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 0x0be7b639f7ce2fb76da86781b6efd88e0702a9ef97f5a65ed22bdcf2171be824. 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/dc3422ed-34ed-4f1f-b108-e4dd82389089.json and https://artists.proofprofile.net/proofs/artist/dc3422ed-34ed-4f1f-b108-e4dd82389089.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 0x55ad6a2c19f74650f67ec682383f8246404cc39b7cafe3fab1c227db98614169. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA2L2309727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6bd10758af16a538a3f656282ba5ccc429b7797675c2140941e9c6aad83247. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDE2360691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa9192d3290614b96860e7d7fd46d3da4a0f6903102f4354a0fd77b680cc215. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMFMF2387466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a4c33763d26db69edcfdb8e0b18d425a6112c76b88dda25f1653049b6b034. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ8B2377906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e2cce50f07efceedec25ec44c8c9f48a9d4c3b7e5cef790529b5099678a733. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBWUL2422315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6761d18bb9556e31dcf3f06d0d61a98b4edf8605aab9aa8bf8ea3b06e00134. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2490216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d36212b478236d7c40be4c9a4a8fc70ed3b4ce176c5dacb58adc645118c31d8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTV32424698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f00d9371b2a9932b476b9ebce5dc6a5ed596704c96ff2d945e4a50cacd262d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SE6SA2427269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1fa64a337523294a5d2fe35b71627a5867ca9db3bed035550660deeb0aecc2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6XW2405464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101982fa10a8b8253a4e7905a288e8004eff41e8b4114d90760ab087cfaeb380. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE5BU2506217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cd2793b336dcbc37a31c7182c0b2257c2dd5574702da68d81bed6506d3b7c1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/SE5BU2539030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8127c484bc39b51c87292e607714e01725a437a2adc3ad0de29d098cd739cbcf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SE5BU2570499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5649e9d38a3470bb00e1dcff4ab736e3ec6cf0f97fe1050d6968370d25e2c9f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/SE5BU2580575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05831f1816055f8508c95721fd303dafb03a8c947f0f61a7612ff8e6e401b176. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE5BU2586322.