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 0x0ae4fbe906aa36d2f67bd0b654ba93a163d48c7d16aef26770df1e1537be998c. 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/9a02ebe4-53e2-41bc-a508-cb351e472548.json and https://artists.proofprofile.net/proofs/artist/9a02ebe4-53e2-41bc-a508-cb351e472548.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 0x3057f6a7d5651e06c633c5c1919c74bb7d9b3d664d05ee84a9dd9fa5af24d440. 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/SE5752149941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45489239460805fb9c97ada1b7e6f77093fac137c39b7ef7dc08994864180f6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:32:56Z), 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/SE5752149942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3c7171f6f7d63a481861524e3c60c36f0777bcbf12724a4d7a3faa75e201f2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6XW2394620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea31a2892bba0a8272302e3143502fbd6d29344c983f6b0a76c5b3115d54f64f. 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/SE6XW2352498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c66cd6b924ed733b951c979988c94cdff88b3671fa91825978301b0eb84a415. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5BU2442068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9422a598b95104361724aa1a476b27f9734fbfe2c8e284b3603b5b20faa5ae. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:36Z), 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/SE6HN2417825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0028c11b6d601871485aad948ef91f865459004ea0ed8a8eaf74e8ae9de76a44. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6SA2425048.