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 0x1400bdcf5d494a144be0d8170245b3f5a2d9748bc162e08b43874dd93e719351. 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/e1c7de5b-dcbc-4804-bd54-36c7b32ca237.json and https://artists.proofprofile.net/proofs/artist/e1c7de5b-dcbc-4804-bd54-36c7b32ca237.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 0x1e9830c2bb8067d61f187d870090eec9c5121316b64ae7e19f05236bccceec01. 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/QZNWS2416130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41584922c205ca02cd5cb80aa914a4b2d48134f84d0042467afbae8555fea385. 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/FIBAR2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116f3b740b2dccc0cbfbfe8112a8db33f8090f8dc7d14c1bf5abdc9afa84d61e. 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/FIBAR2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ea3848aa977053ca5df6274c34e775a00fc489dc17336152305c013fc95ca1. 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/FIBAR2300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c570f9d84c401ace55078b53d29c8e4f4d4eab50d982dcb8478e17c4eb5a67. 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/FIBAR2300493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b14926d3ae003fe62ef3b86df9df98613c10f7a8637b59198853e53b7657d. 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/FIBAR2300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e2567a382ae9d2401104d38d9608bd004caad299f21319251a44618de9cb5. 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/FIBAR2300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff3ce5e8d1c04fcbb31e01e30a627521ed4a4f6923cbeb218a2c1a9e0fc1522. 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/FIBAR2300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444836eb1fcd78718a2b05963817b6115da86eec1a15c93e0b8c6e51272a1035. 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/FIBAR2300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9500f9df554c8ce91c1a36b5b7569a54d5847aa5f86990c39c64551ca810bc. 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/FIBAR2300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368d50aadbbaec79b641e061a4f6192a76e5ba0a0d8a67fc41b7ab83086061d1. 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/FIBAR2200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6644b39ef483c48c7e8879e0b2ffadbe7396e86e8724eb00751a057cd60405de. 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/FIBAR2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444836eb1fcd78718a2b05963817b6115da86eec1a15c93e0b8c6e51272a1035. 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/FIBAR2300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6644b39ef483c48c7e8879e0b2ffadbe7396e86e8724eb00751a057cd60405de. 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/FIBAR2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368d50aadbbaec79b641e061a4f6192a76e5ba0a0d8a67fc41b7ab83086061d1. 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/FIBAR2200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6503b8be5e39f0004dd402bbc3b152c035c09ea2263aa50b5c23e59be32887. 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/QZNWT2189787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb367586cb87a9fad38b350abe16a3316718afce26b238c6909353e0c2a754cf8. 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/QZHN52113825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9581461703c34e6546427dd7063fbfda5cb8fd76d3d80ae62c86bbe3372353. 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/FIK3E2500028.