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 0x11a5f704f57bb32c351ddbd9671a9ad68378c5a07bad89ceb0fd69db97de6ac0. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43a30df5-d03f-434d-8f36-02679316ef44.json and https://artists.proofprofile.net/proofs/artist/43a30df5-d03f-434d-8f36-02679316ef44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Relaxing Classical Playlist: Classical Guitar Music for Baby Creativity
Relaxing Classical Playlist: Prelude to Calm
Music for the Moment: Upbeat Classical Music for Bad Day
Music for the Moment: From Monday to Sunday with Classical Guitar Music
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 0x618bd956068935c547960bfb546a7bd8b355d1eb076a9f2758c1cc7a3ab999be. 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/UKR4Q1961775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8ee88affba038386e31e636e3c1e6c40a2f6c74fcefc329b8714a9edb0894c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKR4Q1961766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c79b2951a255cd26038c802fe7a3d271bf3af861d40f09c1fa19ffd10471d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKR4Q1961777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca85735e78505ef15ba439d6fe6db536e95758c5db1a1a271c5698253c53c5e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/UKR4Q1961780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04d0b94e97544e952494e45e18688cd1b7e4ff479d50776bfe9d4fc678b1e99. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:10Z), 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/UKR4Q1961773.