Narrow Head is an American rock band from Dallas, Texas. The group was founded by lead vocalist, guitarist and chief songwriter Jacob Duarte in Dallas, with the band now based in Houston. The band hav
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 0x9e16881945f81dd0c953b95b3a6f96cb8a0ab03c1240c15eea307615ee37e51b. 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/6efb7e94-057c-482f-8132-d9191dec452a.json and https://artists.proofprofile.net/proofs/artist/6efb7e94-057c-482f-8132-d9191dec452a.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 0xb7b7d9c2a8fd9a1b34047bffc936054dbf338139d7d31acb7929fb51b544a8f6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:38:46Z), 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/QMCE71302851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf88d5ffb95df64b7df983a633cc2beeac60a1ca20ff34939115413aff000568. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QMCE71302857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5439c3fce6bef7c57adef35a0e2698110e0f3ec6202f5ae224f64e6ebac87c1e. 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/QMCE72224504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90bdc3eab936321aa272299136e6b02342ea868a7ede5b95e0c435ebe5ac72e. 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/QMCE72224505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f88e5b71e3c33de303829fc9897f7de1e18f86ba93e58a2a6f5f956d2540d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMCE72224506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3ac302636a393f7153c0a2157c5a89ca3df9c1f01b967cf8d32a301cea2c7. 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/QMCE72224510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874b481cbbcd58d344ba7f8c371541ede509cc22512b237e3f61b7448097222f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QMCE72224511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6245f5ce54f22fef3ffa064e91aabdb696e83094f83bd1b64285164e6e35d665. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMCE72224512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9a50ef7c8e691493fb6ef7e56a3c1f679bd16d711013c4e480a75c369bffd9. 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/QMCE72224501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04fb80c6cdca64dde06afe877c87cc778f4bdeb5d8413d3f112eae03bd63623. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMCE72224502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf297d67d340c7667aa5a8f13c1d39be0164ecfbd414e637f1970031b262dd6e. 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/QMCE72224503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5439c3fce6bef7c57adef35a0e2698110e0f3ec6202f5ae224f64e6ebac87c1e. 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/QMCE72224504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90bdc3eab936321aa272299136e6b02342ea868a7ede5b95e0c435ebe5ac72e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QMCE72224505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f88e5b71e3c33de303829fc9897f7de1e18f86ba93e58a2a6f5f956d2540d. 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/QMCE72224506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e52ae254241a1a7fbcf8d8b3f07cbc6f8e020eb006d82910d31a17c804324. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMCE72224507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9cc70ac9253aca3a257267a9a12228d5345ca3dd6fe7027360f92e0556888a. 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/QMCE72224508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc77cb794a3b697cd644ebe7433ad47d69935445c7def8f2ec79e45bd12e1be. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QMCE72224509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3ac302636a393f7153c0a2157c5a89ca3df9c1f01b967cf8d32a301cea2c7. 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/QMCE72224510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874b481cbbcd58d344ba7f8c371541ede509cc22512b237e3f61b7448097222f. 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/QMCE72224511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6245f5ce54f22fef3ffa064e91aabdb696e83094f83bd1b64285164e6e35d665. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QMCE72224512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5160561f94ef51fb4ddff7934c029a5ae25aaa143854430eceb3d28a1aa3a44c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QMCE72224513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea968023498ae638cbd20120d00dda817367caadd148314ea390584d9791cab. 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/QMCE72224515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5160561f94ef51fb4ddff7934c029a5ae25aaa143854430eceb3d28a1aa3a44c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMCE72224513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea968023498ae638cbd20120d00dda817367caadd148314ea390584d9791cab. 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/QMCE72224515.