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 0x1e75cd3e610e3e088033f4d998893c6341599ad7796d1c7f55b4e9956d50ae6d. 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/75fc3d22-28aa-4b4d-b00b-633638a61ec1.json and https://artists.proofprofile.net/proofs/artist/75fc3d22-28aa-4b4d-b00b-633638a61ec1.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 0x5eb5914eea3b459712a9357fd6b82d6972f9a93c35948147ad439fcd11108b0e. 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/FR6V80796749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d871d09314299e4c750649f8e268c6ec0bd3c3f8d759c0b652c392621b26a28. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR6V80796754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fe8a8ef1f8072be06ed8ea3112765fa24167ef92857f2a10fdac31dbea3c51. 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/FR6V81138677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fe8a8ef1f8072be06ed8ea3112765fa24167ef92857f2a10fdac31dbea3c51. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR6V81138677.
Alive in America (Live in Denver, CO, 1979)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0611a5042560a48df4e5919dcc8e5ab4a8e39edab0f510e548f18a6978fbebac. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/FR6V81169497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc447290ecb9373422f031829b9112f696dbc3e6861ad59cfcdd977f3d231be. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR6V81169498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca55cd495e164ae507293104b025ef77e8be4089ac5bf355d14519a739a6e659. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR6V81169500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2687d45371b9104ca183be1ca325714a21155b17e7635c72a2127b57cb6a46fc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR6V81169512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7df94d3a46d3abe606b2668ced9917343b422e6f5c691f59fa32e2dd678ef64. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/FR6V81169517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ae4ae9356cd8622a486f853453d215cf975d613e9fa79819904140bc9b2adf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR6V81169522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044170d51f0d220960b91a89ff81fa5ee77577c9500e46a93b1c0aef42e5ef2c. 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/FR96X1600635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5d203e2612b06a16ae31b7c8c106f63d45673e80507679d017016afabcc0d9. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FR96X1600638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4096da040f76b797d379605c92a788b05f6cec4f40a283995f01867edc4faee. 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/FR96X1600639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e9020139cf5cd819ea6a447f6fab8286c984cb7d118e3dd480f37d5dfb1775. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR96X1600640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3c8857d366c7ee67a3cbba473c5e537e6d42cdac8cede060468af8d0631b77. 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/FR6V80798413.