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 0xa94c274f329669af7937ee8ee9ff0fae20502dc11f95b6ff65f30e58ac503dd2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42eae6f3-9039-428a-87da-6562a4870712.json and https://artists.proofprofile.net/proofs/artist/42eae6f3-9039-428a-87da-6562a4870712.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 0x1b7a3573acfd87678eda95ce6ed894911df74f5f61a516bda421f5dda0bc639b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTBE2341714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9c750e7e44067bc85a36afc6488df712d38b459ee686df50400c57b89a4555. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:41Z), 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/QZMEQ2420938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4b9aa62c94f7664816c76db050148c92865a7f710d2831ef2ad202af589c68. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZMEQ2420940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c239d2dc34d2786bc2dce779800a77b04ed40b5ff6c33509d59a571d8697ed. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMEQ2420946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc030955f205da24235a3794b532e8b1c539d8601a6f606778426c76064fffb4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2420947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dab35a0a9670dad368de47346b4469c6a3081c787cfb043227e22b1b72025a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GRSTY2500854.