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 0xbc1f4154d872729fe5474578bae2311852b01d436390194efd307d4465ab9c5a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a43502d0-61dd-4b78-b8d0-3e5cf1371f16.json and https://artists.proofprofile.net/proofs/artist/a43502d0-61dd-4b78-b8d0-3e5cf1371f16.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 0x42c9d518ded32a72c1cd62c80854a2b7cfe84635f51dc19d5e5639d4afdf68d5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/IL5842444667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359957078d89a68f4066823fe1c7c9a3a7ef3062876ec60984a09dafdc959b76. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/IL5842444668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be398ed00bc3cf349648e1d680b0f176d05abb6233f9d5f1d1bf81c2c3148b5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IL5842444669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658653da48b768805443a889f03c1b0a2a7c8cdd7891bd9688a5b28851399f29. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IL5842444671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3811dcbee3a7432a03e453fb184dd5a4f7ddcf6596ae387d77f8ac83d4292c77. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IL5842551065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f77cacf6bb0d0f0fedc879b322dbbd5ac8450c69d455f81528275f500d4c16d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IL5842551066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f8badf91744e8625dbd9f1ecece2787a5e7613149068f440f92a439d585a90. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:27Z), 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/IL5842551067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e4cd97e0017be7fa034d8d49f4419cc1350f0e1d1e9a40ae750bae3829328. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IL5842551068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48adfa7c1eeb66f6824ea7c11bc0b7e0ec00b8a88569733afd2c719fd9dd1b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:02:01Z), 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/IL5842551069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded7950c9abfdbc2d2a62526ada80118b622c777904bcfcd48f4c469feabbad4. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/IL5842551070.