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 0xd200b5b33f2b46319197fba1523f874e7d8081edcc01a56d711f356f5f73a96d. 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/ea2f1d0c-92cb-4ef3-b4b1-322abf0960b8.json and https://artists.proofprofile.net/proofs/artist/ea2f1d0c-92cb-4ef3-b4b1-322abf0960b8.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 0x876f8d9289ece0e160ea0ce8591361e91f100a34ec9e4075e50632469f75335c. 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/QZFZ32203582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf30e859a3e78ae76510ab4882ab0c0f289b2d6f206bb1faabd1eafb621519e2. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZDA52295366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc070fcc4350a67e6927a02ca799082fcf8e550aedfcb0f7b5202937c1718a245. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:40Z), 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/QZES92297586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0699bca62f37e42308ff8a25722ad165a7b39a130a7f563ca0a14650c11820fd. 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/QZHN42235548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6823727d3b028c40f85dcb48a19ef76468843529c132b2bb7e82939b57c31c3e. 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/QZMEM2295469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69dfedbb83fd3f712497a6be71bbd9a702ba7a6a06d9fe27ac4a58d6cfeb79f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:39:15Z), 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/QZMER2245303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a2b6ab92a9724435c0c4c4aafee81cc33bd18b59ac70e5374d3d62b13fcc9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWZ2236655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee406e80d7b738e826a387461ece6dfb28bf1db7b00b6f68530619711c0ddef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:28Z), 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/QZFYZ2360034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94e1fc6904c92edb71d8d28d32d90bb4962417c0f9c340a42736e9cabd1b36b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWV2317443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ca7561c5342680e4ef017fc56a923220ae8a12beb7c444ff05636639e4dd5. 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/QZYHM2370777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87138a85f82aad1c40bf1e352c2cc4696a145669e63fd216ccacd47347a0e7f1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZYHM2417539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9562f2c1e63317cd4150856cd862b1017661dd67ab4dc3716b564bf91032ad. 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/QZYHM2420380.