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 0x3de0240cf3b4826bbdf5f998da527e48cf147edcb1651704f7c01db421a9746e. 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/36373049-c7d3-49cf-bab2-1604cbd3524d.json and https://artists.proofprofile.net/proofs/artist/36373049-c7d3-49cf-bab2-1604cbd3524d.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 0x83ce36118b1f6d36e2f5d5cf13e5e7b41f9608dad097b0ea5e7a0277b085b4bf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHZ62234814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33770b0d0f7d5c95dcec67ded4157f86f88787b9d68cfa247e3f0e6b3133bed9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNJY2281055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd274ddd02e06ca90f072a4d8d47838d29f552b7a7aecba66130958eacfc3d6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJY2281067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a03c672b149b156d3f305dc43397834524ec170930bcc3dda719e76d94b375. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:58:35Z), 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/QZNJY2281057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7426997c10e117699150e0714f72c5c6b68305ec871efe0784b9f47623040c7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:41Z), 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/QZNJY2281059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc8b4779dc01eaa4253b802ec0c24cf5fa6f47f2da02239955c64a8e4dae799. 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/QZNJY2390355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e1b3a44254bf06715bc3742af945609045e60ae9f974b50fc1613873650b5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNJY2390356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0b80fdb307eb0cf6e9e38ea1c462166c4383b042833e7bfc84cc55ab342816. 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/QZNJY2390358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbaa9ddc3661c0a8ca60ba8157c2fa69d07d998842150c6a13b44787921e35c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJY2390359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb78924c0b5df2478ba6a304822cce49529604e259418df3a4e04c0f4ea3825. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJY2390360.