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 0x6925049778c76472da13e84e64160676dd3230dbe69fb6e59463e464d2d57c4d. 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/93301860-ab45-4e8d-8106-e95ee294ea9b.json and https://artists.proofprofile.net/proofs/artist/93301860-ab45-4e8d-8106-e95ee294ea9b.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 0x65588b3a66f48078c65240024d0a90a3379dd435fa140c698f98e17c8e68a556. 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/DEZC62431663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e0a36d6790c523eacc68135b269bf9a2057064b2ea84be322e0ca064802f99. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62418655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51afa537c365705a2413ebc769819e42c80fee3208497363d75e30047812c647. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEZC62404876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda883463fe0ba30b08ff1b382ba81fc3adc7382296bf6ea2de8c910c398e41b6. 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/DEZC62352025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c42e4bb5d8865886ad6e76598f7a5c5dbbc51315cd88950ace790a6e322acaa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62350005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c0a7fd0ec0782d9111be8f72b1b15e5628b6dc7fd81448ab0596a26241f36. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX202308021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6958d92b850d727f9fb5f8904defeadea33795cc52ebc1b3e9dc4da426c09ec. 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/QZ7R42054191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9ae49c9e822d89dfa0702e5487498a7b4f782dc2107b9f6aa305379a252f49. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62048419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c34b8fbd50167d8c627cb6a0c29973531c0d8dffcd80246c8becc93ad7967b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62029819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6276e82dcb6379adde5bbc71049d0eee294b8bd5d8c5fc19855934b519212c6. 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/DEZC62029818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b862358b4cd82efa3abda3ce5d4941a6351b9d1989bc18b97550b7d4c19baf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62012199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c57d11c1cde5e6145cbbfd14fe58e2d2061cc45a01dcc668ddcd643bcb5da61. 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/DEZC62012200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f0c59a1531fd316ac5cd3ef64c1e318aa043be504feda305eaf0a3a3b1e9d5. 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/DEZC62012196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27469298b9d65fb5d74de821af006ada33ae4261a2bb25cfbc6421f639ed06a9. 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/DELJ82043066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7e9e47a8085886f6bba472bc1a9506c2193fb90a3184e5ebb77f20d8fbf77. 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/DELJ82032569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0a7bc943f0739daab8cae52cd44a8c5a44d9e0ef5310f7b7057b094a0f6b9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:28:31Z), 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/DELJ82089920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a1538a8a766418df5ecc1566da0a219910b0a20ed8786b0c3accee3da42bb8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DELJ81949528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3761b26a705d51b4c2e84826963734da8cac6004e84f05dbb06ff67ae7511366. 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/DELJ81947331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2577ba1960fa04024d464da1c00a528b532c958b9a3fa22aad03cd530b6b458f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DELJ81947314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541d9c2895e5c4630ebfe6381d6283bca8d5a781367553e2d24cdb3bf511eedc. 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/DELJ81947338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483275dba63f1a066096bcfcc4fb8075ce94a295cf61ada8cdaf0c6befead469. 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/DELJ81947324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c97b8a89f594e4d3f604050e8752f5cdc9e1ac87c25eae169eae43b585b5898. 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/DELJ81947339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6031e169a1e7fa3a5adc8dcfa7e094c9b9c16269cf4b118bc378aaa5a202a337. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DELJ81947332.