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 0x3efe9224ccb0c3770f9b009f959467d568e6d009dee6de0f2da0f490b397a8c0. 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/718834c3-d485-4c5d-8f1a-9e4b3c9b7efd.json and https://artists.proofprofile.net/proofs/artist/718834c3-d485-4c5d-8f1a-9e4b3c9b7efd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Soundsmack Presents Volume 2: 8 Bit Video Game Sound Effects
Cartoon Sound Effects and Atmospheres, Vol. 3
Soundsmack Presents Volume 1: Sci Fi Sound Effects and Ambiences
Weapon and Explosion Sound Effects, Vol. 7
Soundsmack Presents: Footsteps Sound Effects
Horror Film Sound Effects and Atmospheres
Vehicle and Transportation Sound Effects, Vol. 19
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 0xc4b2a21808f867b04c003595bfe4aae4eff0d80a9f82eb3f91c7ceeda11d729c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USDHM1602457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022f9cffa835fdb33e71120550bff2f29b0598eac081c49ac641100a47401912. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USDHM1602464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903719221a5ec638d846805199bd78f1cb644005f7e6555b575d5938d0b3d774. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USDHM1602467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b42bb91683fe2511f9e1927dd07f7a317fc883b8375f72771b6b47f836facb3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USDHM1602468.
Large Semi Truck Idling on Street Corner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5957efc73102e69031fa021cf12c6195f1962988442213ef8ea438d163898f52. 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/USDHM1602472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff29653e1682269c06456e5da2b1719c3e34c7aa66a6807f37f954eab8fbe838. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USDHM1602473.
Bumpers & Stingers for Radio and TV, Vol. 18
Incorrect Response Sounds for eLearning, Vol. 14
Correct Response Sounds for eLearning, Vol. 13
Button Click Sound Effects for eLearning and Websites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb487c711f5b8c1b5198b1f328e1d9e0f4aa5adb9e267a9e280c62a196ca97d1. 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/USDHM1620218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d674db3e051db39db08d1a3693419d279e4e8392366c9e17017be8c3e48245. 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/USDHM1620223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf488c9000d5e4dff62f5d96e8f6c2b60c2ff05411a3f6eed92de5c745bf3371. 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/USDHM1620226.
NYC Subway Train Passing Sound Effects 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb68c8d5a6a79fc70a32c7f769ec3c54b67fab4e7595638bb4b62f0fd2e4575. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:40Z), 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/USDHM1620227.
NYC Subway Train Passing Sound Effects 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b40dad6882feda19ffe89c132adb08849954e8e1d75863665f987f125986a6d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USDHM1620228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc93bf0c089a58dc45a222179dd7195c6ebf6adfa2d5494eae295232840874a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:59:50Z), 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/USDHM1620229.
Cinematic Sweeps, Swells & Transition Sound Effects
Futuristic Weapon and Explosion Sound Effects
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb2976a14d35b2a44dde40cf58e7fd7a55842cefa6e0f3e2b975820da879db7. 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/USDHM1620433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae68eab0a037467c01dd339fbb800fba98de66e6287de23e0e6a5ca91d72a90. 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/USDHM1620439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67f85f874477cd7299c6bcc1e6eaba3052db6bf2dbdc17ff82aaedfc4c9060. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USDHM1620444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762b7de3961f3f91bf0860236eb7384db7bf96a227e8cc6cbfd31380a04c6b75. 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/USDHM1620447.
Rushing Stream with Distant Waterfall Sound Effect
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57b51b05c6ab30a7532556aa2b181913d2b071a0494a42b35b44334cbb35426. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USDHM1620449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f18a2e827cdd90ee60e2e797ff280263199c2113f89902a7e4c57c1de9e2258. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:49Z), 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/USDHM1620452.
Deep in the Woods on a Quiet Night Sound Effect
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28378bbcd1a21094da77cf5b31e8a7480b0d4443a0e8b657bed40ca1fa22a35a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:02:29Z), 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/USDHM1620454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c90c95dbf071bd9f22d43891d9ae24aa4d47445f446541645c531b8433e6e40. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/USDHM1620457.
Cinematic Drums and Orchestral Percussion