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 0x4d6c05ac2fea120e1d0b1abcd8ebd180c4d40b15595f16ef662064e47c4c01e0. 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/bd78654d-14f6-482d-b3de-959e3f7f9265.json and https://artists.proofprofile.net/proofs/artist/bd78654d-14f6-482d-b3de-959e3f7f9265.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 0xf89faa2bed840d75f194e5ba34bdb717b85c15dea833896d39e37f52d1b20ee1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USDY42411196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6dc4440324ea02bac2c605e4f323a8205723f9b8fbd42231d82062044056a7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USDY42411197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf58f198a13065a6c7ac193c2a835e1b50071bdf43b6fa9f37c8d3bc7b17ece. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USDY42407798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60486dcefd98b32bfbcf6d4b947e6686ee6dc4d78474e71e80ec3ac7677f1fc. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USCGJ2446086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe320af3843560c3fbfe8a36d7a7035b94f14d0669d8a565268127c737f74bd5b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USL4R2409459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2147dd0293c18f95fbc0bce94429b734a5da52d086712ab9d7741c06be34803. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4R2491253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74dff0eafa551eda3c98017411fb286c51c2df965b678b9c685ccfc3b42be88. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3TB2404475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41064ee27141103c5ed9673035077cc7a0284ef2e1457cdde9e3755630607df8. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/USCGH2567409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041fa8c0d30a7fed868ed517867da4332d5cba3c1aba87296af0fea34299be5b. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/USCGH2567410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e164d0139d0573ba0074af9f01727438d0021a4a59c8b6f9581decb298c1e74. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH2567413.