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 0xdba9dc4472cbefa129c599ce9745876b980be865ecfd9d5aa3bda3b61ba458d5. 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/c1c986cf-bd23-4ca3-9d1d-6e219c37fdfe.json and https://artists.proofprofile.net/proofs/artist/c1c986cf-bd23-4ca3-9d1d-6e219c37fdfe.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 0x83f5c59f47d7d35287fa67db839e55c7dc8549dce80fe260d80f3169ff25dd90. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USSM11606933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f788ca6f9983ff27d88171e114c5d047253c7b7890a5ca76a0db8b0112b75. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:31Z), 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/USSM11609165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95bd47cc196479871186085be2cfea1d9bbed9be918f5c7014486489c187fde. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:15:24Z), 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/USSM11707781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf810c4da11779ecaa08bf7d180005fae116704a29a1abe69e4f5ef2085cb6dbc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCADP1810451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db55f1fa438bd2973be5a1d0d4dc780ac011c72d1a1d4714807e2936d0b92e6. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCADP1810454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a52717f9811322d262203f471aacb9140110d2dcc20898aacc608e87c36805a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCADP1810456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464fa112e9b06eb751d22df84f60fff8132e1d534508efec1306cb22b5059b44. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADP1810458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d93bf1eefae30ea78f8402a5399fc3d32b5002a96029268b7ec0ecb69263468. 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/TCADP1810471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2c2f4f0661e38a0592f32ffd9e41dfb43effa4cbf6f452d75e4d3875702339. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCADP1810478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55397c2c1d3909ebb51ac7ff7bc0af0b303c6f95e6e8eb37089a8aebaa1a561. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCADP1810484.