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 0x8acba62b211ed6e191d7e118ed371d739127c8f46ae49cbb0e3f29dd32be5a21. 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/c42f8ce9-213c-4676-8ce9-7ad1dcd81ffd.json and https://artists.proofprofile.net/proofs/artist/c42f8ce9-213c-4676-8ce9-7ad1dcd81ffd.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 0x1711b9ffd7156f3c1117c85fa432a9f2a18e01e011e8de257ecb2e39007a48c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN31941988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b5e9df34f556ef546c9d06e85113cadf44410437a15eb6781bb279fe7839c4. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHN31941993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55229a0b668703e9e7a1d6224e5f0db931c08eaa30ded39e12f0aa321fc08865. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZHN31941995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad749dfd6d4d7423a9cad96350109b748059da3807110c7a84992c7632705d4. 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/QZHN31941997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cabe07dd1bd9bd4403a7a8e6d10bfd206db1999897f8b8389202a73503a0607. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN31942004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2dea3a2ebe4b739c7a838ff10bc83bee4f48c0e9685975bbf66b3f42af78c8. 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/QZFYY2067612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d46323d1b321906800d18dfa39d08b5aea4daae4de8d2748d286b0bdf8377. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYY2067615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b93a0b3ad035a88af4019e1392d2716587d521ffc0160472ae8bb9112127997. 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/QZPLR2092936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce92b7b3a11da36aa32e52c0bd6b8a89a371b3cbe1ad6082e926911323943d7f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:56:15Z), 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/QZPLR2092937.