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 0x67ee70340f316f7a0c766c34ce5d75ef19908330c627b2590439718526f7019a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d18d03ab-b9a8-4bfc-af78-19c2ad61ac84.json and https://artists.proofprofile.net/proofs/artist/d18d03ab-b9a8-4bfc-af78-19c2ad61ac84.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 0x08e3ef67704f8fb736961275cf3424b73d1377af41f2e03ff99fc2ad73f8ee61. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:54Z), 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/QZFZ62005140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7ff248e39d742e3a077b2afaf5cf578c61ac805ac2a643db80720e4a8c2bc2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ62005146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c6a4462cf3d4bd12277f9ad110c2c18c2199b5a7b48e438b1a5027fdcb24c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6H2049888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480b6ab3bf9109278e0679706fc87c00d7332b2fda679a7003606f70858291e5. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:42:54Z), 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/QZNWU2051224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1c09ca4b697aabd40d2b2406bc204d71c8412a0e60ab102859318b724b3bd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWU2051229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f81f7ca3a2b31219a0fb13a8e378e5a8b34947b9e773903c63eb01faed7c62f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWU2051233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c42be3b12ff55bd92be0823d78f9cd63da984a2d3afdafdb24d40a47c96572f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN42117087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e16c89fd94835e3b969a5b8a9d7144195333fb6a7251db2013d78c26ebb302. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWW2191007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53deb8d768dc7f72083ff47c05ca03b57bb58134be79da7890f1065f5e3631. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:53:38Z), 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/QZNWW2191009.