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 0x2deb2e7b5236a552390745876df944601f68f600f92c2c825934c29f264447e7. 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/e5e9ac76-bb1b-49a8-a028-d2c34dcf7d14.json and https://artists.proofprofile.net/proofs/artist/e5e9ac76-bb1b-49a8-a028-d2c34dcf7d14.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 0x2d73632a3840546180da63bb55bd7f42b71fac58b2f1cb9e7fb92ba0378ed84c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GXBDS2308829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9510b7a774b6705dc5d369db6c57986cf9229e0c0f2fd0ff110a35c50db40b57. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US38Y2404575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d1aabcff40071a5550fc4b74a3a894a68e125bc4d283bd6491532612a8e5e4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMFME2314282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29120497197784ed2e4f78466c12ed6c0895c2416b8adbb66af3860e4803166c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US38Y2404566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa597352c9e58ef9693029cc3102314489ea9b6f84ff28e580bfbdb1ab3c240e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2459035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a02b59936187d06aaddbdbf97aa1deb9627f7771b0ee4f0ad830114b8e7def5. 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/NLRD52419170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4e7fc4c3fe990e45015c7ea4c460d2465a5a6c4461c12d401d81044e0a88ad. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/NLRD52419185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294c3e9138e6e72a842ca2375a278c95ef92650114d33cf01de97f31331d8234. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FR96X2582048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2de88b3f2a21779d1f05cfcb17bce67e93a06fbece6c252aff263cc6166b237. 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/GBLV62322105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8da290e59de5159dc716026b0eb90b12d900600e50aa251acb1938c46aecf1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLRD52417697.
Christmas Card (Santa If You Can Hear Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0917db3eb26b5ef373066586db3db1385a78d4476ff8f4f80e3b2829aadf93. 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/US38Y2426898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab89900d5751677ea7451b72ae498f9bd6c682d27227707bc4c1621ddecd607. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZZ7P2426966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d25171e51a41d224784fc267246944b993091cf54fafb3d7d6ae2953f302517. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZZ7P2426973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2dc6355f4fec864006fabacc84d194535c0612a7e79b9f67cc3ddab6e4df6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5BU2569294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e3817a3136efa833cf3588d3a410d82ba2fd30cb5a0b46ac41dc998588aeba. 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/NLRD52417704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f01ffd7a8367133d5992de5db8d601de1c127188c3887ac6ffca95a7f5cd6d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIB2422040.