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 0xdf364150e7176b1e99f08fcc87210b300aa96fa19302f4e52f1e70475358ec2f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/748e5d95-3ff7-4c44-a754-b86ccbb0869a.json and https://artists.proofprofile.net/proofs/artist/748e5d95-3ff7-4c44-a754-b86ccbb0869a.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 0x2460bde60e6131576e43faa0b0bce6fc6156dee19c67a6b25e4cd2112aeb6dd8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2085168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e10d05cfa570df8f4f129a97af74d5ebda60872dde528d2d75c0f086b68d83. 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/QZFYZ2085169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51760076eaf3b8b3ff62b8cdb19c11b3f50a8dfa9038a15a7bcabac8fb3dfc7e. 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/QZFYZ2085170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ef662b5cdfb078bb2e7659b27a43de1ca9a9957bc8be177d5b4a45013f752. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:05:27Z), 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/QZFYZ2085171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5e0f1f9b76c2c03fb7e4f7da1fb6b716506fbe12f82fe5f99eb330c752c06d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZFYZ2085172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769bd3d49616e033033670466908c285b1609604a17b67764dce35081c302a41. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2085173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5ccb8df73d0791a094776739215f3197d232813279d6eca92d924147d5623. 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/QZFYZ2085174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18878ccdb394f80d3d733cc99d74eed705089b84a699bb278bbbc12f21d1128. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYZ2085175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fceca3299eff4a3bc3c7b32003a0f0a82ccd209eb2184e64ea1302adc883372. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2085176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c5a9c1a24fab5f9bd291064879fe0e23892fec45c4549fcf41d5d02946b09. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYZ2085177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2f8d5ff987bf6b672cffb7f3db70941c55576ec5be3bd779de16786bda9e7d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:50:28Z), 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/QZFYZ2085178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0078b39657b58640646d1d84a54c1b9a6d6ce8900c96f46d43ff845539f263. 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/QZFYZ2085179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a826f35f5a3159a7987e264de8aa9ba3cb1e2d2fdb7cd173034b3b237fd0668. 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/QZFYZ2085180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d66b523466e48d5a8d9bad54ef4bc095f50fc217001b65fb7fa7bb9a6458f35. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:34:35Z), 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/QZFYZ2085181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073a6a7a7fb102d11f6b46a53952e67373bc39a3217589d6457acaaaabd4ecdb. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFYZ2085182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3a3c88db7823bf0c36e556463b377ce37e21a7973f01cf3ecd63b63cc3a2cd. 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/QZFYZ2085183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f912aaa708c452d829653eaefd14a70ebcaf0f62daed42d2731302348d9cfe2. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNWV2092510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d108f4a1ebb6a8e00a9e431d3e4aa9af427eb706d591034289e8fc4f6577501. 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/QZNWV2092511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea6f53ae1a7bfc286d56f27c1e4863817c9aa289f9ea44787a27f6dbd50b26a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWV2092512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05928dcf0f520c2be6cfd49395b773aa53d212191669dceee942703aef262c97. 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/QZNWV2092514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84be510601184bd97decf15c6ef75da5f48072fd5f0e8263f1488df53de932b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNWV2092515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc686a197ec00e93c052ee15664eeae003eee55d65c84f472c7f4856709c74e4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZNWV2092516.