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 0xe1c57b9f86502677970a73bc1b9374be68b3c72167a6ac8fe9c90d022cae1771. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aa2f53d-60ee-43e0-ba2e-042c00bc6428.json and https://artists.proofprofile.net/proofs/artist/7aa2f53d-60ee-43e0-ba2e-042c00bc6428.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 0x5d9c0cef2b84c523952000983d76b678e9a60f7b9e620d13ee3d0b4222b166f1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR10S1955967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb870cbbc9418a975c6e9a2f7fceebfff0a4228ea54f54d79fe6a707022b8ea. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:47Z), 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/FR10S1955968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fd558a7e2157ed7692a812ad0a3420b3452edcc4df6ac90dca030370c7c0a9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:17Z), 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/FR10S1955969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3080f6900e544622a96c9f8ffc59428c1f35b84d62b341db2a8f64e9d85c1ec8. 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/QM4TW2122813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd8a04d85a57cb46fd8a301a6885868560f12b1ea6b7b9fb0552508bf7ed44. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:19:28Z), 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/QMDA72124867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d98ae9bf29d9c18cb63006dea25533b18663135aa1f77dde50e164dbaadd21. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:57Z), 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/QMDA72124909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255447f19895584f8d5d2c2bf5dfdbc8590c06090c46d3add6d843fae9b5f0bd. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMDA72124916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183c3649a02f52b3eeab5e7c1d10f40518c70abb8958b2b63a91ef15960229a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:35:02Z), 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/QMDA72124948.