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 0x68f1ca2ea5df2b27fba36d3b6d525dc1a00f47ec5d3f8191ac9dea6c3db94796. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71e2abf6-e153-449d-a4f4-9116a2a1c04c.json and https://artists.proofprofile.net/proofs/artist/71e2abf6-e153-449d-a4f4-9116a2a1c04c.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 0x09ddaf434b1c04094f4cc0df373d138c57197f1937e0469e6b828f338c914fa6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:30:29Z), 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/ESA011775011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f1188bcce178a08aac1221be0d7e3062783eef37534b91bdf132d1a2e00d9. 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/ESA011589621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae2739055f3f87a59b026420696d06c3d9c9998029a07bf4c461a9f7c93d43. 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/ESA092216972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbf7b8f2bcef659fff4d261ba9c85460fd9fcf6d895b3769833818e2227eb12. 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/ESA092236636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba75519144d33b03ed86974380b5a1b6c752ed83672bdbc9abd4d64745d668b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2314283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a8270e83ed9e7a0be76178ab90ffd555f759991c3622d182a95a7af65dadcd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N22411471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080fcf378368d07de091ca47b0dd3cb08279be7665a96087ee1940cd8b430f7d. 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/QM6N22415307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cee65360f5ec1401bd861183ab29f51f9f78ea339cd936eaa1c5cd69627c654. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM6N22415431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18c69c912ac498c50113de46a3e7b507607ab3771a10748fb8a027256b8f139. 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/QM6N22415469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58fb983217aa6d9bf5d637f773aaa59d17741938f10dea6f164a088cb513fb1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QMDA62482762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e98cab43c8dc0fd0a55b37341ddf31ba3ae6ec868c6823650943c26577d9a7a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES64E2463572.