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 0x88736c3badebf9e8ec9dd0b9ae97fd1f3a2816bea16aa1142a1aac63322be17d. 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/9bc77584-0ca3-4e20-9fb6-5566da60a581.json and https://artists.proofprofile.net/proofs/artist/9bc77584-0ca3-4e20-9fb6-5566da60a581.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d082c2f919c151084814937e8c975fb58b4d6f8264d48738af1ee710bea02f4. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/AUN6Q2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676238d9636d38e981461bc0587d7cd7a189b44262a7f65668c8d8fa51009b93. 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/AUN6Q2400006.
Fireplace Sounds, Medieval Tavern Ambience
Swamp Sounds at Night: Frogs, Crickets, Light Rain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9de28b8de5273a35cb5f5e2e9ed5e80d0bc59b83913f3461148296a2bf7ca06. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:35Z), 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/USHM22296517.
Potion Shop Sounds - Apothecary Ambience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0266b52043ec5c5edb7f079e48444b026a166cfc38466c6201b9787814e5d14f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/AUN6Q2400012.
Rain & Thunderstorm Sounds | Crackling Fireplace
Rain Sounds at Night: Mountain Forest Ambience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aecf7c9f1afe875121d8685eedd187f3a51572927fa71955c27cddb952d0bb. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USHM82257402.
Haunted House - Heavy Wind & Indoor Rain Sounds
Mysterious Forest Sounds | Fantasy Nature Ambience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7f80d05e2ce8560856f2567b50cc162ced59e9920382d2e364d60c81931772. 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/USCGJ2213464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b7ea545ed0935d7e78fb825860b4c56c0d2a2fbd4257004ac9f668201276c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USDY42227757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4750e8b950d2297dc9d8d2c5a97db51ac4fb1457283c14265f60cd235856f2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:38:44Z), 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/USDY42381692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cbb918db260a621bb9819c3ac1b46fa89b6c920defc973ce8d108551d11d01. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUN6Q2400027.