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 0xc97d0e2556e4ca7b35c2fa572ef971c6ad46e296a279e3771f160c08a9c97b26. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be7a8669-5173-4496-8af2-edbf168b3957.json and https://artists.proofprofile.net/proofs/artist/be7a8669-5173-4496-8af2-edbf168b3957.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xd3d1bf1ee732afd5cc53fa347ac044ff565f4c78f3fffa3c235ccd3b5ae824ee. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:43Z), 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/QZDA62589173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf7d28efd3af7fcc103475bbc28c7fb6e6ec39ff5e0f53882768ae7c383de77. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:17Z), 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/QZHN32545476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19423100a43209fb0299f3651aef895b7ba8c1b94bd685c58c9364ec040b168f. 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/QZHN32545477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fb7b5479f0de9420239e8def48b66423e82ce834a48f1689a15347e44e1a2d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN62562329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbc0865f0a0f6807b446e3c064912aa3322d74ba643ab2cfa4165ac6097313e. 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/QZHN62562330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb5ae7ae9aa045ac28ae4895c4cf480a89391ff10fa38dc2c1693cbe5bbb18a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN82571656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f6ef301cebb1f68bcb94000466190c6ca13598501a5c2a371212f58db98e78. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZHNC2562513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aebed77d810f578d3950d30638aa66dddd2c4eee1c6ad4e2c59fb0a6f4d975e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNC2562516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16779ce589de51b1ce41a7338b86faac4132e36864997985977e7c148d07a01e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6P2566122.