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 0xeef5af2a736845acfed5d41f8e949710929da1bb37e551e0afb8095e08179b2a. 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/39a73f83-96a0-483c-a551-4acbd1c43572.json and https://artists.proofprofile.net/proofs/artist/39a73f83-96a0-483c-a551-4acbd1c43572.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 0x751f35e321c13a74e0ad31c604632ab58a43fe2e6e548594044d2b9a2268fc0d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762131307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13942e502fe21c31dadcdab8ebef84e955f7f0e8cf7dbe89e02e4bfa9432a0d9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S2256391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2694664b7cff7da23989de5c69392ea1077533b6d487e1aa9c7ac92ee8699b2b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR96X2232164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b1448af7e7f82fe12e6218ce739e25c4d095508dc58e1c7f0d61a42735c960. 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/DGA062270193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944ad1310acd3cd5ed8898043352cd5654b3ff8c322ff691ba70fd62e1c542e3. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FRX872332783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef206f3c54b84b23a984f404a246ced1da684351154819b2e7aea7b2ba79ed4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA082340019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95967db6fa3b598b02e973bd423e2ace09f8474f08c019fd4a8f998c23e953f. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/DGA082387583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfa5a219f89a3aa7eb82783e91f7b111fe1807cafbe71835533925e72e591f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA082387584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa51819fd1f8badfda7d7572c023513b0e1c74b320c6d1a4c43a43b2384092b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DGA082387585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055b9beb6970bb59dbca797dc05a5759bda31fd37197f3fd4ae43616a8b939e3. 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/DGA082387586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e7bf527533c19320325dc6420d594c80a284d0601d9d902cd8f1534cc0613c. 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/DGA082387588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf766bffe534ad97c7d4b5097c46a52a15e4be923bd010b10b1c69ddaeb4e7bb8. 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/DGA082387590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb02d1bce790dca053f2f1105b1ca1b444442e39125096b34f6ce916ae9e7b94. 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/DGA082387591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cd312d66ac9940a0df1256200656fbd35d9702ed26461b511caea9668263c0. 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/DGA0R2310356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c08f99de5ea374d8260d8c1375e9f01e5b80d8b7bd3b2cf06810964969073. 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/DGA0Q2435616.