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 0xb823e63eb9f4e22ff77eb9a08d09a6a5250c0c0692d9c8fc2aad32b9bf51cd2c. 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/1a7f44d5-7412-4b8b-bc27-36f1b937da94.json and https://artists.proofprofile.net/proofs/artist/1a7f44d5-7412-4b8b-bc27-36f1b937da94.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 0x97d688fe0f72f979bb87a1e07caf6494cfc840db90d867fc2312bdd37aed65e3. 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/QZES82300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b3d9dfe0a2bb9676d5d6beba751322f1d1e53b77798a7859bc1a78a9a8dc08. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:53:53Z), 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/QZWFE2345160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dad0fabcf5e0e8c7746afe888274cde17baa9502a646272cbccb396843aa62b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:50Z), 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/QZWFF2337111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8521b6a36fe838de98b2254c2bdb78a067eb8954cdd43646fe126fcc75f0f371. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZWFE2388193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d8720d025701dcbae1756653f61d0f7c7580948662c21ecab3bfa54ea5345c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFE2345152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ab83b1dde99095109f89288bd6056e36aa3e2262f5478c2f4f5e25f423a452. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:41Z), 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/QZWFE2345157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa086c9c2e7e368d8abdf5cc8a0a1a3dcc0224fbf95400c868e199bc0f07bf3e9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFF2337093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf35525a98251d9fc8db85fe74460c5e5e59800fd06f538b9abd49f2dfac96. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFF2337091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e0febb96d6fe7d123a0023c8a9f6c07c7952733191fd336ce6a275e55fff99. 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/QZWFF2337095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1430bdb35ed57373c51448647fc26de6df5439b4a4d0739ecab195bf683c62f8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZWFF2337097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21d2a1feb6869edbd981910e8beea02fd29925d2d5a0021039f5be69b9a6005. 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/QZWFF2337105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833eae80615919489da7bf2f118ede969561c081d58167122c5f830a35f1ccbc. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZWFE2388203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3eb36833f50f9f27751222b9a32f5906c45bead9c3e135378eeb324a6527a6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFE2388198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608d1e8cc6d58cfde5b26e3f596af1e746b37bdb5daa9dba4b2a241b17a74f77. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:21Z), 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/QZWFE2345155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1ed52922cfd6b624c7c1f02653225e00a4c966019e4597b11fde5f0cd28dee. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFF2337108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76750d313d873bd382b6de672bd43b8f78a39a7a18c1b1cccfa0e3d8b35819ef. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFF2337110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3958e97088166d21b9169a54130e6015a418184fd3bd783c8bc51d56d37859d3. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:24Z), 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/QZWFF2337114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e308827b270987fd94fcce79ffef213ac6988796673d01a83b564a7de5a0db0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZWFF2337118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384ae69126987480cf44262db9f067ef337705f239559cc9e0830787117e297d. 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/QZWFE2345162.