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 0xe029cb0607919fc113ce41e67e4191df57762d0b5d5c2cd6fc4ddf7e377eb0c4. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b29c0e8-589f-4b00-909c-0e22644e9e7a.json and https://artists.proofprofile.net/proofs/artist/7b29c0e8-589f-4b00-909c-0e22644e9e7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Study Music: Focussed with Nature Sounds
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 0xc5c2bb3a749e203d40eb7fc08c8f8d4ac0e89e6094b06443d50d8e5964455fdf. 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/DEUE12503207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f527f262606bf784458b914a10aa1b26de0c363f18b32607e32a8107bed5df6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUE12503208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbd78101b69984f86a016ca48cdf19fbdbbfbe5b61b57d54a9f2eb1a0cf8fb4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEUE12503209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bccbfd6cb5dc31485c4134cb6b48b8fb7b8ba28a20b205d56b022aa6b1e6423. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEUE12503210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc788fa9944d445b7e885fda518f6d9e28d1c48b710adbc71158331d2d5a82c0a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEUE12503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004928adacf422febe8eec0969024ba3ed747ab9add435ef265be7a12c1602c1. 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/DEUE12503212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12f7cdaa5e44fc11396055fcb35675ee54047180e9a6f54b14cc7aa92e890ae. 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/DEUE12503213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880b689fbea74f24d836f6936ebe554a730d6b66fa039edba4d4c3086f885201. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEUE12503214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1896ba6d2bf6a60b26343833c5aa1063a5ed0dbbdb11ddcf2f926d5e79ec6dc4. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEUE12503215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5b67bf89f7ad4fcade1f5c44bdb129f24bc4879b7feaee64a0fbc68ba77ab. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEUE12503216.
Concentration Harmony: Thunderous Study Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39037307128dddc1a5a0c2cfe9d7e64ec0206f61ce342d8f7b0fda7b1c17f80a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZP7F2285810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c08227490cd4c28808ca07a0ddbf864f16e5f4df171a92d097637ae843260. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZP7F2285858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79f5a329c5ac0bf0b4d90de4a3393b5fd94dcbf90e71042c26efe9b9123273. 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/QZP7F2238116.
Classical Piano Instrumentals For Studying