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 0x5c5d95706007a50644deb2317924fd0787f3cd59710dcf536a7fc41a3665bca7. 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/812e28aa-335a-469c-b585-c2f0b52b57d8.json and https://artists.proofprofile.net/proofs/artist/812e28aa-335a-469c-b585-c2f0b52b57d8.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 0xf36f78079ed7ebfe9622bcb1874109ad252aa08d4739eda5016df759e946d30f. 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/QZNWT2001312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70da36be62142ce54c4e275667f39b1fc18d44b9b8705866e4664ea2487dc325. 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/QZHN62161844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36f78079ed7ebfe9622bcb1874109ad252aa08d4739eda5016df759e946d30f. 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/QZNWT2001312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ccf092b6fcb6e2a361a86444161b56cf770b74f054e987767c355f1723d48f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEQ2044409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e2d5b3a04ee24d59761cf9427088e2eb566835adfb3ee8dce0ccb40677a577. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN42153537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb90744a1e224f1d0b5d9eabefb3fb4e3895ab1232fa9bdb939d241b852ccf71. 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/QZK6F2069747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc47f1b1219e46087c15594a83afa158dfe85b2fd53004fac4511cb55c69c4e. 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/QZNWX2173949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8314dfb90d34a2f4900ce734991426f62a45b88453e14b8b067a9e09c308f099. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:06Z), 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/QZNWV2133358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60563b65f3f51ef7da843ef5bbe613cdf52593ff394cfeb2cbb1107d0d990788. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWX2173951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c64502c1d7b2a6804c9e69e6320fa7901197290c6c025f21edd6cdfbb42360. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:08:37Z), 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/QZNWX2173953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a251e043a9df7f8406a71ffca524d2813879b34abbd9e35c4a2d910ee46a330. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:02:02Z), 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/QZNWX2173954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76443dd81929f7f8fca9077b3660b65d8a09c90be97b014fc747368fb6bc3de6. 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/QZK6M2137867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aa90c4001dbf72fa9a202e5d8b857f804d3d91297974eae66cb003764263b2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWX2173955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea994323d85e2ccd75ca2a13543d11a8cd26a0b9671648bd2553d4c75be7a5bf. 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/QZVEM2393082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbace31a68d4e04dc5f3eff6538079c9ab54f7e25bb19f60b104b33915d38acc0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZDA62442686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcff944160745d29d6382cc50e7f76f2a3a59667fcd38c48afb4450eb344cd31. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES92457557.