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 0x1c67211ea42b9c72b7a910af07dbaf93adc4057a3a89b36cc8023a82c3a06b95. 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/d48f56fd-d317-4319-bb0a-fb32bb57c7f2.json and https://artists.proofprofile.net/proofs/artist/d48f56fd-d317-4319-bb0a-fb32bb57c7f2.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 0x2d3a9f2b5b5d18c0ed62830b151600c696cf6eadab604cae20c364c09155af76. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BXINV1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef338158693ac75157e7fdba6558152c16fd5ecb1837abbcbad3abbdff2a700. 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/BXINV1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6466e7548c3c15b1ab7c8e01af684574f9f0912ef3e7ac3c4db056c3875e18e8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/BXINV1600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e84eae49d5d82969f1d96e6b699e68d441565edba670704783ae6fd2517c27. 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/BXINV1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e198b71d0c33b9e0ee65d43bc379836460d92df2a86dd1abd3a5cb02219a4. 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/BXINV1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95ef99bbf1af5c3aa232a87cbd4082cfdf8eddd9e50df4927b5ec64b47c611e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:11:53Z), 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/BXINV1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7c631ff8da7274eeeae07e3594456bfbd618bcbdf948b02eeb668d27879fed. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/BXINV1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf5bf33b0be604bcd6b300fc2b31cdc23759d56b6a1383d68a4bd140845d5c. 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/BXINV1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f3accbc64ba01173461b5247574c0b20ec763197555b6e58a91e3f5e96a813. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:34:36Z), 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/BXINV1900016.