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 0x587f5e69b8454a6aed5b66df7cbf8c6230f3fed9b458b945fa5e4663f97a0aa4. 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/c9b38457-073c-41a8-8447-e07887c26f7a.json and https://artists.proofprofile.net/proofs/artist/c9b38457-073c-41a8-8447-e07887c26f7a.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 0x76fb75a108e9e884c185287b6a08e65b8fcde354151c24170a45327595f28be4. 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/TCJPG1723948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419f33772d17ae6aeb07df63c6174d68dc3ca31f4e11bfa1e805cc750ee972d1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/JPY202100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda09fb6e7046c104a9d62fa113f0b55af8cc91cc1c828efa67bd66d737b2c47c. 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/JPY202100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe575e7cfc27d8bee3a2f743c80a6169afbb433d21edd16241c08de69cdb5d2. 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/JPY202100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da6fe825209f3a89cf1e7ad0c80c727dc630afe44146427ebbf4768b35c0229. 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/TCJPS2213612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebc5fc92a1ba9ddd7f30a1fb5f0b4089cdd723b9d194f35689f9014c8e45832. 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/TCJPS2213571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964904c3abfed4cf84fc1bce1581a63c498ff630eba63a2d498ddf743097f970. 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/TCJPU2376907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a4dc8eef005b413e458a1f77cbfd4903b70b7966007c53fa7f9d26b32167a4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:50Z), 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/TCJPX2397549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcbe1747d34f51065b2666a66a8eb00e62bc3ccd6baa9226dde2fba10e1d99a. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCJPC2498668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e23a13b6492aa3704992886913e647078512eab42b6ca476b4729a011af3c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPY202400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7060dc501952232b12130e822e12246ec4fc515076363642a3276bf73d67ac5a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPPO02501081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9780f2b4157c2c35b23a25e939e33d0712f5ea077d5f055c32c035a5373b56c3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/JPPO02501082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007b418b1861978cd4388157e4e1fcc206483505d25d6f062166487f97fa6898. 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/JPPO02501084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ea0ba0d96457d785df546a1da0135fef78b27fb02897e0072f18b34db0eec8. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:48:52Z), 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/QT66K2549745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae23fa163444200785d011620bbbe5840c3679a7a045ab24822f3231c55165. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPB601900495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8e4f03cd839af85e07721f8265e459f0ac6b413c85ad493af99ec08942223e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPY202300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd59b29e01e9234ca9911005d06e1f09bba02ea6224679fdbf84780f8e5d988d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN52354044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80f78cc980a6b1479b58468f298ca83c549c662bacb46a0c548ffa86b9a3c0d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPZ2455123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d299d8bb4544b6b87a0f6d0e9b831b709c4846752f52207b28370c677de09c6. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/JPY202200316.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6df56ca68027072f913a514bbb4ad27b7755866e6aa82bfdf5f651c7d08154. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPY202300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeecdd2623db45f72246b583101d284c6821fba00da5c871f865a5427a7e1c4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCJPA2405180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb863b124bcd4885f262a39f9475909b9f554bc544c72b642a7e24e399a04bb31. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCJPI1994535.