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 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 0x8cf72083a4630ffd2b2e940749d7ff9ea260865462f769af8aeec41862629036. 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/84b90b92-8ea0-4e6d-b73d-8a3380a76dc7.json and https://artists.proofprofile.net/proofs/artist/84b90b92-8ea0-4e6d-b73d-8a3380a76dc7.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 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 0x75965703379b7a7c5949a372d39b66868d6540a3d9622b7d188089414e7e0591. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZTVM2538827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ac06ffb0795b880d593d72df2d00ff8aada0dd34c0c5004c0549ff8c61cd56. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZNJW2456023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38dfe30fc16fcac761b51fe94ab184d7032214de50796fbdca1a3ae0fd82274. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJW2455815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ffa1cede190c4968e0d18bae6decfe13d0db5447352ed849ce442cb48f5604. 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/QZNJW2462545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96634c4db3f21ba99804e8672ac8179bc0a05e2713c713bc3d5bbb1eb6593812. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNJW2462821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad04984d0a36d80bb02b57cc67048d02d988a6557288cceaa8340ac6372ea5c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZNJW2462953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bac98992bd982c04527767baf46eb779fa3df9eafe79659ce02316667a719bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLM2575215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152998f3e82363175633d1c2b2941903c10056f2c7af9016ffdddb1590f3da7c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZGLM2575197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032a28fb9ac42252fbe8232bb92ad407742d05c15d8a270cd5282a9b10c5e877. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGLM2575194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92986048d00e72ca8fe40958a8ab4eb7c07636cc4c1afed6b0cb8f957997c0e7. 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/QZGLM2575189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3370767787635cafe456a9bcbac2b9cb5a0be7ed46bd58d0f0ee27d8da7ab270. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZGLM2575181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213b2ab479e261b7a5ab27c000c69c6ea2f9fad915d8bb159200d2ec78ed413a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZGLM2594337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346bbc42aab350aee9216f74fcdd45041ebbc0c6da177a1768fb448ab12498a0. 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/QZGLM2594336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d07aa144ef96babce8236bf8ecfe595abb5501950e2ec5c5710295dbbbb9d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLM2598311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3bff8f78616e42397d09df70370280adde69804a43f30dca5239e579024eed. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLM2598306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7ce3fcbd7ed098181a0582e2ef037e2745af88195e05fcd7f36f486a38691b. 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/QZGLM2598305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a840485faa768cdac86fc50a2387c7b2cd7c60c889000563289fe540fa6fb7e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZGLS2506949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6be3ef6bb52fdfd65f1407f92b6bd910f9f86818d66dc393899c98bb85415e3. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZGLS2506944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f925f9ea68c818c08c66a9c8a3f9d4c85fbd9878b8263f262111e21c31677b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLS2506942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d39dba9e763f3ad379f6d5207f25f1caeab4e3e3340eb7d64e57553e80386b3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZGLS2506941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd1858950665587d2f7cb26b75c726d073ec31724e60a1cff1d85a1c20fcec4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZGLM2576597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf882693a2b67d2116d1cf01453e3d5c6baf44dc4055b21fe80e921e0c61c8128. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZGLS2507452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf3a4ef93da78e3b495b5cf79ff3852314e0b4779877571857101761f5562e7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLS2506919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf319ba6fd2bfeed0b6067660c9535249fb78bd6bf7cad7d0ba76dcb1b13a388d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2506918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4fdfda5555b6ffc4c4edcbc7f3b8e8a6f1bbe91946c120aaf62368b4879527. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZGLS2514388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e93571d8e477abb9b53bd5357ef1d1375cb4f513055a9791efd17a69b1aaa81. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2514386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09af16df16e0cea49769f61f3d6680a04bec4ba137855dc003a4b9457faeb8. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZGLS2512729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adf8be9ec6042a4adb199c2879c0d9c286275a64ceb41693dff32a7405ecd97. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2512700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1581dea0e568a8d37833ab807a34133cbabecacb8f29f81c0e1e108b5fcaf3d3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZGLS2512695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f21b96382169892044297d2aa331f12d160f1e0276fd9f016b8df02fb7617. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGLS2512693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596897711c0cdebb23f801ad7a5464f48192cdd79f607308ff8805ec4352fbb7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZGLM2575184.