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 0xac2a36a400bb8586c2a46e24ca5e2cfa4bf1d09c0cdf040be7268952e222b491. 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/4ebc24a3-62c6-4bcc-8ad9-d5cd95dbc55a.json and https://artists.proofprofile.net/proofs/artist/4ebc24a3-62c6-4bcc-8ad9-d5cd95dbc55a.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 0xe511d7ed57106e389bdea9320cbbe487cf3d101aa3f0cf445322303cf2edd566. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX452201934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7600c5a0ebc324814c9ec1ce96bcafa4cd4cb615ee1ac4afdf940791f4196f71. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GRUM72400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5ff9d5536339f68c035ba68ce628f0a1f40149b74a50cceafe08665b4c8aa. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFM2459208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bddeda7dbaca8a6bc77e3330d3638d2032093bb634f6a84ca04865c0482bea. 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/QT3F32440923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59508de71f956887562588e184a5712325f65401ac5e00e188b3478291a7a317. 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/QT3F32440924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32b4828c88c534b4c9c898d60aa835750ccd8192ab85bbe244e5ec0077c6c54. 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/QT3F32440925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf6ff99edae0efac0bb1165397a1c9c9d8cfebd3a459889da0537d90f40be69. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:58:36Z), 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/QT3F32440926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedef5cfd0515f55b35fbf680d9b53bb8fd0a5182c14ecad8871359fd91eb5c21. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT3F32440928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b4be36e4171e58e89832bd050147a47ccab999cbd6e2ea09250ba9837bd62a. 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/QT3F32440929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed80321b39314775dc5d0bb4d95f880db6683caa672e8ff967ced9fcc04e70a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ792564379.