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 0x6dc1a029359f684465100e44db332316164f37c84cb73e1b0ebca0708b7ea284. 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/98a236fb-ff8c-43af-a609-a91a5a99ac0e.json and https://artists.proofprofile.net/proofs/artist/98a236fb-ff8c-43af-a609-a91a5a99ac0e.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 0x4f29a634d7adb183420a0dbb460a146ab60b24061f05ce0f6183c06858b77058. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/SEYOK1513444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe251c491d334a06530aa82573d5df7a35dd836ccf4be7340e7195c96ffe69aab. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SEYOK1513445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715ac62ab8e1c2fab03fc89e699a7c445b3ecd2298731397dd1c0e7f9b5aab3b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEYOK1513447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9004a553d01ffb9ea6df77db4ef4ef0e5bdafe10e38c0dc16525ff8d4f9207fb. 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/SEYOK1513448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e0c5ec4f01c419cd96c981be2a98dc48786f93a88347b382ce4216fa2eda2e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SEYOK1513449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d6a96df5d7fa285005008e5839032c7cb0a53ea9fc1b2674ea08496a49d2b8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SEYOK1513451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e865a6c00b2b07bb0f9813359cb3f9f81df21549994574b674889a3c88dcc5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEYOK1513452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516582f337e1f19bb891ea68c1fb6aaf1e4f794edfcbe3e854d268e2765bb06f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SEYOK1513454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c0015b564a3901c3f7d63b2d2536b54b66c2c247b364c72abbb351aabdcde9. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SEYOK1513455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ac952758b82e4658417826635d2b9b4bda7c5ee7454fb649f0f1f574b973bc. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/SEYOK1513461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86dfc4911291c4e116742cb510b3d78052136563418e382e5505f9b7672522f. 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/CAGOO1890689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16619bfae7992022510773bbe772a52235ec651cdd8aca6988b9eaf2a4a247dc. 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/QZ9452300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a954c48225e916145ab973aa9785e8abc8d5623ae17b69d5eaf8912cdc86ff. 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/QZ9452300718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1e9337e76b4799509a3a840d91164dab3d09a151835757b33683f7ea80ad3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZ9452300720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272c6ada45745ad4f1ddbdc6ae83c5a43605501cbe74afcf9770438449a10eeb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZ9452300722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe194bcb95dd0f78d78a4c020846641707c3295e99b2a03e7c0fb07c7fb2b3c95. 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/QZ9452300730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57707031fde9238d3a5488f6444b44d6755c0250d2e9a66ee72aeb63639f1a6f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZ9452300978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4ed39a0e12930fe2865a0326c00a1163f451afb70b6795af93ddb9794122b9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZ9452300980.