Thunderstone or Thunder Stone may refer to: Thunderstone (folklore), a worked stone object often associated with a thunder god Thunderstone (fossil), the fossilised rostra of a belemnoid Thunderstone
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 0xcc6c249af4d7cf8ad7607866c6309b49e2e4bef5d535fc1a98250a1705cfabb5. 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/33fdd157-fd44-4af4-bbb8-7031009c0f4a.json and https://artists.proofprofile.net/proofs/artist/33fdd157-fd44-4af4-bbb8-7031009c0f4a.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 0x8b651d4dac128b2c1a0ebb7d18dc263dcee71bf48ee67f1cf77157425b52dc80. 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/DED830274103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e482c303d94cf9915a576cd9a5ffe97b429930933668bd4abd4c93a76eb64. 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/DED830274107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d5d3652fd677e848b66bb55a93d8cdbca8269b9ef6fcbcc8ccbaebd86a830. 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/DED830274110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500a07bf3dc2e669df389dd942e7c9966e03de8f7afbacdc1aa376d39f45d179. 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/DED830370102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35107a98ef4339a8a386c827971f979a88ce929c65a62405671108db37489549. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/DED830370104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98849846ce19c353f9bb1f905efb129fcc5f6ad919efd4237076b49328f8386e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/DED830370105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf4029c751e7340f4f73a58599c719929082e8c7232a14b66c06e3b7da9131. 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/DED830583504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfac31d868941169d2be79e0daa25def08dcf1abf7813f64ab3a4df981cc335. 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/DED830583506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2529f4bf3fb124a2faa0f04473c992651c2b628414eb358682a2e9ffdbc84d0f. 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/DED830696502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3efcfea48964e75953099660c7927ba731ac7a0c7f72500e7e0c491f9c1011. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DED830696504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fa9bb59dec0e420b7c708cba97cde24eb7869c385bafd461727cb50b85d0da. 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/DEU601606159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c607401c2cfb4c3490e2778a7cbb5d5a33b022d9ff5ccfb7158e5bde470bd1. 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/DEU601606160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff1bc1b644aacfef96a4757846bd39753a6f750e2fab5d975ee2de6f7612293. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEU601606162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ca161a6dd0c34ad498d94bbf0a48b92812197f7c09e38065b8fc9d4978ee17. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FI5ST1600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22891c099f95d1500275c0c91746d455d7aabf8e331b6290fb8d255d223c4925. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FI5ST1600021.