Steff is a given name which can be male or female or a shortened form of Stephan or Stephanie. Notable people with the name include: Steff Fontaine Steff Frost See also Stef Steffl de:Mihaela Ște
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 0x221cecea06ab5f00a36ceef4ae8fa38e83eadf246c13ef0861e192dc24ebf4fd. 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/df55ab56-e91d-4ef7-afa0-bf7f46909248.json and https://artists.proofprofile.net/proofs/artist/df55ab56-e91d-4ef7-afa0-bf7f46909248.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 0x3e72465a02f90b8bf08321c57f3a7b6c178c89bf351274ab8a4da2d741b92100. 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/NLJ2H1500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30014f2183d9cdb5c9482f736d43177d01c69f212de709bd4f8a6e387b05f64. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NLJ2H1500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4858b832495eda72cb64568be13051a2948869b2e668d0a8bbdadb59f37019. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLJ2H1500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a2ca37eb14d3413a349dabacb71c6198f00f4003ec491eb64ab4fe39ed1bb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLJ2H1500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbcbc791977a7cb9304efbee3d557f361fcbc95767b6b93b2b27e1821958e4f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NLJ2H1500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a225ddfbccf86e3d10c39bd04468dff91ba26a3ef00c480b77994eb7226a6fb. 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/NLJ2H1500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46c5e70c01ccf2fd5f0d1101d41c4b50aca88172f5b7eb63c73cd6015d2c5e. 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/NLJ2H1500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad9210339825a00c0dc1728a707097ebab196c39c85e08e67927ebdb33ed6b7. 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/NLJ2H1500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63965ff69d1096c8d765d5211e6eaee2a066b618e4fd90f18d7a7589f57b664e. 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/NLJ2H1500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511ee966b5ac518cb880ad18d0725716ee98f03fbeb84473234211565edd1563. 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/NLJ2H1500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c17b639c9665a45e641cc555f4f6f19089f2020af1de4b69a4a1859dd125b1. 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/NLJ2H1500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6826af0fda183b0318cf1440cab82267e948ccaa0b48d140d2449e8277789e2. 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/NLJ2H1500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d01b9510c551e4efe683be6f5ec616be9521a13dd398d95fca64088d6e2be5. 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/NLJ2H1500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a87dfb7feff4f7478076a3d73ecb0de8e0999f0ac74cddf22f96b3be15bdfb. 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/NLJ2H1500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe64f6b26fc4a1cf44bb7d4389b6dc8e9969c58b4269ef429743ded86466d631. 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/NLJ2H1500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289ad2107fd6fb4be882f03be9e6297560d55d12b24a5e75eb893a8c0d2b9a06. 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/NLJ2H1500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a875be7f4021858d67e65ab3ca0b1d2b85cb70bae41b03d4514646c48da3f1a. 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/NLJ2H1500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd305bc52ecb3f07828308dd8d50cf1b96ae8dbdee8def56ca14f359d1fa2a785. 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/NLJ2H1500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffb6323e5e297b5c4a603ce42ab5a8b4d12fbefd88f2db0eea8db9072778dfe. 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/NLJ2H1500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbac751ac103d281bc608087ddc1522644744ba9c7e30fffe7dfeff5f4881bcc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:31:43Z), 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/NLJ2H1500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45337eaaf485726f536117efae17672b4ad854bfca19ed961df343bcd9eae0bd. 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/NLJ2H1500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e53388dd0c38c2545849b808895e87dbabe1d23a1b98073feaaca2673f138c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:49Z), 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/NLJ2H1500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8be0607d1bca96422475014b44d7a234738f3fcbea0996adadb6dad8b9d6fc0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/NLJ2H1500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61aec2b65ee0ec45d63e44b0c7a71b1e1efc1dc2213056e44d3a217ae85a944. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:22:59Z), 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/NLJ2H1500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ca68ab3875dd77973e00a69530030c226c2d8fafe3fa072ccd854611d5748d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLJ2H1500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d827ffc079b43cad2983fe0829bd967aa8b3fae4cf6b498ac4b2200c90b023b. 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/NLJ2H1500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34b3f51ecbcf203e285c4a496eb862132de5e47e411325dece85bc73b13a709. 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/NLJ2H1500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf746d66a37b041b4c7988cfc13f61c9846d7af17b0fe4417d1ce393cb9202c1a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NLJ2H1500223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa682bb55d0d78d9dba762d46fbe0a3fd976f9df8933628d0f715db8438422cb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:57:14Z), 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/NLJ2H1500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87fec3905326dfc0b85c152c785a30a63030493989d8812dad4812701874fb. 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/NLJ2H1500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef9af964ff5e0cf07d5d4b3aa4d27ba7c065275445ca183913aacc11544041. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLJ2H1500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a7911cc14c31c2f5adea98040fe525e5a2f94f2befab05da4073159014818. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLJ2H1500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5625ea155179c23f03d1ac5338900f9860fe15744f89c3b64518d170aa2f9a68. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NLJ2H1500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa2c271791d671bd8a19ac006c2b4782866aa71c85b637a24f12bf0f279303f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLJ2H1500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb7b2f9fe6cffeb8616b5ad70f4103e44e12197352935dc9345a8208d33089. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLJ2H1500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650fabe2dc9f4d96ec23c6bd446ffad755425215308df4fe104642fd2d49c19d. 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/NLJ2H1500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650fabe2dc9f4d96ec23c6bd446ffad755425215308df4fe104642fd2d49c19d. 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/NLJ2H1500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc63a0161bb8ee2df5dbb22ba860b438bcf5b1d428d5c09e76c9aea0b95b6f89. 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/NLJ2H1500145.