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 0xf5eac96e15960931d56a161c96ec3cede8314cf38188360aefc47df2956904ad. 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/797663ad-49cd-4167-bb7b-931e5a9ae492.json and https://artists.proofprofile.net/proofs/artist/797663ad-49cd-4167-bb7b-931e5a9ae492.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 0xca62a18b4aa7e096409783940675654e1f3bb8407a8165795560c744c7b4a6df. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/ILTON2301634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8647d34dcc102b562be4cc4425f930a65c08232039cf9cb54d4c3ec16641f0c7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ILTON2301636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50d4d5ec5487daac4224db53d45452eb77027af883b0a4788214cfa5970dde8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:44Z), 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/ILTON2301641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1665b76be9829e969011b8fa4337b318f1a93f2dd1c8f73f91067eb211ae5e3. 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/ILTON2301642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae66d91e81224eba4e3ce0c869dcaed42b1798ae821cf8ab617d00d8f25ecf7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ILTON2301643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f1625dc724c41d6b26f080a773883e44c9b01393f6f9d5778aebb57ce6759d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:04Z), 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/ILTON2301645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd44f319d0108d21407ba87341ca6f8e5838909b1ab3f0496622f79d627a23. 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/BCSUV2400776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a233b94d34acc447e5e60dff3348046600fd6e513e1619c15e4c1256ee2856. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ILTON2402677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54d6779882c3f82112874777dffd697466b4728dbc97fd47d5b4c1202ffb226. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BCSUV2401376.