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 0x75bbfd93b6ac595b18877ca5fbce63526c53f1749ed3f5f1614918f39b959693. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/163090f9-0516-402e-a359-289e95549a8d.json and https://artists.proofprofile.net/proofs/artist/163090f9-0516-402e-a359-289e95549a8d.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 0xfea6867492d859956e8a14b5f5820056f32483589562ca94ef4ee5374d7ee418. 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/SE5751961546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233a0526d657a1139d78b8cc2fa20e8ae285c1bdd4a3cf6c9a98bab3dc754b7b. 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/SE6HN2004004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1efe70d903925d3ce514cf014ed8910256e7f4b06c59d4db1753950ac21a70b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6HN2023078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb0696759b0f574c8663e0ee1d61fcc8c103c904c8744668c79311a72b871e4. 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/SE6HN2138270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7612b4bf4dccc7d2f52b128e35c2fb6b4d1bcf8721e01ed64f54e0440d7499d2. 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/SE6XW2181738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a15829c0b5376afef26c38b28932f939698eecd7b3dfce34c9e0f15ba62ce6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NL4NL2206223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3f5a2a72b9e84408b58fb31387fe80690dc7abb4f3c676784cf262100904dc. 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/NL4NL2220454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0fc6c61d10caf686d836f74bed1127ab6b165ccacc509bff79255823b08179. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6XW2369376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb0b208d6333aafad10909bd633acc1aa6d3162dbc1460cfcd9d63f9145e81. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:12:15Z), 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/CAENV2577543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefcaff1216b213b1a8b790fbfd8c173a74190a2121293ee233cad15aa8f981b. 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/CAENV2577544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb0b208d6333aafad10909bd633acc1aa6d3162dbc1460cfcd9d63f9145e81. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:57Z), 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/CAENV2577543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f7ca109b925f8060f4aaad759bcb6d7b13daab145a7338954e434bb147af6f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SE6XX2557207.