Ethereal Tomb is the third and final full-length studio album from Florida death metal band, Nocturnus. It was released in 1999 on Season of Mist Records after nearly seven years since the band's last
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 0xd763ca47e6b6073dd88b3d502b173d40bb161ce33d00d6604500cd8340f629c4. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a0793f4-2afc-4942-8d9f-3328e4b521e1.json and https://artists.proofprofile.net/proofs/artist/1a0793f4-2afc-4942-8d9f-3328e4b521e1.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 0x9836aa91d7ec67fd8da365379a92ab2af8cdd0a0c1ccf3d2fbb0e370d16e5654. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHZ52221870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4b5a39721dd04ebf189a4029e54a8d79af45e0afdfe4b321d29631341dd62d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:27Z), 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/QZHZ52221871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2433716bc210dad9a113f6d8bf7be2d0705327471a5ec841d83bfb1cd20349cc. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:37:09Z), 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/QZHZ52221872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c89546e87caccb7024156ed1a6f4430cb86e7a33a919dc6b70ef25683372a7e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:33Z), 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/QZHZ52221874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed883c0c72715ad9b56b2b7a03a8d27e3330ed8b281a977f5b98f6e9958f97. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZNJZ2212528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4e10237ad75c107c6bcb2d5eada74aedeea353f65830fce54589eaa81c3493. 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/QZTVM2256426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282f165b473dc27f0418f06a4cb1298fea0b81bdb3a8efb810b73c44169189f1. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZTAU2304874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb8fe47464b616907ce6d022ba4b312f096fbe50e792663d3698e892b4a18f. 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/QZTAU2304876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450b7edd77fd8d6aaa8004f8f64a8953dc29f7eb5eae1a13382a43b5c8df2733. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTAU2304877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac33959f41a3638b3a02f070cbff715b1eac90d9111dbab4c5c197c39d6ea55. 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/QZTAU2304878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bbc64d39b20c2bcc4fb282be0495846bc9bf5ee4479a01e4bfef2e848e454a. 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/QZTAU2304879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4009b1e30e0e4266e08ffe03fa856da389b5ef9d95ddab029117c1be4f6453c7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:52:14Z), 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/QZTAU2304881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab0dbc6293d697da7a8b6ce8204e7c78bb21d2b6d4b2cefd908c43ed876498f. 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/QZES82463217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5495e5307616496b74426d3bd2810d06b7260d0e27fcaccfb8ae2272496c0e. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZHN92472974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab0dbc6293d697da7a8b6ce8204e7c78bb21d2b6d4b2cefd908c43ed876498f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZES82463217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbcbb348666bf256cbc20991e621329279bfec7762d662ff827c8fa9ccbdf8c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN92472975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c792516072fe91966683ad76fb51ad06c11be0a1a7c371795370fcb6fb3a43. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:20Z), 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/QZHN92472976.