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 0xdb124aab74ffe02e8eda0fd3abb74f3561c81e4942137ac368b6c6531da9f72a. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2678df9-fa03-4c37-b7d7-4bce0d1fd532.json and https://artists.proofprofile.net/proofs/artist/b2678df9-fa03-4c37-b7d7-4bce0d1fd532.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 0x3abc88bd38d399dfea0df7676cf411120aa6ce95510d24900a9d9305113bba27. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:25:56Z), 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/QZHNC2142642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5776d425df1fa9e28ec05ca0a107b338ebb32d660159fd728990b38735825129. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZK6P2112603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0e916aac1ea5f4651e7ab5bc075fc65126cafb74f76fb9b80718fa6b5fcda. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6P2112605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3ec541d12739ded458176214476e0904bf5a863050a9dc43d4f7a0caa4e3c3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:58:27Z), 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/QZPLR2134741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8311094c6a5d14fdb997349fffa9d110ca74d733edb03bb06dbd231fbcdad1df. 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/QZPLR2134743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d34850d520ca62439006183ff16801105bb28e9fee74ed758de5dd5edf631f. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:53:08Z), 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/QZPLR2134744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86370994231c9dcf95356d43b040e918a124db90f34400bc51582253ffd1775. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLR2134745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6413823c5122c195ba8df54957cf332af1c59edf4cd7d00ad336759c1ebc97aa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:01:48Z), 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/QZFZ32245843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4af253fc117ed57917d98cef7c284a7e6c05ff61280a996fe4c0d30b128b5f3. 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/QZFZ32246159.