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 0xa35d8edc44bef97815c29cae609f2bd7d88e12a7b522bd6a12b67cba5d04b501. 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/ecb5181e-0467-4257-abf4-705a316f52cb.json and https://artists.proofprofile.net/proofs/artist/ecb5181e-0467-4257-abf4-705a316f52cb.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 0x830f6ca95b52c4260f0337bd623793325f7dce6751fd8a018cf1a373b618040e. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QZA3G1700133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d36576f637c0908baeec32576df0ea991672922401e9334a4a85de5b0d57dfb. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZA3G1700135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a3a8c93f400554fddf1329d0419cb7d848f95a9ff8270953c56b7cea63caf. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZA3G1700136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a7c966cb0e95deae50bc7219c5e4d79e871ec992e9c2f104f1a73e8a668371. 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/QZA3G1700137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8a42fa26246198bd12f556232e295bfe18ea1fc32c9d42a6d5d00d9fae18ee. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:12Z), 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/QZA3G1700139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc90124afbb574ee6b9f8fef7858ffd102e6432e9f0b75d785a5258aa09e48bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZA3G1700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dc55ae587c437e967008a9562d27fce7d41be4b16ff2ed8eee70875cc9c5a4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZA3G1700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58143472f3c5b0d57df812f6687a73f589f620efab7b695be765a800af1ed020. 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/QZA3G1700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f04439f438e60f152be302d6746f4e7de87684abfb8f6b2d876d6612afcc88. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFF2303373.