The Cave Singers is an American band from Seattle. Composed of former members of Pretty Girls Make Graves (PGMG) after its disbandment in 2007, former PGMG member Derek Fudesco teamed up with Pete Qui
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 0xf52b54b1f4c43e5cb82b2286b2d83d9a39a718307a3e8d2c694078540cfd8814. 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/cc2db79b-cc2a-45f4-b01c-287d8a442702.json and https://artists.proofprofile.net/proofs/artist/cc2db79b-cc2a-45f4-b01c-287d8a442702.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 0x78c5e931be150e52a61c1e7a5a0cd63998dcf29d15d00ea31f8e696bfd520512. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USMTD0777101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f5d89c1372e70831ca9a8cdd090aa7d47c707f190d5ed70d6de2d821e8607e. 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/USMTD0777102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bf69e35dcd6cadb561d121b4795425260065ee5dbcb83f8b0a9d9bada85e23. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USMTD0984202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4873d9b15940a4812ebd73d68090c0d81e9813de4168dc5001853e046c9b3988. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USMTD0984203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7306d816c9154f68dec0e45f9abded9529aa1a02be57ded5f55451921e46f1d2. 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/USMTD0984205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e7f400b3a86c2c102e29c4220bd9b7ef422c2cc8d4b52eeb5bb2af542467f. 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/USMTD0984207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f783cd03e49e7b5087434d5cabebace0011337363f5d74f6e53c8ec7fd97950. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USMTD0984208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0143ea59ffae59964ee5d966755c7f024b8518f4f88b1ee3ed063de3e9ea9d0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US38Y1117601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4506e9e46c3228d47cb8d6577631fd241bddc10e7c245bac1a595a97ef3231ce. 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/US38Y1117604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bfc314f8831e77137992d6b368f0ce759e47c97698593b3a31c959c52bc6d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:31Z), 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/US38Y1117606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa229065d39132cb39c2a6c2493606f42e65b7f08d5c7e3f8fa5ea9b5151595ea. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US38Y1117607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9027af1e984bd66deaa0dfeb7e6264010257a777227ea0c2ff415a3172e13c18. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US38Y1117608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75c68dbd90487b8aa46c089252699d1d0fedac7ee937293c217ac552b27e393. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/US38Y1322301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf970f1e695f82600111ad08eb5d4dcef64d1018d65e53d980f35390fe27dae0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:07:21Z), 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/US38Y1322306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cfe8eecf8728f7646cb38f1276224c0001fe6232ed616a30632f8648448684. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:37:41Z), 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/US38Y1322310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ffb0d43bbd700b1dd0a5bcad9ab9e65ea1d6d1aa852fd2ddeaa2ebcc0f1c30. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:08:45Z), 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/US38Y1600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af84bb99bb2c654ca63e77310e713cb30ef176e7a0067737dba673141728e2f. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:50:22Z), 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/US38Y1600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb68ff0e8d384f8926df9994af902cd82b9dfcc6b4e94ad03a8c6b9808471c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAEM1965046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07463acae4a831f906ee277635e6f63f34a48ba0111a7c7474982102b628268. 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/TCAET2009988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811498a6c6035943e16372fdb7747586233d20041cb1838b0fb5f5216c6a005. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM80996423.