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 0xd9e4f59e36c828fae4f138ce62712f8685bced8d7ea85b8466214c9799501225. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9ef5a57-c436-4fdf-ab17-1ec7f9ba3635.json and https://artists.proofprofile.net/proofs/artist/d9ef5a57-c436-4fdf-ab17-1ec7f9ba3635.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 0x92252e7ebc58f8508591f0c3fb9f4b650d8652a31045470eff77739fb68fbafa. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:18:59Z), 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/QZHNB2565997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b173cffbd61ee52ce621bcabf661363b3ca32251719dc32e7a31ca5a8cd8e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6N2514145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d37a52750034b4ec2e5851a37ac612c29b4c1c350ec039a0aa3da3953cf66. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6N2514146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56467e06c95899d114cadcbc6acf8f3fa2405a702c6878d87a189e2b9eda4f5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:20Z), 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/QZK6N2514147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd1ba7e0fd97cb3a5892cac4a19193e42f04714c480f3065750b259a09237bf. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN52515038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc000a95b6a1720e4504413092d8c6e23ee2b071ef3aab9d5d947854c40b5678. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6N2514150.