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 0xd1e729884afc26e3c3e081d8d896c6ee2b01be3a7a5b4bd8eb4d4206eacc8a1b. 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/9facd5b9-7b59-425e-b8b4-481111870585.json and https://artists.proofprofile.net/proofs/artist/9facd5b9-7b59-425e-b8b4-481111870585.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 0xd927ca17f31acda733270f240ca44bc25d22fd14d898d01b21d72f4d1807e4cc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR1A92401718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c85d0b0d5c85f21b47bbd409270ed3e1cd70453b1dece43a4709f3b459a5655. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12412211.
Enlève tes pes-sa (feat. JKSN, Kaaris & La Mano 1.9)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2558f81338730b2cd1203901ed8bef9b1baf70cb469af91eae5e591086d1cb5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12423062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac50389b032d4eeca9ef702e49a914f9481d293618c8368c192e02323e4715. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12408974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b267c5c9b4c61f5013faf065be8dd05b97f6bdce8bbaa66b8a56d2fd759bd35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9IX2403830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b267c5c9b4c61f5013faf065be8dd05b97f6bdce8bbaa66b8a56d2fd759bd35. 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/FR9IX2403830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c38d7ed82eed2b34bea58182f97e223324635b91a3b8cd7d6989fed8a262f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12415673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44932ae61aa1a1f345abd94893201ceda3742f9eb669a629ca3df0f061b07b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12443199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9172b998a72f05fb1f947ec7aa549aaa651a6c6f35a6b7b8c332bf6ddd4a710. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12506138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8679ed5863beb6aae33cb0318c7793ccdde801f36a02fee3dbaad5b2834a0949. 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/FR9IX2500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9172b998a72f05fb1f947ec7aa549aaa651a6c6f35a6b7b8c332bf6ddd4a710. 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/FR9W12506138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eff48fa81deba8d23b9784a00c79fcdbea117a6ebf00f52de91bf6d9ebeed18. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRDJ72500490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf22033aba7d9d72a3b1104207bcca79e511db1b0609936aa743762e3a75364b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRK9V2400010.