PERI is a manufacturer and supplier of formwork and scaffolding systems founded in 1969 in Weißenhorn, Germany. thumb|right|PERI at EXCON 2025, BIEC Etymology The company's name is derived from t
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 0xe5fa1d662788bbfc0111a044620d4ed0eb3eb900b957be3f3e6eb76887ef98c1. 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/2064b655-c7ba-4df6-8643-f7325afa2aa8.json and https://artists.proofprofile.net/proofs/artist/2064b655-c7ba-4df6-8643-f7325afa2aa8.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 0xf6bb14b51b5deaf5e2689f0cd5738e702fcb84040c83947efa2e7b0760bab1fc. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTAU2243308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d1415b84f4b54448a1780979d3314d7526499a3b6e1b0c186176fc0794f014. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES82325629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a26bb1e6702ef828f9bcb1667a34e061db35209436163b139afdf0b253ff19. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES82325630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34296d085a8b8e6448d4d14ce5fa14bcdd76038f5400919b2f414390e0900bc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYY2389404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef62c1bae71f5b917cbe4211395120627bca39c7238a41ef105e38fe36c040. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:53:29Z), 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/QZK6L2246898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c1ec61d9c1f8b6303c24e8ea07c898f561ae99f9b428349e953d2e3f117885. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES82325632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b1eca53383e89838f0f5d9dc47a4644642b2c973e84d17d9c4f1dea742e626. 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/QZTB62244462.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb511519bf93c5ee616c1a45ef6da127cb2f7324e1e18b079e3b78ae4d0883c40. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWW2394915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e86319628cb9235e41ba78ef527f4202b2582a2a264f9e0a3f93d1eced044. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITAXQ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f37b1b4d313cf55ed71850c91402cefacd3573d7601ac1f9046e0e9506d0cb0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ITAXQ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877bd54944c0c5741c2e1286616d4ffed16186d1b21592bda385a9b997915bd5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITAXQ2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b2e0060b654aa3888375294d7c3b30b5abb63137961a5e9d01d70c44ed49d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITAXQ2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8110e808676e62f2e84b6e8f91d68b7430980f6ecd13a608268789b0e6539. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IT1SS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e86319628cb9235e41ba78ef527f4202b2582a2a264f9e0a3f93d1eced044. 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/ITAXQ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fccea718e33d80e33a3b26af18b24f5b386ebc6ebb6b7a7ab89e8e420bb455. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITAXQ2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60b0a32c8b36b35e73237f025357c8e3c2565b5c469feaf1293722f0260002. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITAXQ2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c2dd6c9da49cc1e80ec2c113f3951f37112a5f8b63b2444cf6b7149e81c570. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITAXQ2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f492c91c2a342a5d9750ae6a3087953796deaae81db68698e2c89c9a96f32. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES82325628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d1415b84f4b54448a1780979d3314d7526499a3b6e1b0c186176fc0794f014. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES82325629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34386feb21259fdd27797b5be2b76244f2f29e09129a52e4120b32a3e07d168a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82325631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c1ec61d9c1f8b6303c24e8ea07c898f561ae99f9b428349e953d2e3f117885. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES82325632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b1eca53383e89838f0f5d9dc47a4644642b2c973e84d17d9c4f1dea742e626. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62244462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff946d4dcbbde266ae22206250aa9110d9b68253659af353f15fd0eeec2f61. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITAXQ2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eac367665d69d14a734992be97155d25563c9cd2ac546efea602708f9327a4c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ITAXQ2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41c0c57aea91283c7f162262e6b54d32a9c759ac54e7584844fd7281e70328. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:03:38Z), 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/ITAXQ2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa161c0f3faed828009da162b3e155d6f3ffe0d4b54cdb19b6c29d8c44de98f52. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITAXQ2500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf26c1306290e9c211e837b70e0e5a013a6f147194d578d5530e30b70e62ac3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITAXQ2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c2dd6c9da49cc1e80ec2c113f3951f37112a5f8b63b2444cf6b7149e81c570. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITAXQ2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb2f5b7869f99c0e0bc36d3706787528e6eaa73aab387e85973e8a406e285fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHI2329114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42a798e155a98a3bffbb9a89e1551d08a938696933b2929cedda7a7aa95c564. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITTL62330372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9188de5dd8ddfaf38d546915e67b12f27d52c19e8bd1dd24f150e3982159e19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHF2319675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb2f5b7869f99c0e0bc36d3706787528e6eaa73aab387e85973e8a406e285fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHI2329114.