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 0x168de88543013fe9ce00981914aa7024e5df0007248d8bac90be2fcf0d027f25. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0e762e6-5b18-4489-a199-8120d8fbdfc3.json and https://artists.proofprofile.net/proofs/artist/a0e762e6-5b18-4489-a199-8120d8fbdfc3.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 0xae862966ae4988986d6d7b7e9664da9b4aa700912de288acc0948f686ee822da. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/INS671500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8c2ae552a6c1614f555773913e18341598ebe2828972dc82163e17537d6179. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/INS671500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6282a9a75b3bd68ae0c135e078a3e274fc1fa22edf31a3308645d0785ee7de. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/INS671500581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc499683fe6069cb20d8f3889021f7448b977f5b990774dca7cf8211dca7e255f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INS671500582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53729baa9b9ca6c8c0706128b04413929a5b7d0980c1a1ed12e0a970a5dc10fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INS671500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403367ff734333adc10c4a50596dff2530b96c705b4d278281416d1d97fdcfe7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/INS671500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8356ac01e1b353ae50981e6f60ee28838d549f1bf3d204915f692c3eea327209. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS671500587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c43088e97f299fa0c71d21492ebd93526a933d68596834d839127794f260d. 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/INS671500588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b576d91930cc8b619b7fa6722245baee74c8c97204d84febcccf2f3af80f4e. 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/INS671500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79419fdf9c9a0542138d8cb6560cedb4906857a7e435ed8d35d37706883d5b3c. 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/INS671500590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2844f0b7632ac4d496976371faefe3beef4c91f27507da70f55adf216c21349c. 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/INS671500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7cf2f84361ebfa3f32cf248cf3105ac171c6016d1baa3a415b0faec668d880. 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/INS671500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa646856b53322a95b7a5dddcc63e1023d75e9415007b231bf7c0eac67ab8a993. 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/INS671500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53b524714c49e52f98273607e5db8e42040c1b7aaf7cefa9681241b218669d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INS671500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acad4c8bc7d5ca59504d38201a35ab7a7b96edef22b3ff62428b6167fbdaacf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INS671500595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8500af409caa02c653a604e8e57d56cf834c9a5df601689cb962a95e34ff413. 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/INS671500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaefde3b31403f732d6bbd3a6c567f039129ce7bf35b64269b0e61f5493b5fb. 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/INS671500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433bc433f5330d0339f2cef7e93e3339bf91564149a57c47a5744c1e234a82aa. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/INS671500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcbeeed254886636b87fc245d294c92e32083a614959c2e77f657b7bbba3c03. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS671500576.