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 0x629face43f15a517acafd57d109e35ad7f91fc01b58f699ff5362568f8acd35b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2399d2ba-450f-4c74-ae91-8a8c40bbf509.json and https://artists.proofprofile.net/proofs/artist/2399d2ba-450f-4c74-ae91-8a8c40bbf509.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 0xf4ccdb0c4363661979065b1cbca4d9ec2d02abb5b71c198aceb47d12b6d3c926. 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/QZHN52380784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f1e53aa3111ceb78c5fae8a497f68ed56ae1ad550c6fddea42fa7b247ae41. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52380786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd980483d9d57fc5cb6b3a103716be6e98402ae35202bf6e3c12bc56f393d6ea2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:22Z), 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/QZHN52380787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19264dd232308a2c547a29921021832a091199d0c76659cf478c4ba84a5b65cb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN52380788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a3ed0eb6bf593b1a60ddfba4e3450314bfa2ef4ccfa13edf810e9be511f59d. 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/QZHN52380789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9020f023e2297a21b00b5762a4f0d3f5ec5534b5086dba372b840b538ffb9d4c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52380791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7f84eda6b914e82fecbe9add20f1a8126c4531c7d5b8d083838edf9988208a. 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/QZRP42311357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5be49346eec0e4fd87012680087e4ee330d6274b4ad71c69cbfff1cf2fb6b72. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZRP42311359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9829aecbab70da43395912d2f74ebf7c4b9156fe77bba383db9a5e9fba9df16c. 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/QZRP42311360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9a0e35d9f4a8a1fe6bd78584503fef5ec3761e4f955fe88c94a9110e8f2787. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2441831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2dcec6f5f717a054b6c705a52e086f0d078fcba5387d42232afd5773342af7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBF2436647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2014307f2133d1d2fdd8c4ee53e307c44e151ac33a1e2326361d9dfb95b81119. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:02:31Z), 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/USA2P2529532.