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 0x438e05c86622314d09969727749063bbbae4bc88e1e6c3d2ecc4127cc4e3a0d1. 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/da9bd1a6-b9c0-491d-87f0-f10357e86e6d.json and https://artists.proofprofile.net/proofs/artist/da9bd1a6-b9c0-491d-87f0-f10357e86e6d.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 0x806ecea47a260c19ff96f44143f279c4eadef2afde0f6e0cdb7a8658ba7a39fb. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:57:18Z), 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/QMVRR1700840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e8ad768025774f56aa486c609a4f8ac9f865fbc6a54961feca803893c13ac2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:33Z), 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/QMVRR1700760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8afaaae7ed6068d92315ad4f586219d87ae58a857122dd0b37c0248cf6a389. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/CAM460900561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314189818855e657d1124bcced1e16df0dbfe1d33cba89566c955ea3ed3ecc1b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QMVRR1800180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45613cc43b599cb1e232b2811f48703b02c28b0889221ad72227dfc98e309e16. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QMVRR1301706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef8acb1625e2d08f4ec4fb0b6b380af7ffe807d95db739259bfeca374c7f101. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMVRR1600751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e8170fecd961d11c4d885cbc4222ddfc8cb4ccde2bb106730ded3adfef835d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMVRR1500939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5e3db24290fd9d1ecdf597bdc84b449a34ce704df7aa00cab0bac9ba32b3f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMVRR1402421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d92370de2493e3fcfbbec6181ad1f60efecf97671879e87d34978b0ec55fdb7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMVRR1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a43219edbb64b9f4bd719ebc9e375f9901067772f6eaf638d4e95f02c2578b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:48Z), 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/CAM461001536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9304e7240d2935161bd5b5793f266ec3f2b6c5aabedce3af5c494458b0af89c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:44Z), 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/QMVRR1203770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba118771126518abbf5b0dc0d117a642638670d6f79225af40d7dc9581179771. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAM460901342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa177049299b95d38a7a9026306321d6db7e9848ff908db9601327765c7142449. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:22Z), 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/QMVRR2000582.