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 0x355f24d376acc31bfb2936e03d2a45f5da0e87a35b259de29603455b6af8b011. 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/b93e6136-5502-46a4-a0eb-ddc8890df481.json and https://artists.proofprofile.net/proofs/artist/b93e6136-5502-46a4-a0eb-ddc8890df481.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 0x1e2e27384b32a316b7cd9d92dfb02aa32ff047d43ab40f593c5d04789bb75ee9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ffa0b0e87e970f82270137439dc5539a98f6d39dad92eb2e44907c9eb3e3f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64857a46c3e0ad6baa5b7cff3867f5dfa13e25d8ac046ac12e7c633418548eba. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d81eb78b4c681a6352f50e44d47c04e11bec88713f7192f2ba6128f359cec65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c51d735f61b7d203c749a7a8068deff8a7cfdf71d61d1b76e39f8a682831de. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20863dfd1f6c4f5870422d49c16561b7d29da037de3422e97ebd3ff2f7efa359. 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/UKZJ72300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c44515a51962971936b23d898727755f2a5d6307a4a9d4fb3cb362ad9c002e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab12af9c6e2f17176043680c0a5ca13cafacbc10856351fb35ad9645dfebab39. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf566257e292846027e71df624445a1a2c46d84bb3264179778a4c7d4e9c3c06. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e6581b172c91d1aced0c768e3c2616dfd69d8d2a8831b1afe8832a6e61afb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108cf3c0bb38a7af0ab651d43e20878d96f0c34561a9614e40a002ebe0ba42e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04219fff710acfcc332e8fdfd86677451d1a231aaa4f55c175614630f5a10a6f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKZJ72300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a6a6dcaff5c32b9acc1002081bae46d39296f899fe6f2f2afc422aebec6cf7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97b0e3b146f72b1ac9cce466126be6d22c39d611eb3d0ef9a9b536a04dd31ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b8ab045edae499a66aadb7f77e70f941918c257222c03ac834d908ffbff169. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d7ca80c75562d090a090b534428493f5581f8a99f1feb4d39caac0c3522be8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeff41e2b9efa3259805b7e117ed4af1f6b6bd173fbee6cc9d47adb2a1b2a21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa8675d47a850d58962693b893b95a831aeef5f6ccf1b152656045129d91ec1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e21107c8435800993690545d5a29f28f1ce90be6e52b80ae9084b1f08dd54b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZJ72200920.