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 0x31cafa37b88bee0eb7fc40e972218aa0895c86f0e73da71f65f1f0ae7920ee9a. 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/b806d3f5-2c4f-424e-9bbe-f3b8b70a7bfa.json and https://artists.proofprofile.net/proofs/artist/b806d3f5-2c4f-424e-9bbe-f3b8b70a7bfa.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 0x14062feb7d876b2d490d99439e9ff02192174a9d41692aa6f2d4e943636d8898. 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/QZMWW2336036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d23f97b38ffeb2ea79856da1245529b9ac427c433d52b583707701bd9922e2. 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/QZMWW2336037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ee325273eef5a5f55e116a77019deb4f8280826080c425bb50708f895cef80. 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/QZMWW2336038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a46ed474da4e97b59c1254e2b260e64848e6095754951e51f0e1692837a72. 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/QZMWW2336039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aed365b12d7bef9be433ee75dadcb844995dfa85b54af12acf24371d70690a. 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/QZMWW2336041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18d8e10286275cb6fa32250395d46206fad906fe86b37c43acbe03722893705. 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/QZMWW2336044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4d3bcd52f428ed18b58275164969ed361bbe44ae90eaf399eccb9773f92588. 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/QZMWW2336046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3fd3487ac32c1943474fe8b7c96ba979eb8b7d3a99927b2d9ec4a978fdc475. 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/QZNMX2217504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5b7ed347ce034c6e9986847f2c91c34569b6059cac1d1bb87bfc65938266d3. 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/QZNMX2217505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55381658a7179ac69cfafb8ce3cc461ce9eed5877282e10b747b80a3a622290e. 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/QZNMX2217507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a94f3afaa3c13f6ca8dad68f0ba06f27c841c59d787994ef5f694a5090da7e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:51:41Z), 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/QZNMX2217509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84dc0fa100a96dcdb139cce2a56a80c80846892dca848e979595fedae7159e. 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/QZNMY2280204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397abd291c5690a78b46e9c43fffe2fb7f36dd556185daa567b2593fdba7545e. 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/QZNMW2204812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6002d78a2964e5211cc72f7f16161bf461569ab5dda7a9c383a0e9dcae8ec710. 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/QZNMT2297647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa214dcd00631daa61927abff0318a2993a75ca99f49b81e563429bad4158f. 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/QZMEV2249909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6bd3d177d61460db6b7b6b64c314ed03ca6137ab19eec1ca08ddd71d2ddbeb. 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/QZMWW2125067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead99c639253416224e1ff7b1f37b3471b6682f34a4e9958f1913f5ed9a1d63. 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/TCAET2083763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741564c18f4378daabbf161587ff14b6adc6493396553d8a067d3ec0f09e272b. 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/QZJG52340117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e373c2e9dd10e37493f02bc834c7b1be4b03687ebc30ebabb02df25786b2dbe. 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/QZJG52340118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9293cc77b0894287de3a36b5a444ebbeb33d83452905231395fb3fab010ec. 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/QZJG52340119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75469dafb464ed92a8bef6a9b300becdcdc533f8609585261272139aaa66a5a1. 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/QZJG52340120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe37411c0d841b6a5e866fff92a9ea65965548e6c929b93112966d240067f8ff. 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/QZJG52340122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab709fee1dfe7c1effdddb3b240297dd32af9afe6c0b24a3a7517de6922ba2f. 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/QZJG52340123.