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 0xbf6d28085bf04bff8e9b41d2ec48b236610eb90bec9d2f76f7264b146a41b575. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18027f09-a1dd-43fe-9e0b-3668289bdba9.json and https://artists.proofprofile.net/proofs/artist/18027f09-a1dd-43fe-9e0b-3668289bdba9.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 0x2e4d82324386a1280178d49e9ffe47fbeeebb55db655c14691e0206e8197f1f2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN62533616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943040da4756157828dc1aa44e10c49062cab0478af677898504b726f4ab96d6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN62533620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754a57d7014dbc1cc8ce9d59a51fef0f06763f0ffc97981ecec90471cd71caf4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN62533621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff03dc2cd5ce2ab5d956b6a74be85d8f52355216722d478def3346122cffe74. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:42Z), 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/QZHN62533622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97821c2bac30f57e4e1a23aa2d4be68ee30ed46f097b2812486f61688f0b1c4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN62533624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eb83461eeb2ce7515d67279671c31e673e62697b014cfb646152d2c6c922b2. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZHN62533625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef135c1b2c3c3831472bc404b03a116ab3e1241e381f53bf6813ed6e3c2e368. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62533626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab96b849ff03bd1fbe13ec78c6128b09ca306b16b2644bc9d0ab371515cfe67. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:21:12Z), 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/QZHN62533627.