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 0xc41a6cb11ae6b0f81120788960d0da30860031a7e73b500f5606459c50a4a9ab. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28c054e0-14ca-4a40-bae2-caa2e35dc961.json and https://artists.proofprofile.net/proofs/artist/28c054e0-14ca-4a40-bae2-caa2e35dc961.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 0x9d00d25db259c305e0bb8b599449968107ebd5b85664328373993d76368eb621. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCACA1431257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d5494fae99667abf15de0602879b161cf3b25c565b32bfc4ab589c16852c4e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACA1431262.
Killin' this Country Shit (feat. Bottleneck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba5512e2f6762db2bd40de9cb82d96e9f934e8602a4d9e2d916c1e9768c79d4. 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/TCACA1431269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f44bcb5b3d20c95f1e0f488b22f4bf1c1e16b905e0c39b98744df96b7f2807. 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/TCACA1431270.
John Boat (feat. Shawn Jay & Charlie Farley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4126516c0daba1e5ca63a74e682e0b78b9a095c6befa299fc6420efad1c7199e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCACK1508284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae13d7a64000f9d5b7af6f48c859cf2c9e98edeb0e0e5122330afb8fcef88fb. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/TCACK1508413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785df6a323f3ed5e25c341e469dbd4d8fb5213d1f08e6e25743ef64f0e0f413f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACK1508414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eac519279377d6d9ac58bd7e5dc18ad90c1e16bffaed70ff4c9267950d5c059. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCACS1629906.
Bass Man and Redfish Roberts (feat. Bass Man Rand)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea3bbcead9fd2fed453e9b3ee2d2582e334bc2cc0620e5bb696900b7641f551. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCADE1790007.
How We Do It in the Country (feat. Danny Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a2020113fb391df19163fa6f8d83b90f1f836dfd12c44ec3071bcbe2e5356b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABU1482579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8a722165d27ee061fa431fa9244ae1bc4f464cb6ada8d67f85ae7bac3a935. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCABU1482645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0549fb0e551dbcf071456cf43a609cbf30c07ab51b25f3d0ee27f50e0b127719. 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/TCABU1482656.