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 0x22f56e30f8a3565948a369f57df787d9e7296260d3d6822d695994fb0b664e0e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3b5b610-8bfb-4445-8686-b5329c3af680.json and https://artists.proofprofile.net/proofs/artist/d3b5b610-8bfb-4445-8686-b5329c3af680.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 0x735e72b7e34906c1f4acf840a725ba0f1ebee6df62aa29fc0e26514b302cb49f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:49:27Z), 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/QZK6J2415662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe79024083cfe15c70eec548398bdac0c5c37e94d97372c196a1ae18779261b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6J2415663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d86d5f0dfe92cc7844529a65c0527870e7e1bddebf9debc9b5abdf3ca83626. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:55:30Z), 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/QZK6J2415664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba60228890bab6a9409c4b0c505197386a68ef3f70809ee292dfb1164b9bef82. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:03Z), 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/QZK6J2415665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9246b7e7f090ef27c1eea787e61218baf384a38f8b028159e5a4269dc702ef. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6J2415666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6f8df6e11b99ada3d155e7781c765cab1ad12c7c80138cbd892a80a55cd9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6J2415667.