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 0x73aaf16d2f17ba08e4cb118e18ab20d8fcb6cd1d6b0f07d61783821a7808017e. 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/8c0222ba-dfdf-4b77-aa57-9e5ae4f32ea5.json and https://artists.proofprofile.net/proofs/artist/8c0222ba-dfdf-4b77-aa57-9e5ae4f32ea5.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 0x667eca8fe4d20d79a1e875b1bc53eb2f854a4af0adaccf2ddd6825f09dd18c1d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:51:38Z), 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/QZTAW2355934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724393e333867cb2f1403a50b4c204972baf9666ab0fc8c3614f67bcf3b42ff5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAY2356794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36dd0f66758058b41cde45b62637121e72b50e8ade05b4fce3565b1a0b7a5bb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTAY2356799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569dcda64ba6c0f58240141bb9f93c22fe0105dea29ea1bc0d6c2dfa15c6b12d. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/QZTAY2356800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945d2a2272425df6a29ca29774efe51e99ffee4a9164e47d1c79bd31c64c7e96. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWY2377487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570de8883aef59ab7a64387872273aa62eac0cd3fe245a43d55253ce72976c93. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZNWV2312293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b589c86c97c13d5869212e3c38d337c28eacfa8125572b3c8532108c6e246ae. 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/QZNWV2312298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d308bca120e66263d7c1c578785a843d84ac8d043f31f7fba41f19b25f2b02. 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/QZPLS2316741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2dfc06ef13325a8f7c7aafe13caa7925cdf7bf2249b3d9ceb6b8676b8f3497. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLS2316742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3a3c3e86ebbfda1c63c6b8897636acac1a2ff0f899fdd15517ac5e58209b06. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZRP52303282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f89fb18a63f7d95a4f514493edd3c73c3d060ca42d85696f9d11b2809cca49. 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/QZNWY2363772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ae4433bc847f5c656fefa7da3905a968b4520843bc7baaf648b82b7e353f7. 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/QZNWT2395692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f18592ace1f29d080e5287213d8423b245e600162a726ac2a0c5d0643c1e8a8. 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/QZNWT2395693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ac87947a504915ae687da3deaea7b59e44d11cd038f57fdd03a59f679ea964. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWT2395695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026f8112cbf21b1078e9e38fd05dbc023ba1a7299dcbb9f6abcf2437fd805c3. 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/QZNWT2395698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d6b32a0ff561cdff1ee91d7243f4fa7dbd0ef9cd2204f13a1b89b1ad2f19a7. 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/QZNWT2395701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7116a9a2b22ba73718a70c7b7446ffb8f5eaff8c01cf12c70643245771a813. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWT2395702.