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 0x930c98f64fce215cf7ac172448f2e3883c4feab7168d7b50b556aef1dbe67774. 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/3132f2c3-8ea1-4de7-a603-b26d2994d13e.json and https://artists.proofprofile.net/proofs/artist/3132f2c3-8ea1-4de7-a603-b26d2994d13e.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 0x0ad9bc398624bad25b4156f9a7b923a77b6b700f3d2c311c117a002d040fc68a. 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/QZNWQ2378552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e05b027fba7877e5cb796feed99be3e9a46d7e942ec3cb30fdb9986398de79d. 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/QZTBD2330786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c3cd16c3bdd65b32712f180e414d7ffce3099f08bff808e6a88a8d2fd174a5. 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/QZWFH2304504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfd590e60aa31837c3069ed5f43b950c076a9e2f51aa874e2398d29f24a962b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:14Z), 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/QZTAT2499764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2280258a4f8af1efbfc201dd93fa33a28cf5f9743a9c3ca457efadfb4c8553. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFJ2435569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfcd36963e48b4c56732fd573c654172e7313fc83fcc4e229d761fb81c42f22. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFJ2435571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a359c2e699c282ce622acae7bf0456c92bd7a4b7986f62d9dbbeeba3804daac. 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/QZWFQ2475062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89030da7587ddd66b9896ffdd5fbc8d97d7eae9a2e97c508f8a426bfa0987f8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFU2435040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd68cfece0c2b96b09492b131418276e2b5c527aba33f9566896c90bb75c5e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZ7L2408080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c09c33d431167aef1cc11bce8385c1350da0bdc2a37865c72343ce3aeda3db. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:44Z), 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/QZZ7L2408081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe2323400e9fb4ef062eefafe4500b4cbff81b467ac42a344c7e961d5b450d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:49:00Z), 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/QZZ7Q2481452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bd010746b7adadd97440b6ae77c5a0903b8266c83a20d8bfa4578438174273. 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/QZZ7U2414941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124b563408b12be0878089ee58556c74b56d671e762b5139bcc58939e2b4ec0b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F32486603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc96ee36dcdc39d8b165d5ddc8e130fdad49fe5a36f73da62377c4f65a9d2ad7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:04Z), 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/QT3F32486604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfd5dc1a5c6363b5a2e0dbe382b35ce9762d909853c38391595cee19f2cf29d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN82594360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6a6fcd4f31457eaf30210b132f0fe05d204e733938541eb478c725a3fd1d63. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:53Z), 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/QZZ7S2553911.