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 0x44db6ec5c2218e69ba280d3ce402769a0bdf1ccd839e338381e4a86ba67ed604. 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/eba83dda-16f4-47b5-8192-7797eb2bf677.json and https://artists.proofprofile.net/proofs/artist/eba83dda-16f4-47b5-8192-7797eb2bf677.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 0x357765e15ad249953bbf07783cad8c14d933c3d16e352037aaf7fdcd2dd3b0e7. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GX8LE2439639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f94ab97881eadfae572d8c14173864aa217e1d39cbcdb84b7bcb107495e8bb. 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/GXESV2470516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8a933a4f8bf115197d7d3fb1ea68c57cb59a3c5cad142069259d31d54bd455. 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/GXESV2439211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cd99f7291692d0e598770735b2ce21a87d9d3c2b16efd8ba7670005a2f6cb2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXESV2486673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b036404577f6e269c3728c96904151ffed9efae321a559c3f1f3123152bb8c. 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/GXESV2492130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816ddc65d440bcb7a7598035bda2d5e3eb92ea2c2d4698b45d5251962de56c7b. 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/GXF972481521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e2b2ee779e8a94d740292c8466c32672c1b721d73c911b97cd639429852218. 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/GXF972442265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a0d1fa3dec8d45ab7d48d68d256272daaf716ae6bbdb24a457ec28688b021. 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/GXF972422291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dee4c72d5799fa82a24afe72e143ff6fdd756a60b32da1bd39ccbef0271cf3. 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/GXF972465888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedcd028e958c25234f109f1bfdbd836a0e56256bb270a9dad19a1565bc3e861. 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/GXF972424404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2880c1427e12134201b7420076c195aeeedc579d4df7e8735679acc5271e5930. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GXF972456031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b219b1c178b08014c5b410d49c5468f7ea8c670afd175c77ef661a2d95ab20. 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/GXF972444752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2427afdaf0d373bd4512cd50ed5799b797f5b18f391c3776900f0bc590c45f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/GXF972419129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa77da327b4daab1a84f461c49019c2fcf90d26f46cbc2f61a9d7ed8b7a355. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GXF972477902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618dfaea893090d70c0645b46e16bfbfa77cda1a631937025f544dc447b763ea. 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/GXF972422435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f21debff4f6ea20c804a91fba97f6ccd340bd12b92cc51733bce8935d9fe5f7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXF972452419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc2dbfa3c0443dc9ae69260c3b13c8925ed1b6c90f5431016d9688812687383. 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/GXF972420141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5a5502295a13f4abb1819ca4c824644fa85d845ecd1e9efb9c83d1cc03e04f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GXF972444953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd1d0cc411fadea53d5d0638ecbed4820ac56ad6bfa0ba5e94eb7710c295e9. 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/GXF972404993.