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 0xb343af5ef49a3ba54fcd94ef1b7e2da41e94b4b0920b414440c1fbebcb0f9582. 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/fe4ee63b-cd77-4f7a-b98e-8285ba9fd58f.json and https://artists.proofprofile.net/proofs/artist/fe4ee63b-cd77-4f7a-b98e-8285ba9fd58f.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 0xd11a8d92c8ccb17e416ab82931ae113b54cf14f52c332a142a37bd6cf8f7e0c5. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZFZ72120654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8961719ab313e076e0a0784f63e8a5dcf4e68b846b06c0d7d1ca5dcfa6f7fe10. 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/QZMER2209642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d72777a31d0f71c308464447ce598551551c34e361f4de35179a5b28ac0c78f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZSYP2221120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170e73c5ab1381c9074d00c811d3e6927634ee616828d64e63702f91c661bf01. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZSYP2216152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda37251eeaa28dc39136324edf28acc729fceaf97701eb42b9d42b4154da5d2e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ22399303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c451374b23f23c1bf1d471fb0c8ddde5c00db25422ce1854dfb5d40586a7f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6P2342307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a93f7c8a4dd1edad2821952f82b6053af5443a1de573140ed45030583317d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZVEM2368480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868d44dc0d3a13c45275fc5f3e3bd6db51ba8cc593d0dce6fd5b384fe4bf20b2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZWFM2315257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1643d7a72700dafecf2b3c214fd8d274cd4b0197bdcfe57c219e35c3bfab4f50. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFM2315258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd53c123f10a579ad1c11cfdc02f684eeb94ebefaf0a32f8290dc97f78679075. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWDE2468455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9710fdea6f4518d57a9417ef624a2d03fd57f579c404b28a4b18e29debf3503b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWV32460780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc9b43acf4c49b72beb6352c7cf7477f4f67727c82096327a7831a9c4adb03d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWV32460801.