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 0xfd26af50858c5e811a78d87d71c1bd439493d585f9ec08eb83731be89fc9655c. 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/087d061f-f333-4b42-a24a-6b0b5caa8e9f.json and https://artists.proofprofile.net/proofs/artist/087d061f-f333-4b42-a24a-6b0b5caa8e9f.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 0x6ff2f88cb73dd76b140ff7273475a398e59d7f22ba6671eaad00e1f6c293b976. 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/SEPQA0751886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879a4f5b3c00d84ad58b45ad768aef2ffb5ef436685c62cc2af49f9cb9246712. 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/SEPQA0751883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2300365afbb0a13f17f552c8a870f03870b6a4675bf723e4af8753b4fb7b6108. 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/SEPQA0751888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b320a735cd9c9666fc215dadcb820e3d878059bcb5acc91484e22d011474297. 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/SEPQA0550237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadd8ca13c17e7c855a891f52d15d2921816227f3dcbb00a30c490ad68239f16. 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/SEPQA0751882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded8b1b49c5ec14b73340ac447cc7e5fd3db239c5e882eb74f4e23bec7b465f7. 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/SEPQA0550235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd190dd36d585fe70642b8b323be0ced0435e2bf90a6dd57fa125346cdc23a. 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/SEPQA0550357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a48cf02b38226bd2b7bc3a5f90221640b626c15461201567ebc618e1527377. 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/SEPQA0550358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910eb16e92c788422aa96710e23c753cb8f21252bc338d3655fcda4f123dbc50. 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/SEPQA0650668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeb4d64126779b6a47d8cb0cebd3c3e7720f0446354204a03ac0296cae0254a. 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/SEPQA0751887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975c15f6399995dced70411236edc0d41cc43cb88368a474105a35821587d9c0. 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/SEPQA0751885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e38dcde17bfc012b342a97464935ffeb9f81e07b349b5673d9e7b0be4c0e579. 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/SEPQA0550238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30767fd0a6884c6952f5fa3edd46a27d77175a0f3022046c546ae860280c34fc. 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/SEPQA0550359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adca928f25a64a2aeac0b0a9ea3dfb063c89c56c6e88925abd1a3af86d95044. 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/SEPQA0751884.