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 0x6fe59837386ac020244482cff09e8322a5e07ae319d5b7045447667b307c0c7a. 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/eb5cf07a-21d1-4ed9-9b03-0bebe09a8e0f.json and https://artists.proofprofile.net/proofs/artist/eb5cf07a-21d1-4ed9-9b03-0bebe09a8e0f.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 0x6ca3ef50d7660a917be2c699623cd635590dde8db433340d5f6bb6abb324952d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:38Z), 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/USHM81623681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a09017a9572d191ede032795e36af4c9560792bb4e9cf259982bc53d13b6f0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:51Z), 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/USHM81623684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfa20503b425fe18664794f628467615fcf16ac19b1f3497e846e1e72b06ac1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM81623685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99cf30091d07f6e480363ba2b79305111e2ccce42d492c39c0e1ef33d2ac8e4. 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/USHM81623687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea9254e56861aa0531e576cecbfda16bbcd7755f00d59ec7eaa0008a970d0f9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81623688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e34aeab6fe3a269a5ccbd49233de41ad716ea1f7dd2189fcfe6e65dd82b0d06. 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/USHM21932696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1dcd72b19a24d64d9c5bdab24309c526f4737b8ac775161a6a44087dc6bb9f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:52Z), 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/USHM21932701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed593146033ecf4cb953ff08c75907ac1538cbde54b1f3d18607ddf1a5bbf216. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QMAAK2087336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a74d4611f56c028443394c284be3b412af0fa3f431066a62ad49d26f246bc11. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMAAK2087337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe168d7b2d8c3e982245a2315cbf99db9e8269966acaffead892e7d775f32509. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:31:58Z), 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/USL4R2329641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c67f15611576a24ec63ce9dd8a88f9b749ea68ca0809612e5a191790208feb6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4R2329647.