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 0x7088b1528f2e27aec1e669e53cc613f4e0b26cb7f89c52431f61e48abc2bf6e8. 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/c79f9fec-948b-4b97-a8f3-29965a28a330.json and https://artists.proofprofile.net/proofs/artist/c79f9fec-948b-4b97-a8f3-29965a28a330.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 0x2a8e8fdb6a81d6735aa614a9c0b75d5a52cced86d075a5382b0df70cfcd0f2ba. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DK4YA2016601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c6f28eb66a988d211be02d47f2da89d4339424c02d6f9c8629c9907a2242ac. 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/GBSMU9591563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4b286cf28e2cff08163a5f90a15b9f3ab7c30e6322a27c7dda09c9aa01fa5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DK4YA2186001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ed4feb022fb222379c5fa6536edc66ce387439a9c652448101588ffec91251. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2100769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190eeac2d7c2c50a382daab45aa1e4abddc58f5eb6705efc1b71f67f80379fb8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22256105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5b90860bb71c063eaa3ee4b29c51b5e0290961fdb2bcf081efa4fc0b36b8b1. 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/GX89G2308041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e1ddf6675c6ab4492c789fff5a530423fb308dc414cec0742934232f5034a8. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:01:23Z), 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/NLYK92300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0042a36ddf0a3f1933e60fda5b20d4cec4e74eaca8a49dba451e94b3f71ca817. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US39N2313021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8eaaed3775718fd23bf2dd845e1035463bf541b8ff8c061de97b1769a04198. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QMDA62387501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae7b8cfd8ee04c278cb1d899626ef60b29adeb1ca9dc6c525d52722e4cacc89. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZK6G2561452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2047ba6aa6a391016b71ff41832c33195a9d38cd3099370fdbf508266430b03e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAR072322003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f621a91f7da13b0ea450ba901a580ecf9790651fdaff4e5dc4c87eecd39d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2034066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027bc0fd9205295f8ed71477d3557c6740e3e8947786220c47bc82e2db00c043. 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/USA2P2360114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a42026516fb3b8fb471b884acebda54a96cbcb679045f1a9fe5292297eb7457. 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/USA2P2226203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe940e690e8219b44b747b447879e7a2d706326bbc13c1a1e6905b69f80909a9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL2QC2100732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3224f34f0d38fb9e76b937d41d9ee7d74e6fc913c999083a7bc8ebe031029f. 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/QZS632196070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede62979ffb469f092163d9aa26f1d55ad68d6b04988069bfc39d9e923f78ebd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DK4YA2143701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b33b84074b023138e7d3758defb8d1df993aef0b4cef7b5aa58fa2e4bb4117. 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/QZS652229829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90341361dc4995bbc26c55744a9a7856f27828e8722971ea505f045fc77701c5. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USLZJ2129096.
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 0xc50a93d1643350570f5f19119ea5e3a3503654d76b04961ac5013e154ee82091. 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/GX38U2121624.