Grand Cadaver is a Swedish death metal supergroup formed in 2020. Made up of Swedish artists, their sounds are based in the early Stockholm death scene music. The group consists of Mikael Stanne, Chri
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 0xe3d4db3039b779968d8d792d92f3c71f38a3e19d1bf965c4fb6c50882c7dca55. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb235335-5015-4753-aad0-cbdbbec7e0ae.json and https://artists.proofprofile.net/proofs/artist/cb235335-5015-4753-aad0-cbdbbec7e0ae.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 0x4c667872de56a197eab5a105fa56e608d7838fd9b7ac557e02b08812fd7456e6. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/SEYOK2047445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832f09adc2b27921eea8fd18deadfd2f460503cfb4b0853e859205902d44b4c1. 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/SEYOK2047442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eda3d5eec1582a145561298b15309b2b03ecd2f78cec4c6979a812cf7ac4bf. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SEYOK2140103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc410d710018b4a86ec56ec6d7b4ad6e121960bf1ccf2b87a788959c677331300. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/SEYOK2130272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2cb87e9971e0f44d1731d29fb2f56072ae340e96c96694c481dc0d08942503. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEYOK2140106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c15e316f91acb5326ef85c8e11b7192e0d8570c75bad4412cf1d6dfbd4fba9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SEYOK2140108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69613a64b09d50c093a12a71100177a0ad9ee768071f362638edf78aba108efd. 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/SEYOK2140109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0302245a3c89d5abcaff8055673630622424ae25bbda3ac15c94af9576806f6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE5P52227202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8045cf757421404542c4df1251c6a16166d6cc6acb3b1d29d2ae91cd0dc6feb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE5P52227201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0302245a3c89d5abcaff8055673630622424ae25bbda3ac15c94af9576806f6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/SE5P52227202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e887bf1c9ba1baf48e14d0ac41547a262e110a1bcbeef50d74981ae0965aa. 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/SE5P52227203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31188cdc8af01348deb4cdfbd8ec669ab02aee33807cee5258ffab8536594b. 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/SE5P52227204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0b3f69e7fa10c60bfa0c4759b2242ca1c15611fe732a9adf90747b36f63ce7. 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/SE5P52227205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a223e4a1e232b9ad4e016ab2a2f8de7e155a4db9fc0ac00b182516b91b446. 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/SE5P52227206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab0578aad054fc3f4fae0c932d46688a08f04f47f230ef5a3416950a0e0532f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SE5P52227208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c57bdd1ee72c3b8d665d217c7a7afe49e88fe2ee3b7de156754afa73fce8eac. 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/SE5P52227209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe71c748203a4956b2c771a7460441379dc6cfbaf2ff5703e77458ceaf08d5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/SE5P52227210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0891373e4f54f2dcc7b7433db23024e005aee39a4518d3f88176ea650ea39b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SEYOK2406682.