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 0xa9f585fdc88bf6aab8ae907587b42953987fbdf1252e863032ff19e8c200d509. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e709760-0582-49c2-b4ee-e3ebea21c399.json and https://artists.proofprofile.net/proofs/artist/0e709760-0582-49c2-b4ee-e3ebea21c399.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 0x94fdc866f38aef6c1acce029ea29f53dcec8a942a64ea28a5804f78104d84f33. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/DEAR41978270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0291c42948e012159f976874065e2f74704f395e4bb350f203bb831e5666aece. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEAR41952957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4c47e4b04b724c318a1e5caecdf790d61c22c2d07973accd7205b007c0b143. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEAR41948795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e19a8eb2562abc7151c4c01d687c37c272bc572d3e6bb56a95c42196d87c22. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP1977917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ca724f56be616a7fa453279136aa71fb048cd4a4a3dda95e531127a39a5834. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBLFP1977921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf786d0289e0970b213fb46e2c5be14072a7fe5a92895a27695b99da72d3fa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLFP1977922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e27a810bff588b045eff41730324994d33266572bd80e9b23fbd284855b9c25. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP1977925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0ffd943e00b6566a474fb283dd3b9f67a1492223201ee1b3c4c6749473001. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBLFP1977926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366c7a615798e218d68e1146f7c43b72b877435b9dc4c7e249706a3dd2b70629. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP1977850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2c61b77c84ca1a13e3c249ece88ea866c00439dc23a02248eb7a3e43fbc11d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBLFP1983349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d47b31840e082c148778796adf7a0f48aade2208a91c7cc2e86056ad707ab58. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP1983351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa817faeb144747ed13e1bc12314e1e4dd0682906bca757f462fcf678a7e8c2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKXN21963117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ad5e0150c365b220d2c40a002a91bab74b345e9af905c920e0402c542a07e3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRX872245041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381e24314f58b449138f0a6a5fa651c5b0b7defb3db7c8e04e2e3b38bfdbca94. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBLFP2118724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5014d6f35e737ffa2e8fb1b946b1d51a234f8b7e0916e138d86cb7eff3422. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKXN22228841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a40f91212c4bc868b60aaa2c3d84550e0d3f9a5e95bbbbe19587069f8da7708. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKXN22228840.