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 0x9c000279868354f6dd0624d0c31d14456dc9adeaeda37d239c38fce41bfec4d7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f11a0b24-b83c-4f52-8fcd-43198fbf8863.json and https://artists.proofprofile.net/proofs/artist/f11a0b24-b83c-4f52-8fcd-43198fbf8863.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 0x4a7a27e7be7e949d3e99ed14f971c00ab98c3dc393cac4dc8103ded1cc85e7f9. 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/UKXN22238445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7428053189c5db8f314a6340caac1dac434f126376ff0c5d276c06f7c947218a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:13Z), 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/UKXN22275767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e4ff0e6d691664b9ee04867552e940a88416ace2027fdde02d27e5a0069b41. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX3Q92343179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd032fdbf98faedcd957a0ce9085bbb2d449984c98fec732962a7cc1da1b4fad7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX3Q92384053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe6c1cb6fbfce7f1bdf1990530f92829538e046bbd668422e62ccd129972d86. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:43Z), 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/GBLFP2384418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6268b4138573e96fe45c66f834bbe17b1a35d504256d9016e57c58c269de4b1a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX3Q92425401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6729c2b28bf61a21ce09acbd305c50fcdde4e2229ae396436a559803e341bb75. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBMA22363741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85d0de4222f76f6b1c9277e6769c5e071d6846dcb786c6d51c0dc4938c0a952. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GXF9Q2478155.