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 0xef9eb13033942f0355f28b3e098dc9447049b5810cf6304fe20778252584ecd1. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5995b19-8826-4542-b36b-b1e4d200777e.json and https://artists.proofprofile.net/proofs/artist/a5995b19-8826-4542-b36b-b1e4d200777e.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 0xccbf87646aff6b818d77749af0e530736afdda75318b62d1233ab2bf13fbbb91. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEL211803705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c03efe2e41d36a77a68b3c42deae5dd574fc491a32d0b8a59ec8b19fca78dcb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6N2287831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2cdc933c4d31f6c22b113f88717133e923025ba37c38b823ebf7d1774aa069. 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/QZK6K2202754.
I Can't Take Anymore Of You - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3c5456284401a37bf381518a0f740b56e607a235d40087980ffc6a91f42db0. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZK6K2202755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc001d21ffd68132fc2fed8381f5e5dcc867558e60685e867832900b3f5c2b3f8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:32:27Z), 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/QZTB62380247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688516700b3e12c90fd3e049c206c06f1211de808578a3d953075a76069d0f60. 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/QZNWZ2481152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b244c76a73fb30603231ad65d2235b376db4eac2ac5a6ff3ece740e5d62162a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:06Z), 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/QZWFU2401812.