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 0x128f6027cc3eef862b32bf7e2e7ba57a4369cc0b30f4d8ea60fa1e6c53f9f646. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f8c3293-fb0f-4753-8ab3-28f94e0bac30.json and https://artists.proofprofile.net/proofs/artist/6f8c3293-fb0f-4753-8ab3-28f94e0bac30.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 0x8ec39e2a6c43d1667eb4cd32f9e274430e6690318ec973e90d29f042168de64a. 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/QZDA62190642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c24b85a4fea0190323b71be2a6aee4b278c918abd5874829a6f70d8bdf5414. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:44:14Z), 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/QZNWX2277425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0c87ce90dee43a6eb48fcd1ae7239a936b66646d7a35dfba3127d30080c8dd. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZRP42227759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06ce76d677d3036e7e60c1ba066731d24cd4ed9c43ae6b612b44dd4a8aeef6a. 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/QZRP42227762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b30cd328f14a0436a57158684604d52016057326bf2c5b4bd73dd519d5cfa31. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:28:00Z), 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/TCAHL2377852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58dc80112d68478e6ae9fc22f02adb2b0a7ab7e138dd998509dd6e443f37f9b. 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/TCAHL2377871.