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 0x6c0ba1560d03254ab3a98a53fcf7090db11ad6dfd15de591fb33565cba1ee6ab. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a9787d1-7e3d-4381-970f-88daeff4dd28.json and https://artists.proofprofile.net/proofs/artist/9a9787d1-7e3d-4381-970f-88daeff4dd28.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec152e81d64893a546d684c876cfc15910e69f43ab1aa08918e50e42ba8b8fd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:06:21Z), 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/TCAGG2263139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0efc47efbead943d5617a10c7e13c4f7858c7dd699182a4aee4ff3175f94679. 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/TCAGG2263265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7616219d1e3d0ed91382b0043254df5b2b438738a6670067b9f802e289f4e77. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGG2263280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3854cab065dc52312773e7c396deefa266d14a786279c7af12ac17830d4453d3. 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/TCAFY2188675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682ed881fdf9c8e23dc0e4af947c108cf2325ece044c940638630e1aa14e723d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAGG2268354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0bbbd039d9106f396c07a5b896379987544a14d2830e2ff7df22cbb6e3f058. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:27:21Z), 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/TCAGP2216432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368efe4a93861dddeaf8a30be4088b736897f7bc602dfbf54c247787dc40dd7f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGR2230465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb604f1d7077077ee3d48d2540665123aa1c0da6861676b83e669bd6414430e1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHJ2340218.