Lenz may refer to: Places Lenz, Gauteng or Lenasia, a township in Gauteng Province, South Africa Lantsch/Lenz, a municipality, Canton of Grisons, Switzerland Lenz, Hood River County, Oregon, an un
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b33d9a21c396db2324096e924ebae941751140adeb274db3b2c644511c4bda. 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/7798a211-403c-4862-92e8-73c600a68c3c.json and https://artists.proofprofile.net/proofs/artist/7798a211-403c-4862-92e8-73c600a68c3c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ed0cd18bc45e29af7674bcebcee9b408f59a09941b15c618361c8e26bb901. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAGM2294972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5423268c8f010e26afb9d316ceaeb75b3a586267ef04b0cc51876c79e95e669. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGP2203856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59467f33a99b9af63d257b71ae0c0985920b56aa0929ea1105ed14b62056344c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTB82247815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17459edd6dffb3c0bbc5920c489aa64e07735f4cde83c2b9e68c08909f872667. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QZDA42351007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adbb5416ce02ce763b8c04fea39c06e88a047cc3bcdf2305a95f3189463bd87. 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/QZDA42351009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d613ac50657529163e907af48e41f5805b75348f1c6a2dda95d18ffa2fb6139. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZES52329991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e0462742e3c78dcd7a61012fb113eac42e474ecffed55aba430d8d3c6f1898. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN52354543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ec0efae2d8966929dc110cb13d2859b091cce499fe04176982a52762374d8b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6H2327340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dbca86d5c631805c5ebc23b1a65674c8cbbf84715bb1a5b173d0fb837b0485. 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/QZNWT2330320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f20e58f256f25a246f789f8028c5c9313c4da33d7b0b0fe823cab5f9f30430. 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/QZTAX2314011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a65fd19e8792422b48be6f3a8d7261cb43c1265b51bc7d505bd7451294bf7b1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTAX2314013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183aed8b0a551a17f1e8de16ac061d0cf1fdc13e888304855bc18d3e0fa4ce0a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZTAX2314014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2ff6b96ef61fed28fbfcd996a525a3dedfe6baf6f6517c816b17b7bfa04c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAX2314017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d82b4d4e005a0fd4c0d12e1f356a31b0a193227f8d4e5c65fe1f7b977c1fc47. 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/QZTB22305325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe49dd70e3459f280696d5000db26d1b06d6937b5b8162cac6cbfc332cd9fbac. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTB22360953.