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 0x5ec5df4cbbf9e904c5265ee97d9a1caefb5553229d1fa096d44da4bf476a5cf8. 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/4f2dd575-078d-44ea-9f92-1c425272a392.json and https://artists.proofprofile.net/proofs/artist/4f2dd575-078d-44ea-9f92-1c425272a392.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 0x6f7471615b4bb1644281ce35e1abd6702cdff6c5991a2527b789a94076665127. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTAY2390593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28639354caae12396482f9030e7a76cb8a98f628fba1f3cf2d20cc0f6ddb7911. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:42:46Z), 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/QZTAY2390597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91faeb9833db185df198853fca8de52e2db201b4dadf45bd2585ea5c33fe93. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTAY2390603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957ca5f1ceae443cbafa13e2ed43728419f5c4a85bfc392380dafe3b06ba7352. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZK6J2409069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d6d98df32949536eaa67da1143d4c772f0fac13bd82b0511b206582daf0366. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTAZ2383550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a8cbb16f9516d86e360766747e2b270deabadf0fd8f89511bc784fd10edcff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB22339811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4321ac919d9f85e329fb5dab363bcc570e1db68bea6963b49213edea49f4f9c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB22341650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106f66f26fbe75198dac7e12f5d225e694a5e51525103e979bf0a060a149ee7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBC2336818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940694930b7d17b0dfc43e61c283787d2ff3fbacad88b3b7f6f9477f2d0e05bd. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6Q2403562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe500556e75f74e962de956497033f2ff2dbc9e0c85f67a78bfc8c29bbb28a15c. 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/QZNWZ2404022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96c4706181a0decaed039828b5d1c48edf7007f4c360e015d81e542d7c91626. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:06Z), 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/QZWFV2407352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb944c1006842f8c9babf5e16b7b303261993e38a0daeaa5b5e34ef591235d3. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZFZ62543825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2374952e07383b674181a87e6cd36615a2685e75c5621d05cc889ee4c95b6bfa. 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/QZTAS2535795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2053c8372f22b010eaf70ef585a28b02200c6348ffd60afc5edb7c7e8f03790a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:54Z), 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/QZTBC2514424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7af2fda356f20acc2f3a777e0dd660315dd10e246bbc24a70702e67333b93dc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3EY2538644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b28c64ebf79cf3a22cffddc5408b13e8381f1ff33e662de7dacf89705b552f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FF2588923.