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 0x889a4eaa3bed7cdea958ca7b1e8af5e7bf1e3251c8c43375ff3366cb93a37224. 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/7d576847-a0c9-4337-a1b9-a7219c8cf1b1.json and https://artists.proofprofile.net/proofs/artist/7d576847-a0c9-4337-a1b9-a7219c8cf1b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Millies: Violin Concertino in the Style of Mozart
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 0xb6ade1cebb0b62443b3a48af291a9d7377482ce1fa7a4a9ae2406c49d760bfea. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JP92N2238114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6281185356adbb1cc76fd13b3e6ee46fd42effd20ca18306a954f662e8b6a289. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/JP92N2300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f09ca456a53aaddfabb446153b928e41e1e1750d39aec0870015c6a23bf475. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/JP92N2300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e4d29a94ea8e7441ceee339c9e21fb06d8416fcf46f3ed8bf95abff05c2ed. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JP92N2300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19b64fc375fcfa2065dc41daed1b738c0aece2017bf04227c93201c9ee01be8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JP92N2300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b77d31f465ea404451efa3aace2c4aa4792d59e7227d90ae1ee31478c064e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JP92N2300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa656d6825c1f79f509df43ce91500fad94fe4f36011a1c2d121a8da773350be5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JP92N2300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1657382daef3349d00682887586e1a7ca0cdd0b07c451541971b2eb0d34dcc0f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JP92N2300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7a7a6bc9fe6243760d46f5ae19e8446051fb7a1bc22af9f1c33b1d5c125e49. 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/JP92N2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af19dde21e21d752a4e3d1c900f98e5ea88876af5d71959a2d1eb81ef9ee257. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/JP92N2302768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23898faeb6c68fa4b3cc77cd4eb18b8eab54cb9d8561637382cb476bd19d0b6a. 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/CBEYJ2489291.