Valma is a fisherman village in Viljandi Parish, Viljandi County in Estonia. (retrieved 15 March 2020) Valma is one of the oldest settlements in Estonia. The first settlers occupied areas around Lake
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 0xb147d4e71ec7da82a79b4c19c33cb8442202a4f49fa44bb23fefe8a99407bd86. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72e8cc40-9ac6-4f15-9f62-5cd51ec27421.json and https://artists.proofprofile.net/proofs/artist/72e8cc40-9ac6-4f15-9f62-5cd51ec27421.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 0xa97ea75773d31d6560694d6f027f52eddc96ae03ca2572979ce9e7b22749ed60. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FIRRI2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641f9af162e1091a0c30382f555c81a8a812c80518d979d89f4838fd11b6835. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:21Z), 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/FIRRI2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3a9c8a2d88ae45c88711d912af8c7123356342599cc80223900137710aac61. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FIOVR2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c37795a14595bbd595a46d223cdec8c0210b3dc9a4aba49fa4a243590d3aa. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:26:34Z), 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/FIOVR2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f764768d7ede3218b8a53f43e45d977c11142d2145aefcd2716ae7284e02d0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIPEB2300119.