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 0x21cd0bccc171f0c37eafbcb1a66bd4b7b756e75f83a1cc6bb7cf8b57027497f9. 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/e7a4c94b-3b30-4a7c-a5b9-d15b951779e7.json and https://artists.proofprofile.net/proofs/artist/e7a4c94b-3b30-4a7c-a5b9-d15b951779e7.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 0x7c1ec207bfbaa3dd6c4a7a4248e7041306d23258761287a9c1bc19253c532cae. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:05Z), 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/QZK6H2136899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c81ce6edf253e8da5a352a6b31464ed7085be1b34ff84511b2526bf6f2365f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZNWY2129640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060de2bc4c1ae86150df3933d0565d150302da8b1c7e376088c1a5d0e89f5c1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:52:19Z), 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/QZNWY2129642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a70c3ead3873fcbd0c3e15d30efe4a4b3d7cf81c483c08b4b011e6835708f12. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWY2129645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc1b2b5426432472f746159fd1c0e806f3267412408d820b0ac5487e3f30e34. 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/QZNWY2129647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d5ea81a20400db2b1ee70a57cc16a772987cb34bc8edef57c69a8f3e57c263. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:04Z), 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/QZNWY2129641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060de2bc4c1ae86150df3933d0565d150302da8b1c7e376088c1a5d0e89f5c1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWY2129642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a70c3ead3873fcbd0c3e15d30efe4a4b3d7cf81c483c08b4b011e6835708f12. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWY2129645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc1b2b5426432472f746159fd1c0e806f3267412408d820b0ac5487e3f30e34. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWY2129647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584d0b43984421272c8037be61a45422085a3798afada41a43bb6746b2138525. 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/ARIXB2402107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584d0b43984421272c8037be61a45422085a3798afada41a43bb6746b2138525. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARIXB2402107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9452c6e152c35dff5e9bd85faae0ce9d2aa032a3bbd316970ad668a179adbb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:57:26Z), 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/AR27H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20841f0207fa45b9218b9d3ed708607257d7b9e28058d5c0c9dfddfcac70fdd4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AR27H2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20841f0207fa45b9218b9d3ed708607257d7b9e28058d5c0c9dfddfcac70fdd4. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:44Z), 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/AR27H2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833171f0e61d396eb58986fbfd36ea8a40765b9cc82d06aae845c79a24b68a12. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARIXB2500553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fae4292a4386c5d3120ee45f27b9c13552e1d5057382f6f14b5244ebde8f04. 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/ES8022100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b30cfb225b381bb38971991a7b6b857491d79bc3e1bc69fb542b8d75788b833. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2331567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e25a1518734f291057d96c7d3d64bde643412b871989cca32935d0c566bd46. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARF102400058.