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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea92e394ce2cb1f36320b9c08d99a1efdc71f5b462dc4f413d091a1cfd504203. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d5f4075-a9bb-4b01-aa4a-913f4924e7e3.json and https://artists.proofprofile.net/proofs/artist/8d5f4075-a9bb-4b01-aa4a-913f4924e7e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Sickle / Spinning in the Black Field
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82cf2bed528846ab2f23e83b3496db0ca744d9d35f70750066ad27f6a60036e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NODER2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c692fb023803836ad76dda43e45e36498e2dbd884032c5e269cbf047fcc1aee. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NODER2501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02739bbc65bc59a0f4b78a81069048f2e0a69c8ff65949c4ab348aee9ecfb709. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NODER2501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2219656323fb5d2bded52ad8e141917cf4014f3fe0eb16a4b4b34f66819bd8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NODER2501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40c997e11d3154f0fcc78069ad958c5973f42b2df312ac176c9136cd1108047. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NODER2501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e6369b5c427713150d54d56fbb248f6b26740e3b82797da4855641dcf7296a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:27Z), 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/NODER2501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e5a422f7b1b7ba93e4a6e8d6a540a96166b3c57c18703d6521e832faabdb9a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NODER2501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82cf2bed528846ab2f23e83b3496db0ca744d9d35f70750066ad27f6a60036e. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:20Z), 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/NODER2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd99634deede63a2de7c7554b00e198e0f08a8d9d81463b74bb303f5d0c70e01. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:10Z), 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/NODER2501020.