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 0xb4449e5e95943c2722801d3e29d623e4ff1fbe064afe8a877f574fdb123e29f2. 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/698772a4-0bbc-4af4-bafa-af0bc170a047.json and https://artists.proofprofile.net/proofs/artist/698772a4-0bbc-4af4-bafa-af0bc170a047.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 0x26f25d256cc9c8c1ca451c10e0185fd6246efc0b0847c558dae88c1ca944ea9e. 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/USX9P1076332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755dfd52c550788c9a31cd42be675fe4e9368a14db5365b55c82d6752119029b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:38:35Z), 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/USX9P1076333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b7116729ac443cfb24bd02a04444270c108ad8734bff060e8219a580a550e. 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/USX9P1076334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2117875d08d35944695d0174d69dc8bb5fc762512e67a405d3f1f8ceff40862. 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/USX9P1076336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28fdf06891203ec42ec0ce932ab990313f98a7a5ede861776989c403f0536f5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USX9P1076337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b4bd07508ad42d9840709468ac309ef7374a4df3cf302961a0ce4492da28cd. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:23Z), 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/USHM91418583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c173665bc62583b791e332f64eca107ece03e959b94cce631e10dd9746b8bb. 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/QZAU61700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a2d6383c023bd26e45c4baa4ff041af7fa8f4c95dd61e6e91453f67ae4068b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZAU61700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38d03583dfde549b4d3dfd10b39a6d6e0f6f2a99750a459026064ee873b2bb9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZAU61700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba510db39989e767e178641688a1e19ccd2e2bd2861b252ee7bc10d3716f0044. 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/QZAU61700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb840156303ec12333d85287391e13174e88a2ec79ebcf7b121a1e2bc6a4875f0. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZAU61700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ba80f601937b9d274625ae2dbcca25cc91a150ad2d7a1db048f590fdaedd1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ2153112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f84bd627d73f78316bfc0202ce1f32a0263c6a838967d56aea97cfa4d731bb8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ2153113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2830fe599258a8a2f4c1e35135c54cf231b5100419dd1a144392a137c09a08fe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGJ2153114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938dd198625421f75da4aa1ab4a157709a86dc349a135588fb2d18585511714a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2153117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c9acfb596d4fd020a74d1f5c81773f2e0f3aa7dca11baa8726710e4e321da2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ2153119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681a44dc141ea19b380c614d413b1fb8ae5772750cfe85564152218c2e6a3326. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2153121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326deb422ff35a83faefbbfda39ae38abc8615a418a5e3a0ee8967700b49981a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USCGJ2153120.
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 0x49e707c62157223c170922dada7a1d9b1b52d942b23e71461d0b364546342c0b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGJ2153115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac1ed28d9025b5f99b4a9a669142a16f51a30811d14e8deb91bae6a8c164d98. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCGJ2153116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea23ad2c69a7e4324b5bcbeb0ff955db82a5c4f44fadbc8fac23515d3fd111c7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USCGJ2153118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647064faf14a6549b4c100fac62bd205ca0ae76ec5e9d2489d38fd5c31ba7420. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCGJ2153122.