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 0xac1ce064f847bbbfc5301ef07626dd03ab3c299f21641151db865740816b0dcb. 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/d8828fe7-b8ed-4e13-8e22-ac1f4d50ed21.json and https://artists.proofprofile.net/proofs/artist/d8828fe7-b8ed-4e13-8e22-ac1f4d50ed21.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 0xf9578cd814cdab548c956f8ac03dbf096acc639c3b16cd58984d854118ad92cb. 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/INN632400681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78887f9425fe600c77776ea1d0fb4b5af88e86b43b75215ae89b74a15383835c. 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/INN632400684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2b7e46da347c4e027259eb61f4a97f06372ebbc353c48f54d96914049ab3e1. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CHF032420843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4c8d2c31822c85ce8be7b4eb4a80f650d6af18fcdc6c68f2d677f7e3babd23. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:20Z), 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/CHF032504436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89435513029f02ecfec4d8c120a9711c6d68f7593bed40eeafa96f184754af32. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CHF032504819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0d519a11728114a83484dbcd90b737257056f0166ac4c28aef742012ffdfe3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INN632500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bee13a2dd71c6501f7d876481d3d91994fa1673549e06a2bf54b5c2c7de964. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/INH512027587.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a57ff3bb6ccde381ac9ee5564b04f13fe23de44427fafee3d4c757d5982262c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTRX2532059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2afc7257820c5c84325c5a376499b07cefb8e9d3477f5b6742a5201a1ed459. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/INE182570514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2f2af91beb2d98190d14dc6936065e3817034f140f1a39b94fdba66f82b4d5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:41:19Z), 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/INE182575166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6242ef4c183ccbe4f39725b23aec5ecc0523ff7f3bb206d013ab2ca7888fa06. 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/INE182578892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19155e73d92aa719ce96f2b533229ead4459104f74cc0c0d9d684ed17d3b7d3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:35Z), 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/INT802202295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d14f472bc22d6abef237fd6acb8f38c5d03dd67fb49e0bc789be6f56966f55. 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/INE182581378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425878fb5f05f7d7f36a81c841f9dee48a2b30e2705a08029b0068bf05066592. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/INE182581550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc78addbffb617993b63f0098403e4448b3764c9151551212be25ffc503e9d1. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/INE182581819.