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 0x9c5c37bbd3655005381fa07c5b3e672ebaec3f8891d0b6dc79e164167ed5361f. 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/9d1c70e7-6f8d-43af-a88c-cb1ba17fbc0f.json and https://artists.proofprofile.net/proofs/artist/9d1c70e7-6f8d-43af-a88c-cb1ba17fbc0f.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 0x72801349be482f8e77451dcc2481011057fc57088f0159599e93bd9ac5cbf279. 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/ES75E2307089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b3b2044dbbd07a9d479434a6581b5f9c97841f69a07c563bcd65bf38a903b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P42352347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d845b1b313fd30e9a918a12770955302a5a86337387b3b7a0db534e0c82df3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTVM2125486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504a15bb8dfabb55663f02fe2268a352145d88aaf7af95dd5684d0cd23d5bef. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTVM2125487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96eab3410d63c41978bbb64c35c4b67ffc7851395e428e305cd74a6b47c3517. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTVM2125492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbf5b9a034acac0a21b8f9b8eaacbc188c0e360170b77fab77a7949c8bd7f09. 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/SE6HN2165983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fd9106ba75897f81b03a9a33eec6232b5add92e78901b75f490070de912aa1. 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/SE6HN2165984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcb17d1482e0e13deb14291084821853a768500de50172e00c28a63a542cc99. 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/SE6HN2165985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931cce5dd3eb418cf9eff69624b0f75e8b2925944ea05847e8ebe13e198998e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6HN2165986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77453efff790d186d885df3096797d4fa6d0dedbda7b65ef4b7b42e65b4ae9a5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:19Z), 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/QZTVM2125493.
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 0x7577c448342cb94d560f960d177cc4fd222d0f272e9692f6a3018571fa82b88d. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMDA72329183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff28517c971a5d04926873cc71dcf7e0f02dee78bdd054dd5ff160f951b18b2. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZNJY2130463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e6a52b85314411448b50d67f262e197a9c8e7d4f5a35c582053a545bd548e5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTVM2125488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a3ad4d8e6b4870ee90db3c48c122437f32fe4a1d7162d34ca8a4dca2a2c0c8. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZTVM2125489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5523d66436d785014dca1c9615604f20001877e0847edfd1a15cc2b90f083d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZTVM2125490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb5e260d9c88fe88172738fcbc8a3b59830d61888fcf47d28d7fede22edca33. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTVM2125491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531427a59ba44f007134b4b76bf2b7e917922011679d5b49657dd133405fcc6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTVM2125494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7bbfd11b445b4b863f570589c75ff8c1268ec12cf5ff5cc09232506195db5a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SE6HN2165982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e58ec8e6be651c69966ca2b843309a93d382ca0799448d6d82c2dede497b547. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6HN2165988.