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 0x57b2f876748dbd6684cd2d848d65a86158619a800e9302d1cc3869d78fb2a90a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f552c2d4-a962-426c-9939-86b5b1ad352e.json and https://artists.proofprofile.net/proofs/artist/f552c2d4-a962-426c-9939-86b5b1ad352e.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 0xc132b4a520c46de2a761202f9bb73951fc0486d13c816de98f6281c0ac6ff9e8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:57Z), 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/QZFYW2012705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5ac714f33b11ee1f8a4e788045851720c7ad27235de785ba481742e4392933. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFYW2012706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db390d42780764f5415a4e8d4d797b663407f49c16bd899fc3ec7b7b2f32301. 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/QZFYW2012708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4b1bb58dd7a1f9a1081e6aa142a4264c1bfad564587d315dcc79c5ddce89fb. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFYW2012709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df881febb209065e06045d90b33e931e8f2d4f795414f27fd88745c988a236e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZFYW2012710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc35af47389f9a5c8bc4b1316fc9ce79220ef52792c3f5046f39afee744a6be6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:09Z), 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/QZFYW2012711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9ba675dbc6430edbfff27c169834b9b23e76555016306914769eec9501ff66. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZFYW2012712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91608f7696651a200e23673d4782310d320f5e7482667169e9d7dafc00c23ab8. 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/QZFYW2012713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735d73c1b41fa370e9010d62f56d8f7f9bb6aae645818c73289cac7670710a6e. 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/QZFYW2012714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25b8aa33f481ef427b5532fba25bcbe5a537fce12bed744d7a50414130852b4. 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/QZFYW2012715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea868d5cfaf6348ceec2753ebf22d8e48066dc00dd04018907479aa07915b2. 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/QZFYW2012716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e27bbb6fd4b29b6b5c5058c8bb7ca307ad4f38b3366b2e7fceb78440a7d45db. 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/QZFYW2012717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6e422fb1678b2086578168f0ec6dbeaa5dae76b9657a3b1d9e28ea2f68de29. 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/QZFYW2012718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54d92a31dd4b3f6f8bdbd485d659a5d75c2ccdf526928a3e896c28814caf2f7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZFYW2012719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e7a4866070cf6cba7d39054a37bbaa3acdc5b8a3855b5cd3cf827bfa5adb2b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:21Z), 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/QZFYW2012720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930afe781be19ccced1fc5c9faf06767c498738ee42ebea28f694fc49d9ccc8f. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:53:33Z), 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/QZFYW2012721.