thumb|Kottakkal Madhu Kottakkal Madhu (born 26 October 1968) is a prominent Kathakali Musician, Playback singer and Composer from Kottakkal, Kerala, India who specializes in Kathakali music. He works
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 0xde2338b979f272806ec4676d6583f64e6ab939030dcbfb97e9553c664f6a621e. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26939a47-52ca-4543-a709-fab88a1b1dc8.json and https://artists.proofprofile.net/proofs/artist/26939a47-52ca-4543-a709-fab88a1b1dc8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kathakali Padangal Nalacharitham, Vol. 1
Kadhakali Padangal, Vol. 1 (Carnatic Classical Vocal)
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 0x38253606ab235cce13ea1dc62ee8861c247a9e709f43bcb093d2a4a3c7b7da83. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:53Z), 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/INM201880310.
Kadhakali Padangal, Vol. 2 (Carnatic Classical Vocal)
Ajithaa Hare (From "Kadhakali Padhangal, Vol. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38253606ab235cce13ea1dc62ee8861c247a9e709f43bcb093d2a4a3c7b7da83. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/INM201880310.
Vasa Vasa (From "Kadhakali Padhangal, Vol. 2")
Mathamganam from "Kadhakali Padhangal, Vol. 1"
Mangala Moorthi from "Kadhakali Padhangal, Vol. 1"
Saravedhiyaya Ninte (From "Madhurapadangal")
Padma Vallabha (From "Kadhakali Padhangal, Vol. 2")
Kalamandalam Hyderali (Original Motion Picture Soundtrack)
Ariyathariyathe (From "Ayyappanum Koshiyum")
Manmadha Nashanamama (Kathakalipadangal)
Jayikka Jayikka Krishna (Kathakalipadangal)