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 0x3db6a7b55a58004a33ea8d6c19e6ef9e8768c34db81d567929cc4dcba0314db8. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d55ba73d-fd53-4c05-942d-54de006d73cd.json and https://artists.proofprofile.net/proofs/artist/d55ba73d-fd53-4c05-942d-54de006d73cd.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 0x01dab5e7dcda70582ba625b4767f5fbf49ace3f81e70361bbae19b722b0694cc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJV2414124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa43ac408feab74c56d17c2959fbc24672e1a3d5ccf2e61bf70a75e2a3a25c. 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/QZNJY2317493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f80f0bd24cffc0210351d8f8ee52ad703daf84fc3316d4a9cf629b1eba3a94a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:25:43Z), 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/QZNJY2317495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266018932b14915b65a112e71a36b101a79f782d2ce6df78003e576186f404fa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJY2317497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56dbca8fc0c6c75826c4b6efb8070a399a1dee74d843ff69173eae0d11be392. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:09Z), 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/QZNJY2317498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5391f2f48d0064014a0858e5d2cb402c8e204ff79df638142e124038c3072e81. 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/QZNJY2317499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebf9ebe86379b0391be5f2de5c3d39d397597806171d7fd1731d1c80f730dd7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:45Z), 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/QZNJY2317500.