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 0xfd1f015fb8422ff7b1cabaa6e857f12755aa93e528a9b074c95bf1760607c4f5. 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/e49947ff-82f1-47fc-88ff-307c38a657f3.json and https://artists.proofprofile.net/proofs/artist/e49947ff-82f1-47fc-88ff-307c38a657f3.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 0x04cff9c4cc26fa827f111ff89b5ead424744b0de6e5364bdcfe6c7fdd43f00b4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TR0532013331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc0f4ac38b9e41bdd2701352bf65e7c688fedecc422e48ab4869c8181bef52d. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:18:36Z), 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/TR0532114281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41749707c5d239a2eb2e69748b305114fdc814126f8243fa7740c4bab89a3054. 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/TR0532114326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f846177755ec0384f03c81a8bdf77ca321b67ae547621b40682646c32fc1a34. 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/QM4TX2499125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff70cbe4ef19a48c2f8e4a4b3d7947ac920713cb23b24862b7eac81488284a0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM4TX2499126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560ad38cc1fd1b7b3b7312c4ec36d6be132b9a1f73ab063eb8c72b8e88c6dc95. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM4TX2499127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3427773e5322490ef63387c99d607b37dccfc74646ea6849cd2ffe97a3e2fecf. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:10:23Z), 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/QM4TX2499128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf299dc9336ead77f94330a06f5bd5023a4fac7182de21f94c8a879c689eadbfe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6P42452017.