Dolour is a band led by Shane Tutmarc. History Dolour was formed in Seattle, Washington, releasing their debut 7" in mid-1998 on Theory Records, and two self-released EPs before releasing their first
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 0x1644a2acea21adf523121e5219b97f50473a26049654c9123ccfd2a1c8f0736d. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fb3c7f6-3ebc-4644-804e-05834bb79239.json and https://artists.proofprofile.net/proofs/artist/5fb3c7f6-3ebc-4644-804e-05834bb79239.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 0x009514c4891cb75447e925f0ef45283013ea97436c87dd44a8f37191430e8ab7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM21645296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9712b264f7d5ff815a8d424c18d08180fe18767812935647d5423d0de5ee6f00. 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/USX9P2047973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed40e888a46fddea1e94b98baae9f4502f50fdd04162ac433a93fdc7ed8952b0. 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/USCGH2158299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d619fba210dba799155f9deed5d67f224ca321ac4d7804fc752cdade025b080. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USCGH2158302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58245791e43b3c3463d9eca1896263d488eb979dfa8afab8735500dd49a12ec. 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/USL4R2231529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa414f7748019f3f4af2d219862c6f6f13cbcfebe7ce272e8f4cddf4371f8d61d. 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/USDY42269897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4420585b14002b30a62f2f1bcfb5673a1d442615f4fb84e184f873ec83c5bc2e. 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/USL4Q2348674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672ac5270210aadcbf4e8182b575a645a497cf420b38c6288459b3d186b6faee. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM22305737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4420585b14002b30a62f2f1bcfb5673a1d442615f4fb84e184f873ec83c5bc2e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USL4Q2348674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab8330783e832d041de2273c74903b3799c4957f24c4ee08ea6ae1b0dc677a2. 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/USY242415826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01247fe220fa0fcc29dfac3f03c408979d6de4c3114519bc69ddd7e80885f6de. 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/USY242415829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34ac5e1a86b1386a86b887186aef7730eb5806768469f0e61f6699e753d333d. 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/USY242415832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672ac5270210aadcbf4e8182b575a645a497cf420b38c6288459b3d186b6faee. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USHM22305737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58245791e43b3c3463d9eca1896263d488eb979dfa8afab8735500dd49a12ec. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/USL4R2231529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa414f7748019f3f4af2d219862c6f6f13cbcfebe7ce272e8f4cddf4371f8d61d. 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/USDY42269897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb211310f0cf60bb9a6c13f190ad8105ca654150360f56f01c323684f59dafb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZMEM2579986.