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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e3f6d9ad248026aced504a26f9f2b5f02c715b55c4a7d0afcc1de9e25619ca. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68e690d0-a60c-4439-bf40-f47515049f11.json and https://artists.proofprofile.net/proofs/artist/68e690d0-a60c-4439-bf40-f47515049f11.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94679ecaaf191a7872ca424fb259d145047738d256a04bc79e2031da5b3d5144. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:34Z), 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/UKP3G2005973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ce47a93174d6664ff54b63d3963650ac42addc602b1e7b9601158ea2ae92d5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:52Z), 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/UKP3G2005974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd641e2f4690cc2fbafe041b775f9c9ec19e016a90e00252cd17cbd937ae10493. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/UKP3G2005977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dee3e904f671122db0ea113b7cbce2252bab58ce837d693b2bc6ce78ce2f47. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKP3G2005979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185b3cc075aec8feb3005dee7ec42e7c55a8801c18847a74eb6d24f131f30513. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKP3G2005980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3605fce2634079d616de00d39894385a3b785476807648f807d59ac4e703b322. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/UKP3G2006395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef455e78807fc6b2d334722c43762cdd8f97f7016400fbaa92d4c496fe3ce794. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/UKP3G2006396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cd8a528453e78f14650f917605a57e2c47ad9d66338f61cc9d0a099ff6e759. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKP3G2008219.
Halloween avec Blippi (Spécial vacances de la Toussaint)