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 0xd92336a9e62f1ad3591646016e2154665648a5b184888650b582a1be0cec0703. 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/c436f6bf-def9-41d1-9738-e951295add93.json and https://artists.proofprofile.net/proofs/artist/c436f6bf-def9-41d1-9738-e951295add93.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 0xd8e231c07b3a6e78c2540b4411df287d21cce44bd1dda07da4aaabbbf1605b32. 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/CNZ852314360.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39c575e4c51f54d76070b1bc6269a9f94f85ea7406dd05a41e0393cc12e9bb6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CNZ852314359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa978a1c48011471a8afae6eb4bdf74d2f4ade2f26e38c9dc4e731448adbc3d27. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CNZ852314358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03989c59f39f8ec6b4b8dbb849a15b458cc95eacfb16a3c5a3a572c451413ba7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ852314365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038edd346bbec58cd141d6224c8ce2cae90674b203909abf25de1833aee250f6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CNZ852314357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12884fc3f07b9043362d3d360ed04c803f00babd07200dcb1fcb47141d9a9ff. 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/CNZ852314354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a1f3392f9c9a29aa76d4927788bff1bee37956b769754376fd50b3419ca5f. 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/CNZ681900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e10d4275027fcfd7cbbf574fb8c6f9f3d9ca007b7ecc9f0d695d903021a0e4. 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/CNZ681900188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe438411e9aabaa055371905312c039d9f6b0b11abb26c2afe1f9f1d24090b1f2. 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/CNZ681900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaf44433d59b53689d43e7eb50ee908ab121c8103962f237013edfd143a772c. 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/CNZ681900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1226c11bd271aacc5b5efea97d594cff858ec308b0b9b5eadb8a5c80d128943. 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/CNZ681900193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9afed7e9ff04f72f67590ab41ac9b10ef9e5ae273efa80f5494cfa953d0679. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ681900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce660f5a6a04f9c559d40cee5879a632ea5eef351c4324b756d963e491895a13. 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/CNZ681900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af4e41d5039eb41c7a08c2de2207a4346dfb2bae22085f19488358b845bfeab. 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/CNZ681900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986215eb612b15078ab40567c14466ca72312465a6e4b456d60cc780ac35a972. 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/CNZ681900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227996ca6cec12ac86efba45bc90287d6cc550c49988ad7a224da36daffffabc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ681900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ed7759900e56e80ed19033cdda42e0ce4550e1f5b1f37b7c97d21269833cdc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNA132300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20243754d3a5b84e28e9585ff963b49da68bdf5e4e05974f43de28d5d8419b5. 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/CNZ682000259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddfa20e0f6a344e49f3db03e2b1421802896dbf01e2427f8ed30515f63713d3. 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/CNZ682200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61512e550ba10a246fbd119397b9b1606685e00dbc39f5a07eabbf9ac1c2d160. 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/CNZ682200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9195c3e44dd99332df777f64ea0a0b119a3ed093072b237846d83eb8ae73ad0. 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/CNZ682200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cb1a03882bbc9d16d38de49b0caf61348adff340399d023cc273cf3fe12167. 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/CNZ682200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe9f8bfb79c778770630e27236d1e6bccaea52bbcef1e08ee57cdb0955d05d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CNZ682100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e04d3157efd25afbb443db57d3905647860c229ffbba9f0b14b09a10921d8. 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/CNZ682000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b81021ea715e9f82f878c66b927b8954539e459774c01e0f260dc7daa52ae01. 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/CNZ681900162.