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 0x0d110cdc876b5ff6eb405790ec17682bf9a1f1709f960890642b52f6949a9374. 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/518abdd4-c367-4d39-bbc8-e770ec6bc5fc.json and https://artists.proofprofile.net/proofs/artist/518abdd4-c367-4d39-bbc8-e770ec6bc5fc.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 0x427bd0ccbb3f58c32b01bd8a26e6972d5869dc9b72a7759144455c79f477ee0c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:54:10Z), 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/QZFZ31952302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53426f85b38002df0c685cb0385be8b87c2d2baafe0a5e7e2ec74c0aea9ec407. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ31952303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51cdb6ae31e1da218714cf369cc35ff2dbce24038cda6d3bbf2d050ddc2693. 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/QZK6L2061509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107a80ee95f2e79a4961bbaa53a2d6f6542942762dcb85ba53a0f946bc2c6886. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAFO2164546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27024144395356e02eded0e648ffe34cc9763d9163eaf3a1e76c139feb1b26a. 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/TCAFO2164622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3bb53e6af111433ac7a2803941c0a1d91d985e90e0f0c6f25bded6682a58a1. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/TCAFO2164756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32708ac49fec47d3002f20844d73a02e2ddaa4dc164de493a2a27548e51ebd0. 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/QZMEQ2038249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d4d6eed6287bd09899ecc22341d61d2a394c117d3fcd5d413a880ce1d72dae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGA2272828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa1b9572ae63ca93884199147f4cda761460a0043041c77bf75e424730a7cb. 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/QZMEN2012104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953c370e108d700e4567d445e8b7509f16e5e91e248650e93f905659868e8ecd. 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/TCAFR2155402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea61ef062bbc9edaaa5b9374a5180846d0a1b77fede8e6f32ca1ab59fa5193. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGA2272932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4356ff6da69267b453366b7d6bd35131ea015daf8fcb8d65068858f37b190f1. 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/TCAFT2160380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d26ca676328d53a9925fe1f7fd317ebd7877816ec4eb6e073f8ce8947a03c8. 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/TCAFI2175831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28261e82a4c2629fc7131b0442d247f6e56f2d2a32d310fae1844c56eac98828. 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/TCAGA2272972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9927fb85f81a0ca89d151cbd90067bad66791c808081a77adbe228444e1f4afd. 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/TCAGA2272973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3ddea1dc612aaca00ad922ce4cfc640f36df1c4405604851d53f3d1c865a1c. 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/TCAFF2089870.