Basic Channel is a German music group and record label, composed of Moritz von Oswald and Mark Ernestus, that originated in Berlin in 1993. The duo have also worked under other names, including Rhythm
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 0x683719cec5a03ddf9282e088b1954bf034a9bbe274c97d5e3f5fbec34f15f39d. 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/6c034531-b2bb-4ffb-a24c-237d87b1a79e.json and https://artists.proofprofile.net/proofs/artist/6c034531-b2bb-4ffb-a24c-237d87b1a79e.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 0x2e070cfe810ca8a51fb56d909f245cb4872166d83988cc1615d19666488f20ad. 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/DEW259300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580ce7d1529e882f59db3f75e4b2a51a33db8415e4a57851766fb9f2d2aaf462. 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/DEW259300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5ea4d525e5f8ebf21262c574b7a59a9353ce6eeb96289cb8400bd82cf1e4d6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEW259300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd62f4ec15770d2a50299006f71c9dbbec7d2d3aa67c9a83140835c9de2d8d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEW259300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98674488b73faae0453a8c7d9dcf77658a05d1cc71da2aa79528ef1116019c87. 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/DEW259300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef3b14975f2db52d4ce9238428b8ca8932dd75674051e740a43d88155cf6e90. 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/DEW259300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7c1172c3e8293f546508e41a2d837fef36514054572f3ef74ffa7b1d7cb3dd. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/DEW259300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0424b7ce37e9b293b3e6c62df04d6e37e3b8d371aa9bffab806b9c8b6ddf64ed. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:07:33Z), 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/DEW259400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a3f47af39ba5ca7205804e89317367d897750c529128e4e409f600b16d9180. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEW259400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a7b0ff18e55a030f0fb02b5cad6d1b9511a13bd8a6a53c3b1a6f50439c6773. 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/DEW259400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ffd5f9682d3892105bc2ac9f2d38626c1b549843ec492f8ffea1abe45b73f5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEW259400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068095bfa1784d552c0dfc24bddaeeadf74afbe693d1f430575a3a0c1f307dcf. 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/DEW259400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39cb908cf48eaa41cf5cc25360bc6114860891b31b78634fae0aac4d0163947. 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/DEW259500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7b43b608dc053055b71de2ce5554d33bb655e190ebfb83de0f0b01c6460ec0. 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/DEW259500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0303be4ffe0740f1dfeb371e60f2108c812ff5ea0b381de36e3cb8a660a197. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEW259500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463de653ec75ea9926bbffed3704146901718621c4320d6bf03a57d31b06575b. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEW259500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98da3886e7336bdd9e1cd158f41869116e0b9f88fdbdfe80b1a1553f15302e16. 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/DEW259500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e162ae93c8f50ed83a98993990c2e2bdbfb1d199625751aa745ee8ad97e5eb. 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/DEW259500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33b6eb9ed13469f89e84a7c7d964a116f543dffbccb0c94748d9bd68430600e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEW259500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70de1bfb7bb4553aaef64175eee7f62d31083241aeccca75b7ff833782f985cb. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEW259500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c037f4d6680acf661dd3907d07e5a915ffdca3577acc733ce54d4fe99981e7. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEW259500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02a4050f446ba097fbb91c9a2a81ded4b7bdc39823750d2b1d44664f773493f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/DEW250400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd270e220bfdc7549ab5192f780920fc0888c355c8978671b17fd6652e72961be. 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/DEW259300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068095bfa1784d552c0dfc24bddaeeadf74afbe693d1f430575a3a0c1f307dcf. 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/DEW259400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f13efed7c6cd93eca649eba9807c9adca1b6b510b44891a0117d42b7aa94972. 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/DEW259400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e86f353b129b6ca24ca1605a402816c897d60d243f702b036fad9f67787ceb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:16Z), 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/DEW259400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a3f47af39ba5ca7205804e89317367d897750c529128e4e409f600b16d9180. 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/DEW259400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e9edd2f22e62ac1206e1fda03b58276dd29098402201db7131831fa4275e07. 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/DEW259300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae52730e758c872b5e309476d9b16dfb83f8d59d4f9680f1cc51898e7f77f5f. 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/DEG931791854.