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 0x48602313a920fbc576879f86b50380b4d386fdab4bb053848f1466e7133c38d6. 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/38a0c62a-e938-4f7d-9e23-0bf9e3f58549.json and https://artists.proofprofile.net/proofs/artist/38a0c62a-e938-4f7d-9e23-0bf9e3f58549.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 0x3453ba79b6c6e4abeacbd128318593826fb728decf0db82484dba88591ed8837. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMHN2081776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb19edfe2a417ca78ccde50259c0d34e877e7d8b7113eb4de8c25eb44197ea12. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/QZMHK2065890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a2c75de2e183d2e74f20481688647ad2e9cb7dbf7b5f0cee8d1c2d9d5fe7c7. 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/QZMHM2015537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3035ac4349d046fe86e83753ede3f0c9b81ca2721173129263e59086448a039. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZMHK2098250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ca0751a507142e614aea530f64dd5407073f70fcb747e8923a48184d1ab065. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PL66V2421904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa439d2f0db289cd188ab28c73f6952cab6b3a3d0770cea52b3f7d71621eed7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/PL66V2421907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda68aa7c65f4f82c51bc8551aeaf624b7d223f2fb48fbf516d23e4844199c3f3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PL66V2421908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe061debddd1aa030580f9179c6142505ac0b98520f8611e8ea3bc1ae5079886. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL66V2421909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b52f087e0ecc212b6365fbf7dde0a9455ce87dcb433929d6f0e56e87e4975d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL66V2421910.
Dreamscapes A Collection of Soothing Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5940d4b7158a55b40ae81ec84a12aab5cf794525276f575962ee625b1b9e2d62. 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/PL2C12347672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe664f83cdd5aebb5c086cc2de3b35a57e4d130cbde643a103263c0f25882aff0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/PL2C12347674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69582b73b6a57d2b5c0e6f4bbb58f932e7e40e7970e750f3dbeaedc4aec74b5c. 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/PL2C12347679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dd953383089f524c536144f0612b722eabc9ac0a43f20e76393b857f6b337d. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/DEXO42418118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8d900b5cc21eeda27960d515c713287d2e7f603c2574d57ede9bc1296676a3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEXO42418119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a9050f7f7b79ec426997281199f3d2ff0c3b388665ac57432b7062b5dc28a3. 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/DEXO42418121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16777bf0fc504ddd4206960be1875ade197dc2fff53bd802af3582bb04e5b2c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEXO42418122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb991f634b508c546205d23e07baf804ca5c310dd7c1b9157deb1a4be8fbdee. 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/DEXO42418123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9440ba383b5fd06f707a1d08b5acdd2ca0a1ea779329a2056401a87bc7bfbff. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEXO42418124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85868f6c4a3a03c959345190120751f244871fd7e49c660da3a88577193ddf96. 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/DEXO42418125.
Appliances and Nature Sounds for White Noise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf294886af0c613ea6d18a47fb3df1193596eb0a9d14390beaf176b5c76000c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEUE22342460.
Brown Noise for Sleeping - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bf1a82d50baf4fcac41dade0cf7e1e2e5542824ad73e586207a47dda19e2b3. 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/DEUE22342461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42f1be567ea4e35d8ea54a83e711416da90113fb4d3fd50445b549b942fbea1. 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/DEUE22342463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5902ca393dff19f53805133ee6c638478cd76345cadccb81857dd77435304355. 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/DEUE22342465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d23ac9c6eea6791e264da55008f7fa36bb18e0a40468a7809711da1e0dc22d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEUE22342466.
Deep Space Brown Noise - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb714f4c2728c1b0a95149c56b994e7af3164deae8bc8ac02c6ca841f79b67c29. 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/DEUE22342469.
First Class Brown Noise - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a8ac72c674c3ccde1f92da2d653ca5e63a4ad04913dd28d5b3e395d7dd5a98. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEUE22342470.