El Cuero is a Norwegian rock group formed in Kristiansund by brothers Håvard and Brynjar Takle Ohr in 2005. As of 2017, they have released five studio albums, one live album and an EP. History Form
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 0x7f116c890e47afb69041b42664c2c67f0e787b0c931e63f27ee8ea4f5d98beab. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27f6ef63-3b86-474c-bb43-841bd2f4084b.json and https://artists.proofprofile.net/proofs/artist/27f6ef63-3b86-474c-bb43-841bd2f4084b.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 0x985c4cbe85fc71989481ec099fd801b60220d409e40086ecf0060b2a0a544071. 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/NOECW0701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901bd3a436343940db4099d770e27106d4bbce142cb7c3482e52bbcee79e4755. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOECW0701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913bcea4e1ad1f68d5e2ebb3aad1f418cc12abf5267bd24dca19628c927c1c1d. 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/NOECW0701070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb39b70ca2cfb6adc7c1a17d7bdc36e4a354dd0dc68a31745bdaa440f4268d9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NOECW1204020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e96e11c8b06afe10b4c4bb99d374c8a15c2b7e74b023c3c49d941f123712c8. 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/NOFVV1723010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780f7bddd9d6957198532959579edab08a92c54fe8efe1b9a40b4e13a48d8dba. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/NOECW2310010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6ae40a6e19a6e50227d5b3e64e856dc6b4db429962802a9a5dd3f4b8f66dc9. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/NOECW2310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a96f75e466503bc4930ff0862a713a3c67a9399909024c77937ae120ff69fbc. 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/NOECW2310030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042b1b02339514b1a18c94a1436f988dea8db34eaddf357aa5fc817358776edb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NOECW2310040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd80d9a7e57dd47230bc8b1f753e2684ad4bdc899caa8e72d6cdeb5ec4eaec. 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/NOECW2310060.