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 0xb115c1f029bbe2be1f468c96e1ec25836d1a7a559f04dd7f549eb44d4cb5a825. 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/841f0df6-f3b2-47c7-836a-95cf0971dd77.json and https://artists.proofprofile.net/proofs/artist/841f0df6-f3b2-47c7-836a-95cf0971dd77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Energizing Train Ambience to Reduce Your Stress (Sound for Sleep)
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 0x3c2f7e94e16fb2398ae8a218a3dc9e0788a8b0c28f7e68a4a9912bdb9782db67. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PL52J2285449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4599620915253ff95cb0dc4443df581f00352f2f98aa857a2a8ccfd0774554. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PL52J2285450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28a9ed999f90aa624ee6dfa6fd9fc7f1f11d6c17f6c7fa6fd6a872861cd1639. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/PL52J2285451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328d52ecfd908552a273b105e13385034b2cc4e5a0e194b59a4f08fd69cfa388. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PL52J2285452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefda4914f6c44f23b0d6ca55b8f95d00f5f61677faaf682a9ec1f91affa8593c. 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/PL52J2285453.
White Noise Train (Loopable) (Sound for Sleep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa0d41d24ecc778dbecdffd5c447e1e3a9d7dac4a908a1ea257b0b48a911082. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PL52J2285454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33121d278af68da41d884493d8d7ee7b0fd956e52d7f539cb3730cef754d3d89. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/PL52J2285455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1b8d0a30ce7411b93dcb9159f1994a210f91b0655cfcf91245ca30055f8f10. 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/PL52J2285457.
Long Sleepy Train Ride (Sound for Sleep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa2fbc94d47d901cd758fba828968a6e7cc85b792c4ed202bc451f0c54cf709. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/PL52J2285458.
Train Sound Sleep (Loopable) (Sound for Sleep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a02ba29a3eb88d646460a50c5727ca75e5cfd80143399b494fc37f31c7277. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PL52J2285459.
Train Sounds for Sleeping (Sound for Sleep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f4269096cc2349274addd6de905dfbd7df955be7484880c8c9f355c6e1e194. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/PL52J2285460.
Strong Wind with Train Sounds (Sound for Sleep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa1362c6c1ef17a05ec3e79b7bdf74d46dbae352f4e8ac2e309707c1d37ee2a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PL52J2285593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d7b8e4c072d6a8a2cb6077f08fa2d87257d48741c491e6a0ed470fddee35bb. 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/PL52J2285594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29c0d971772a36124b72eff8e303cb1c9796bf335e39490d5003a1d9cf6c51d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PL52J2285595.
Train Noise, Cabin Sounds for Sleep and Relax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3658cef64e810401ed6eb4ae85e4fefff58c49721718254b91aa44a4a31f4491. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PL52J2284988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fe0724a218a03d4f8bf924938553d3966d772419471037998fdc0f6fff7416. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PL52J2284994.