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 0xde8c918e975775127e975cef5cea1d8990d0e2d9b7915745cbe1025133d21fbb. 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/1a0402c2-7cd9-4abf-960d-ced68b17acd6.json and https://artists.proofprofile.net/proofs/artist/1a0402c2-7cd9-4abf-960d-ced68b17acd6.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 0x6377ca72476747d1991d83d570bace8e1bfd6f096b063105f3c0fc20bc15059a. 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/USL4R2338696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31edd4222d53b9d1fb8b76d735c6f556e32fdb5c3ebd7b6f84dad6f0c573f704. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USL4R2338697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d00102611c33c05a1319bafa6dbe367d7d7b68dae100dbfeec0625a314f17. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:16Z), 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/USL4R2338698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e81ca5fb6c0cb0dc7309ab79b6ba2fc71749cad5a227f4d45b549fea2ef78ba. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USL4R2338699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7f798ddad67ff9ea7fa923096860e3be58efad346ab9e55620f49de4797648. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:35Z), 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/USL4R2338700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce231299894fc2fc377383a59fe7507a708ee7709012e8f54131e1d4921e4db. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2338701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f8dd626234ed7d59c283f45b4b0d1bccbe7d4b35608db25b60b0a7a7b7a1a9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:31:45Z), 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/USL4R2338702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1ec5cd25711cccb9392237a4516d8ba8ac830339a0f8b13b49e037685d28aa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4R2338703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8772786aadec5ef4a19669e3dd9c34921b714a27e8fb042bf64622b639d6b7e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USL4R2338704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4e560c6d0af67ef955f2114a82aef199f485957213f1023f82b13c120ea723. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4R2338705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf300de8daee42a18e6d59966cf990b62551941b094900b1cd08ae0de2ceff. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USL4R2338706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa978e6ed2f3fb309c8e47435a264ae8d843b25164319ddecd94d7e96a70e57a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4R2338707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7bb984cc035b65566b71756a19750492ac245cca5effec24dfae664a3ac6a7. 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/USCGH2402149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1233383312a0215995ccccd9bb92072d25b40098c8fbde873ae0a24f8e62b3e. 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/USCGH2534478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe8e7049325bfce88322257cefe3b81ab7cc9e99c6745b5b49fc72bac52d921. 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/USCGH2534479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb89ef23e133c31774cbb220839dff828342fb4731a2ad42a2318750258a30f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ2502750.