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 0x8601eb6ec7d5380b566c245639b392d005b0bdfd2bd28af8d9a874709ddddfcb. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4951d0c0-512f-4dfa-950a-1a25d77b471c.json and https://artists.proofprofile.net/proofs/artist/4951d0c0-512f-4dfa-950a-1a25d77b471c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Factory Sounds for Background and White Noise
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 0xd42927f476b090dad1e1e5bec1c7c958b3d581bdf7cf084d780a496fc0bec961. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMHNS1315033.
Refrigerators and Generators for Background Sounds and White Noises
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f3d85ecee9a5ed425141d3362d0f6c3fa78a50e0dbe8cb7b43aade1eb67e66. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMHNS1317412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f6cf6a27574015240f665cb4964240c296c8db84f02c5182d7a89eacf2d38f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMHNS1317415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39d8c098e017628f5c3a01f4fcbc18d0a89bddbc2c7b7bbd9bbbacb359c4b9b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMHNS1317418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ed0847995ecb3311a7aa778d2c18c6ab623a7c252e1fb85e77076ba7c6d6d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMHNS1317419.
Small Indoor Waterfalls, Rock Gardens, and other Decorative Water Features for Background Sounds
Asleep in the Backseat - Listening to Car Engines to Fall Asleep
Full Volume Hair Dryer on High [Stationary]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88abe6a8dc080c9f3c8091ab3120b2b3269a0ffa2ec3708f2d328a804ae82d33. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QMHNS1315227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23498ecf62122a45176415f851ac84393a63306a90948d3a23bf664cce0778b3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QMHNS1315228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed083538b90a50fc66315a901b5bd3980078b3a6c198636a8e7716bc7c44c5b1. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QMHNS1315231.
White Noise and White Noise Alternatives
Appliances and other Household Ambiences (Loopable Audio for Ambiance, Meditation, Insomnia, & Restless Children)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7021823ed2ae5d036c7bdbd2644b5520d35863ab08d9e07686ac810c9c6a6a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMHNS1301047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b425d3b53328ae50e096d3606a2d7959c647b1abf43e5da1f6b0956b45cc633. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMHNS1315220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6200f57ef43180375cd35f7f09045c91213c8a6ad0f6fccd57e7cd94e56ad5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMHNS1315221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb8da5d2325ffc8b689613398533a0f310d6b6a428d57721db2bf56a93b5069. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMHNS1315222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56a9cf2ac757953dc70c8d7eca5329f98559e8c31ec6efee44b0fbff7e921da. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMHNS1315223.
Shipping Yard Sounds for Background Sound and White Noise
White Noise Hair Dryer Collection - Loopable
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0173e608e1f2997dfb41e45544d6b2168e88d4d4ec0776e13ec4da95503fd2cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMHNS1317413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f3d85ecee9a5ed425141d3362d0f6c3fa78a50e0dbe8cb7b43aade1eb67e66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMHNS1317412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f6cf6a27574015240f665cb4964240c296c8db84f02c5182d7a89eacf2d38f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMHNS1317415.