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 0xf14f88bacd89c8009164fe6d741f38f843ecd74c0cb5d59108007ddff5bf0bc0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0606f349-cd96-4880-b34d-dd243e450ee3.json and https://artists.proofprofile.net/proofs/artist/0606f349-cd96-4880-b34d-dd243e450ee3.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 0xbe34ec867b389cacc7d15490794a708e1d0d73bf70e3e3a4e67f0e4dbbd18321. 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/QZNWR2136544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703c0d95100f70bad7e59a168f722e80102ea852b66b3bcb29735782653e5ca3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA82243503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854bb99832de91a790e6f898c89f26bca9758d5c1712b729d77692e0b953d3a2. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZTAY2294385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac0ea31f84e1b84e44e0adf52d895e45ff01e6596f4dec6bac99a80847431c2. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZFZ32331884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6520da40a29d120674f4e939642a418249ee051d4481057f1d162ed74a9bc1a. 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/QZFZ72240570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65990474cd3f43a7815c5a0e86bb28a6fe6b3f62ab46aff00b7e672e950ce142. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:32Z), 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/QZTB92241086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55826288d39c848f2d8c57823e46652b685a0ee363830d902a036ba8a7157eda. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ32331890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c44ccf7fbaa76c6dd618385280ef15aea644ca44dbdeb13a871f77382757fed. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES72386959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7684898ce5be4035509b173a3c7c53a674d21766d83cf5e701c7a47dd84376. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USLD91745373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f490b68aa05931c12917309fca2bf303bbc7719d834288fd00359e674598441. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/USLD91746730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1bc116c88c01c55bf4a34b883bed9284e18fd3142acc9c7a6e9d53a5d395c7. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USLD91751867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100deb8e5692bd4d446524c1affee079eb47e043defa170f4fd6f2e8405777e7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USLD91751869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2b6ae5f4270babdbebaa5fa2b82d546dcf4d69693688488ad877b7a84f9a9b. 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/QZFZ32536605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ab17149bce519f201505a6e06f04f1fab7df31b10ceda500cb862e0f1eb8d9. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZES82571741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a796b4c89789d1674380742148351070cb74b659f41e4086cf385a1270f3a1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:41Z), 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/QZNWX2596366.