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 0x7d3be3ccf9879c98efdc6361ddb0addbb8c4eb32ac186698a02ccde874cef2d0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b8d0521-98e4-4eb2-b260-2ee710d3d287.json and https://artists.proofprofile.net/proofs/artist/6b8d0521-98e4-4eb2-b260-2ee710d3d287.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 0xd55eb9250513a18bee34c4854566e43e9d36aa34310930bce422378203b124b6. 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/TRAUS1500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c57fe321348d746b1e43f18dfa6b71ec0c09e9c69621e81fbce1d835f84dafd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TRAUS1500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148d0e337e0ca83559e17c99b77f475fc25162e493aa06d211824950afba5fbd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TRAUS1500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf80705603ca5e93b2b526b6576eb6a9e97d4883e2e835ea3e76f13721e49c4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TRAUS1500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7a4d2fa16a0d907f683c66324fe2e4d22f1064c7912856740b9d13fa457d6c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TRAUS1500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01651a2d2f06263c288612a9422ce01a21a298a12b63809e73caa3f36f789e84. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TR5511600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf728a18066562175a5fef633f782a7e9079f4633a4b89c5c01984c6495504c7d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:25Z), 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/FR10S2370729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87ed3c1979df72e2ff8c620ca376d25c461eba22852de440be9a19b3edec46. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR10S2370731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aef295211083772136bbdedeefa69467d7a7618b0258610758f8f58594c809. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR10S2370802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadd39c3803d93eab512ee39a396ceb3ab2a58214f14d437915d55852fbf906. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:46:14Z), 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/FRX762550591.