thumb|Identical twins can be difficult to visually distinguish especially when young, as demonstrated by brothers Billy and Bobby Mauch. Twins are two offspring produced by the same pregnancy.Medicin
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 0xebae1074bf3a707aba184d6f1e722c305a8d95945806ffae8ce54e54f1f28cc4. 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/40a293f4-9b11-41b9-af1a-7524914f06ba.json and https://artists.proofprofile.net/proofs/artist/40a293f4-9b11-41b9-af1a-7524914f06ba.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 0xafadfa3f275578c562f72556efbebace6e52c62a9256a42a740be8a1e0da71a6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:48Z), 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/TCAFA2009073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d6734bcbd6d34439f3ed8c912cf919529a4c72f52447cc8174a6e7adf41337. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:39:45Z), 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/TCAFA2009075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe450e1b3653b28b1d783bb0b6aa53df34a8b449adedeb83845c5fc9b910c639c. 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/TCAFJ2176025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b29d57915acacb74640c19b2854e29bcd9639efc1c4d47b0d2756dce9ff4ba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFU2106784.
Trouble (From “Grey’s Anatomy: Season 18”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccc777be418bad202ab83181bf56c4007c9721dddc7ac7084eaf4dff06c57b2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAGC2230314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3891847a7cabb42f0975dc47a05b05da3efab7ee6c3bab8460c84e9478fb361. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:08:15Z), 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/TCAGM2277123.