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 0x1699053e0cd2301afdf40f48e6c00506a386fa44a41f2bf4b5428529341fc807. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a11c9069-86bd-4e4d-b848-dda022b0dc79.json and https://artists.proofprofile.net/proofs/artist/a11c9069-86bd-4e4d-b848-dda022b0dc79.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 0xad96da62c81b797db48026367ce8bbcfdd99e76128103682e29476ad0c93b783. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/CZD712100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba0537f3edbd99d9e7ef3d63a429c3fd2efa5d18ce3f56057f92f610b637632. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CZD712100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a81550e6406ad8bedf6f7fc0b7e78184e92c8614b7bd07f9e3f73998ee8be46. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CZD712100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5530a67727468ce4eb538953f2368ce65a8c28321ab16335b3b48ffad5d0b4c. 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/CZD712100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809815af8c705028261c99ac128fc1b43a8375809557e6a3903c994d2df3c135. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:01Z), 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/CZD712100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433d64035d1760dd1aa06f77ad5e9536ac06c93f899a9ceb2746e3444cb84e99. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZD712200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdb607a1bcf09ae8b28d2d9db667469d25f5182f764b1e589b05895db9e4d0a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZD712200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7be19fcbea63ea245facbb87bcd617eec7172b9840f7179e5a17309d7d9e6a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CZD712200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd038175efebbace6fcb561f156c8f935e1bd89bb440106eaca884aebe939e31d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CZD712200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55359d9bca555896b2591ae1293ce257e53c4f935c414d419b8b55298aec3f3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CZD712200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccedee30826490707730fa0c93dbc08e7f7f82238fe6eec9a01002993ab8855e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CZD712200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e318bba39713ae1c89107cd652bbd331996914e43589cc94e15e1bf3489e43. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:11:08Z), 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/CZD712200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05a197c766a4a192b4e208da01ee00f3b222edeb549c6391a199e8d50bf1cfd. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/CZD712200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467eb109f36dffa041128c6cd676ae08c22bdff29002627ea59bef89ffaf3cb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZBK22500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63fe8db289274b1c6c519353a5b126c864bad22375d605d977d532f1358d4a6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZBK22500503.