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 0xcf09840af7897f121c035535b37533885e3df41a9594e2ed8a885849026db38d. 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/68c48350-0657-4a97-a94e-60fba654afe7.json and https://artists.proofprofile.net/proofs/artist/68c48350-0657-4a97-a94e-60fba654afe7.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 0xbac3e4014d047e82956dc99a369a1079e4371af3facde2f2e2f9c72fe8c8c237. 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/PTES11206510.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad42841d348b39f0a4200138c1c5704a383d56a57db6268f8da91d259723bc60. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PTES11304304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad992b51ef9867a951d91df35709c50bae63601fe48b349016721b8e42e0aa8. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/PTES11506701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf58146b37940816547d5abbcc9e737568f595694a7a61e6bb449f58e677776c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/PTES11506709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae3dc363dccaa13ffe15e347375030fad6c87e37a3edfab89a0c26911ccb16f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:23Z), 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/PTES11701901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adf3e3412dfa8510c4c51ef23ad4e1666c5bb787f9cd3e3dc8df01a99b5a750. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PTES11701906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8738bbac42ff5d6b02f1e0e590482285090bfb1b3e66e0bcb91c97567f1aa40. 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/PTES11701907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6120be26aea9ffa28b7c755c2e52f6c279e60aa764717861fff8335544da3d6a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PT2EO2000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4c3dcfc507c6345bd48e480fffd04c0e83a968128410ce29913e22a8815e29. 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/PT9FN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5108411dbe2e63e419234d44500b5777deb245230d56dda6e13a720a1355df93. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/PTES12108601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e659b8f669d48a46ccef3a1973c8c6ffd436c137aa67d80e4adfbd7129cb5c. 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/PTES12205902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688709970ecce9938ea7c72e85ab5c8196485784a278e62dbb5a592a4d3bd87f. 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/PTES12304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d10f41cee9fd90550b69cfa6addc0211e14687db51194aa678c35faf52c1491. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/PTES12304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e659b8f669d48a46ccef3a1973c8c6ffd436c137aa67d80e4adfbd7129cb5c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PTES12205902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6fa357d659c16d47bcfc22ab9cfc2a7d31afa557ed36a9e9949dddf06faa06. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PTES12304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5108411dbe2e63e419234d44500b5777deb245230d56dda6e13a720a1355df93. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PTES12108601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d0cb0bb94fb8d619fef782f65cf31ed656f693f6697ea07972ca39ed1287d5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:15Z), 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/PTES12304006.