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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb89aa87456ba245f7c4124ac504e23327ba0608a38093ceb7ed2a5f0132dc7. 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/2414333a-21d5-473e-a4e5-b089b4b51f62.json and https://artists.proofprofile.net/proofs/artist/2414333a-21d5-473e-a4e5-b089b4b51f62.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbef16da61b309ec7daeb7eb2cf5ddb986559b2b86d2714c9f34a226f7b404e5. 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/DEYM61900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcdcb2039530d1cfb67793c8cdc8de89c8eb53529497e49ed62ae106fc8bc1f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEYM61900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90298b001c91ccc0c78a1d4a7955a744b25d815e07be815f4ddd63423130d3f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEYM61900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db94a7eb809438c3a1717b23c4cbb615d7458b2b0db9a88af7e66582aa3c430. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEYM61900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a0a7ce01873b2471bce699b2078d96f568b4a8ffc1408593d52abcfceb9f27. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6P42456633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b525de8951e85c2f6941d44b1506652451f0294fc9f43ca6c7df17cb2a1b6. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM6P42456634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd37b8ad287a4795f844868be7e6b46b061954adcd0c1064002ded53e63e5d0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM6P42456635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9df6a52a881168ea7a46afa703401d49b71ef2d65dfa244abf48c4cb7ac262. 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/QM6P42456636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60606052c5f6cfec9412ee99ac1e6c467094d4aaf399790de6e7f00afc1a53c. 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/QM6P42456637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d567a3c251670d9278c16fe729768dfb58637a8e46b33e9ce8a497e0710ed8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM6P42456638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f4c413268b3ed44c4978365e4138edeae9fd56f0795990076ec4b714bb6ed8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6P42456639.
If You Happy And You Know It Clap Your Hands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981698ecbecf6758f898c917b7da1e9bd86cf8cc018383d33f9ff33c1abf5664. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6P42456640.