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 0x94067808ce7cde223f39f8a499cedfd0c19eb71d7b1da0b2f1418111e341f3a8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddd25a52-ed9c-4675-bf89-0e464a142615.json and https://artists.proofprofile.net/proofs/artist/ddd25a52-ed9c-4675-bf89-0e464a142615.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 0x3c88b7e3a0f754ede59f19c34d2143e20cae05e7bb4270c09b4d5508804a63d0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMHP2365345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddac955211829ab2b36fc2866387c046ba61fc71f8819d2cc2529830daabfec8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM42K2200951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd088a99ecada6802166d660028c9f0b6e145c40552d2f3387b938ce4ac0003. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QM42K2480567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3aaecfc815b88fb7c64c0d6834775f296a1eadb4bbab996ac3b56352a97774. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM42K2516826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17774918aa6380c9687f915bebaae0443f122a1d1c3c06ba15da015ff8413301. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:42:08Z), 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/QZS632520455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e842b1153e2a313a40ac573ab9ae7c34f08757b803320de5c63953a7da537e1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMHL2540668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f34696bcf98e7bd62da0f1172b1466db346106c3333afd9f53a3f3095297ac3. 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/QZMHL2559998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fac85b7c9fc6208885fe637e51ecc5cad9300d1ae20ec704d7c3a04e956ae7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMHP2554277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece3917eb8a8411a061dc8dcb84378a9d5ae9117176db7ab5a4168c85f02894d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:57:50Z), 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/QZMEN2534431.