a7bcbb08b1c26662f44b9cdc7a69. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDZA0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85abf7fe3e9c7ac2728b5076bd5784793a55a08ce4cf9f312b86756b315b68a0. 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/USDZA0600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b7416eaa15a96bfc1ae22eec4c77732c5d478862e33e872203cb56dfa1c4b5. 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/USDZA0600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2cd371dc1e2fee66b976cad4257413790d3718c09166de74e3d3691b014abb. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USDZA0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107c19017539f33816f436548c55b6e13b2337a922047122d02ef96f8204b923. 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/USDZA0600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac473f5bc5420b131fe79a2d8c4bce8f6815ebc67a011027b6fe0de8af298244. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USDZA0600031.
Sunrise ! a Day of Tango at the Beach ..
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f2a3674776b06428eff2eb7b8e0d669432e86835cf3e1a3b670608bdae7635. 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/USDZA2500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c482e1592f926cddc29166d6c241ea8543efe3957f66861b85e5d4507f6240. 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/USDZA2500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b51cf04b2e192a784739359ad45d4221e2364ae4713ef89592c9a076089ad. 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/USDZA2500147.