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 0x69dde5fbcaec402881fa35ab0a90a0782e051008611fd060b1d3ec7322c5590c. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e30e932-2107-4c24-b6a6-470258d4b98f.json and https://artists.proofprofile.net/proofs/artist/3e30e932-2107-4c24-b6a6-470258d4b98f.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 0x8b8353bcaeba1cd77b994497c6c5a2f1d87436b71d7dd129ac24616831e55618. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ITJPA2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f359ec9813a983a623ea6ed6df8bdf8499ca730b0a69be7f565d30a863ab35. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:48:11Z), 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/ITJPA2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ad110f3496aeba8027ddcf506ac3d8c382da9af917b40992e26ba1902ad249. 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/ITJPA2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77cfe2bd0378440d55318a9b9356a9413016c506fd621260460a9f8dcf20fd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITJPA2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9402d22e76a518aa8db0c4876b2e5148cbc42dc7134a8e081f74b84cfd450. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:55Z), 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/ITJPA2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8353bcaeba1cd77b994497c6c5a2f1d87436b71d7dd129ac24616831e55618. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:17:00Z), 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/ITJPA2400082.