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 0xcc2dd76d53a730be796f0a2cb905e16652b1d726ce3ab6cc7f99bfc2d0939871. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec579cf9-1c5b-4154-9aa0-e488f6147c12.json and https://artists.proofprofile.net/proofs/artist/ec579cf9-1c5b-4154-9aa0-e488f6147c12.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 0xc825e906590c70a8044db7f62dfc2dd8db85ad7c733b1da9ed222cb455ca03e8. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZHN92531498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda011cfa4de65690794a3f7845040d8e9ed11888fba88695f7f44f31edf0704. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZFZ32565214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2814812cf4e4c769dda716f6a066343ac37376d51733bb6448788662665935. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFYY2598299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc980981f86d5c1a4f4823b337abc53909bf45fc341637a4154b98921329bce6d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFYZ2545022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaba351c20525e60601f33cc29c53a5fe782f88fd1d845720e877c3c68a9e8d. 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/QZFYZ2547081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25a13193991b38149e5cb5f24b6e8bb2c20da95189f1c8631a04af02ed57fe8. 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/QZFYZ2547083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff0fe3a3837246f6d4bc1a0097d531e7519d67128bb0285a9ff0a1f1705ad5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEP2537567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb2a61ede9a396562c9a0cc2006d0bacf3baa3550e34674f9732d38b6008ec5. 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/QZNWT2515064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a7675916b72ace8a636c03e95946c21a05f6961ccc6501084e2b5d7600922a. 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/QZWFP2584532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccaad8a0a9e73e720a695d605150ddbfe47112929b3a307ad2bd694d5b9f395. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T17:00:51Z), 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/QZZ792583200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa783d5987db2a7d2239dacaa7d1672ee536855f3c7c7d137ec470c74f7b95011. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZNJZ2518377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9ba8c39ee46a119891add667d3ac402703bffd1fb11242efa522676e1e918. 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/QT65Z2534335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d51c323326793c7fb2e3150f01e536ea65ceaf94d7387f8bdb0f7086779f1d. 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/QT65Z2534499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaaeaabff5a9f8ebcb47a993932c40969dfadfe8dc11c73272c21d48dfd101b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:44Z), 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/QT65Z2534512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a95d92c4154c826502bcb92dbeb8e66a3c03bcb4f850bb19d7ce507bfc799c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT65Z2534537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384b2ebe333351d03f60e4b78dcdb6a11600b5766c09198bf981f3ad1614da24. 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/QT65Z2534551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd498028973d1b70264132e61fc398251115022f4ca49762079287b377665e28. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT65Z2534568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ee20642574df41afc3738ef14d40c751afde4080bc87765bfb2b507ae5b99. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT65Z2534617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67284ef6dacc35f48aa7986599708c689c436ed0232d72bc5ac90aa3b7bb2776. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:58:23Z), 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/QT65Z2534638.