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 0x03c41fb23df23964069d94f5f3b8aae801c9bd4343a9aa711a5c06ec3d9f6c4e. 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/5c72a8ce-a44e-4d95-95da-36768b4dd8d0.json and https://artists.proofprofile.net/proofs/artist/5c72a8ce-a44e-4d95-95da-36768b4dd8d0.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 0xe201a8e7fb71a934d892d6d2302e66fc5297f90ef9121c969a2be06cf23b33fb. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZMEN2401966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe166ef1e03a6ff3a1e401a78a9b1e790dfbc7c95b600a0ca0aea56e02e54354b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAW2420320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf97601597f45bfe8f03f8fdfa8e36e1c230919f190445d508bbb648211f9b4. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:30Z), 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/QZFZ72569714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6113b6fd365c615a958f23f523fb42dbc83f7f55cbe9ea25b0606b520e4ea2d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWW2521979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578bfa540b7ad7480a0b50d0a0fef71dd9e7efbf72047de1c8684b9b74ec6092. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTB22501721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4497a175e23b3f09ddf3ec4654c39b6b70e51484bc0a4e8635fcc805e50a192. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFH2512786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf38ee70f6833d2a127ae85e9ebbcf7a634723c533c8dee0a72864bb12c415a5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:37Z), 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/QZWFH2512788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb442ea4b5ec07a16fbab0345fda33a88ed96e297a5aaada2ee5ecfc955fc327. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:14Z), 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/QZWFH2512789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f89178d27943b2e7701b40b344d2a3f17a5c1d922b5e41193542dd90d28d3bd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:48Z), 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/QZWFH2512793.