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 0x954f3fa725e43fa2323a760a2b9dde6736193956d6e5131b12f816e290df8b20. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87b1871a-d954-4798-aa4d-5ef9fd2c9250.json and https://artists.proofprofile.net/proofs/artist/87b1871a-d954-4798-aa4d-5ef9fd2c9250.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 0x1a23dbae7ac7b49c487f6995fb6967213ac9bb5572598e0eeedf2f653a6af395. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:56Z), 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/QZK6L2501443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551df387a8aacb9f3b9db5bea4294671fa0080a9e0df8697aabb306a2156a57a. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWX2538992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e0e738a69292acb577dd7042335b0b7cc4f4f98b3853e474aee3c58123ea2e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB82591136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c626a98967b4e095809e8273e9f3d0e095a87485eda7fd20802fcfe7054ab4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:26:22Z), 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/QZTB82591137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9faf75c980c7ef7cd2816fde0b82a3349bdc2702b064cce0faf5493c016d9d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:30Z), 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/QZWFX2570846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadd3407dbab5f36f3116202de735e23adc316a7bfdeba20bc9605fa84010ac0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:54:53Z), 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/QZZ782515335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad5f90f12458b0b44f8bc2bf9a44d7ccb2a2b956331e169502cab21c420dac. 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/QT3EX2562532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbfbc7e0df7389e8034c4273a94b35cb61552261e3dafada10dbd25f9160484. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F52557213.