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 0x2e2f90c103912fa3005000515d186246aab142f1137866989a79dfa147cf62ee. 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/e3713c7a-3793-41a2-b09b-6840b34c9309.json and https://artists.proofprofile.net/proofs/artist/e3713c7a-3793-41a2-b09b-6840b34c9309.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Great Sound Effects of the San Francisco Cable Car
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 0xc065b5235493368d71b7bb37ed433333c13a6aae3ea4e0ddf115b795daaa79b9. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:16Z), 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/US4R30906378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018bd5fb69fcc92a2e01d230ff444f3fd28a1ced5db7ef4f15bd834917751ade. 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/US4R30906281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7be5cc85f70c271dc4466d7a6360084ea7906677d1fc5b8010436ac608b30. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US4R30906282.
Amazing Sound Effects of Fire & Emergency
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f67603c61e80978bf274bfd2cde043590b2fc960a9dd665252960de78ea58. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US4R30920748.
On Board Fire Truck Going to Fire Scene with Siren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7afb4da31b2aba1afdc23ce0cf89992c15a3cd60a6ad41e7bf68fd114f2f80f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US4R30920779.
Fire Scene with Siren, Light Radio Voices
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545603c324df5883da538d0e12a97b177cfd88be6e0ef14005bdd6c70b24df25. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US4R30920784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b739de6a30b91826877088e8eebff42c12253189de28d332080f932c113421. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:55Z), 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/US4R30920043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff0b0eb802d97651439620c695d079376a9df6494c9773930ff7df91cd4c0d1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:01Z), 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/US4R30920055.
Search and Rescue Twin Prop Military Helicopter: External Approach, Land and Throttle Down
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2604c80f47c674d7d1f7819f3d87a46d86ed850a85eefa950068ad0d65d101a1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US4R30920074.
Amazing Sound Effects of Monsters & Dinosaurs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ebc09eb1417f5955db41bc1e45d0b67abae64edad43548a50078cc0662d79b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US4R30920288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d20dfadd05d5f95881fbf5664f90df2623c93bb545cdcaa30fd7db2932b659. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/US4R30920293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e0d221738657344c8612f9ac22cdec8fa85edad3a533b04aa3e5b82a30a365. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:54:23Z), 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/US4R30920123.
Large Outdoor Stadium Crowd Applause and Cheering
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20741aaa383d1b7a3a1dcc0bf55e4a82cc9945f636226617c37e9cc64c37e771. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US4R30913076.
Amazing Sound Effects of Vintage Airplanes
Amazing Sound Effects of Crashes & Explosions
Amazing Sound Effects of Science Fiction
Amazing Sound Effects of Bells, Whistles & Alarms
Intruder Alert Warning Alarm Sound Effect
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8914296efb7202edb1e77bd22fe5737fb279de90142878edf4d7a654606c4d7e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:56Z), 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/US4R30913114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f23b19c5f750893913f26b8951acebcbb3e9107c5451e9e0eb66192bf2f759. 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/US4R30913162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f0e84f02826dbdca141bd52a1384c67a5b7c7e48418bcaabb30e1a2596f95f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/US4R30913167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840e4e3694158ca3ad6a8518d6852e855da9e957125d5a1ffc260d0685a8f9e9. 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/US4R30913906.
#01 Static Sounds for Drowning Out External Noises