thumb | right | Lucien Petit-Breton, French cyclist (born 1882) Lucien is a male given name. It is the French form of Luciano or Latin Lucianus, patronymic of Lucius. People Given name Lucien, 3r
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 0x838e50b9f75639de89edb0ed19c254ebcac4e70ba4fb5f59412b3f4627db2450. 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/72fd4f44-9f47-4785-8bd9-b2e6394d8adc.json and https://artists.proofprofile.net/proofs/artist/72fd4f44-9f47-4785-8bd9-b2e6394d8adc.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 0xf90857489d31f2bfa1db41c338f0dbb8dcf543647e60ecaeed7db2e690bcc10d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BE8LH2300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067d2797243e5bc5f3352233b3b97532ff8555beb916f82682117665945194ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZEB2314234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f441245aa4826ab26c267e5306056dd3f7a5f16e12012146f93eca3fe244577. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2434754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91887a14a0de04655ef330d6fd3cdd2be03b510d88b7c486b1948d09c387161. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2400421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd0ae17c2af241255a4710d6390e67ab4f1627afb651118ceba59917d6e312a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLX3Y2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bcaf474bc091e356f276387f4c55a983293632de2060798670567786be4457. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BE8LH2300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbc1c2458f300eed870ab35412c59207e60ac98a181909eeb7bf4a9a04f3b14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLT2H2300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aaf5388c67b80d02eec646756c2b3a3b7355d9aa9e0e11e7ae781b7f2b4c28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CACWV2365967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4f150dae7856235c263b771726c7f385ad09d7150bd4b26547f21ed39c9499. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BE8LH2200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4b46fde98ab1d8e4cd505826d7226fb0676aca4d3778223de9ca354c3ebb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBRKQ2549727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a326b60c1b5c1ec6e2fb06499ea1b6247e95249596aa253b694443ce2c07f02. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2507647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb205447b743a523b33d0c3f8fc4787797c057c778d6b2de04c690223fbc7534d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ac4b7a8f5215da78109eb7b98f19e5ac5a28b4fef490c943dc54ad54dba726. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BE8LH2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c184e8229f8ba16b9f95ca3f1e0bb5d76e5207850a85b127763bba06d38ca6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLX3Y2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830839f22348d993f3476617f1f029bc368b97632358dee2b050d806f4f5c37a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDE2433900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eebdbc79d8d2fe3f7893bbdcc664ea7bec618b8632a70c0ed3c6783390aaae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742426157.