1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x81f1e474c1fc9f6c8792e71b9cc337fd1e8db6bdbfc61e843f5091d8806d2ed8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a540254b-7c43-4346-9f85-c035a40a6781.json and https://artists.proofprofile.net/proofs/artist/a540254b-7c43-4346-9f85-c035a40a6781.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 → block OTSBitcoinBlock must exist at that height 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 0x090b650cd97783d0fb44dd8d05c18e6650765cac8efc6f1e4d98e85dc8bb91bc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ZAGH61700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6de34a1a6c290dc97c8c7215a54dd00760081ced5e2072aa51058c19e862b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAGH61700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227718a0ae329c9892115618b904872a59ce1397db39429b2d1e6b49e4025a59. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:13Z), 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/ZAGH61700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0ea7162804dd164a4569d143375c301a564dddd710ed8b30b93ce08e8d6ee5. 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/ZAGH61700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85931e65a7b7a470fc523c9e83d21aebe152120abc67966ec48c610f30ea7e3. 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/ZAGH61700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfabcc6da5a826f355d58eb62ec2012088898adae16c5abd6b8b6035c419b219. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAGH61700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff2848fef9c28daac3445968b9fb0b39c2136df8ca255070e3af56ad9e97059. 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/ZAGH61700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b645073439bc0f3b711bed0e3c22b68eea1d3637cb2402df455dacb717d2130. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBMA22497632.