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 0x20a46fb668c99ecb658c3eceeb9f30381c08345920f2f0b93a1a770c32ecfb71. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7a51e0d-8bf3-4d32-87a8-829fdf90b8a7.json and https://artists.proofprofile.net/proofs/artist/c7a51e0d-8bf3-4d32-87a8-829fdf90b8a7.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 0x1c1e37d53116e10beb61d4a37410f3c7e428c3bc8c091ff929e1a1f39575ec1f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:33:00Z), 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/SEYOK0953205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad855187bcad2026772b806a06e62ac41e7abedcac2a041af15b0f91402be43. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEYOK1106929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db0bc16f08beb544315541323d3239da81f5ad1f9c07da2ff4ef1224025f448. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/SEYOK1220878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a0cd78fd88c1d746fefa77c68c8ba8f4147fe4b5a6743eb80bc2d32927dba. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SEYOK1220883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b9efa46d7ed047f5a3b0bb07b5c8b9c966459fe164ec432f324fec08f8a28f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:46Z), 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/SEYOK1402694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afa9cd03023cc407e95b221f15ebc6d8af0d25bd229a0a0c3549fa73b1ff156. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ42499822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770dc9db6f654195e6836e27cfc24a4e54cf3c7dc0b5efd5b4d5d84d3ef9d2ba. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNB2562627.