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 0xac7a04569c86f35f14badf2f11907bb422cc1662a98df4aed49999646f585e40. 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/d8a22f83-cbe7-46f3-a549-3469baffa1e0.json and https://artists.proofprofile.net/proofs/artist/d8a22f83-cbe7-46f3-a549-3469baffa1e0.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 0x7e71d6fa2f11d05771a09c1c4ffde41f7a1fc9762c1caf2a75150f26ff9168b2. 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/USJ3V2075253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852d9711b611ae33254fe10b516146b24b636a8d7bd6e541d7a30e9c7dfce3dd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJ3V2075254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5e3c3e95f6397976a404e48513d44cfa650759d1ad28b9a51801dc95b98404. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USJ3V2075255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d41df0f58961efc5882622475a32d79be96b454f2c17512673fffccdcf83d1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USJ3V2075256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b16686101ecb64060a7b4f313b60fba9eba65e0cb6da97f2979e160558a09f8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:04:50Z), 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/USJ3V2075257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa307d2ade4d1f0cfef6d2f9581f684042127f20ec3ee2e69b9bfbf3580a0b9a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJ3V2075260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe5b94ab28238fd3c8ef5987437ce981fa0308595e260657d1b10c3e2244c0. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:43Z), 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/QZWV32461776.