Wucan is a German rock band from Dresden. The band were formed in 2011 and have released an EP and two studio albums to date. Francis Tobolsky (flute, rhythm guitar, vocals), Tim George (lead guitar)
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 0x0b298d38b62ede84d84a27171833eddc991334c63f3a7889f05547b808054137. 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/9aaf7706-50b8-49e6-b0fb-4bc83f9c6a35.json and https://artists.proofprofile.net/proofs/artist/9aaf7706-50b8-49e6-b0fb-4bc83f9c6a35.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 0xea69622f475b6c04a9ac81812e1a23743e827153b14f1e88494b3cf1722215d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEAF71626247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97eda5e9e9f3e64bf791022253da85d658afafea77753bf5f94f8bd0f8399f2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEMV91503017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15582cec770b3ae1e4f220ee17eae83f2dfb652c3ec8e781b05f5bfd5f68d4a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEMV91503018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567662e1f51574bc93c6af221bc9ca3fff735b96241c13021b7a9a8f652f893f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:46Z), 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/DEMV91704738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dfe704193c727306e82f7b17c95c87e0765c793a0eefb0558773aeb6ef5d6f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEMV91704751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecd092da1c2582f1ede0b3a9323b348ae1355e607ebcce1d69371d095e84837. 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/DEA452200820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cc4b71685a60c72958e2f77076c1d595387d68481da6043d121f549aa6771e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEA452200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb497b875ac2bf6a61dd076d82134365b78ed2929993bf52e1bd9248d531f3f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEA452200840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1e20d2f2de734a9eb2d6e7836520a10ce15fd89b99235f3db00f7a4a2bae69. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEA452200850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b4c3819e1228d690f71c639dac2a832839cc16db3d9437a063a5df0097e1f. 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/DEA452200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3583efbc0b729290ce6d1a8db3e0b845d7959a473d5143418b52789ce44baec. 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/DEA452200870.
Live At Deutschlandfunk (Live, Isernhagen, 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4960d4955ee1677167a13a33c465a4c419758caa2aad3375c8347fe5c4565d05. 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/DEMV92200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9bfe9e7bf891fe8c53284bb0a3a780b54684912d8ec17613f65b4e671c46ce. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEMV92200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1684b6a5ddf2a607adf4b07f26628dfbabb5d91d38c2b3a0bc2019eb5cccc43. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEA452501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1664e20ccc5583002539367bca3f29fd8ec90384ec7fcdc3333f509e7db9069. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEA452501070.