thumb|Angelit at Faces X, July 2007 Angelit, formerly known as Angelin tytöt (Aŋŋel nieiddat), is a Finnish Sámi folk music group. Most of their albums were made by the sisters Ursula and Tuuni Länsma
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 0x7b911e4d58b1d4abda34f0c789fa7c88c0a8686d47c1663425410dde58c1ea4b. 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/6008bfed-1379-40ab-ade8-4a89ddbb5082.json and https://artists.proofprofile.net/proofs/artist/6008bfed-1379-40ab-ade8-4a89ddbb5082.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 0x3cdf715ed14919408ea692e2a793bf9ce5954eb50d8a1e00033ecac8e3a2a44d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FIWMA0300072.
Channel Nordica (20th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c22ca1ccb2a0d1a8f7da7d26327840a591bda297e3dae419f8312e8d9f321. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIZEN2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866db75de20ff74522ca5824287ee2233ac50688bb0ba3084a6828f3df319123. 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/FIEFP0000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa68653626ea67f7507acfeee6ce4ceaa2d3398e866125f29e1ab91cb5b0714. 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/FIEFP0000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe042d21eeb9ec4d0f7b16476021c25966d1cbf705b263f41b4aa24ea4e140aaf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIEFP0000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e495721c335e4e5dbad7ed888bc528725f7866a592063e5690f1a4358b7659. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIEFP0000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cada614c46f12c990aa3107378eb1d4698001991dafd7fedc65bce18deccc4. 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/FIEFP0000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0142c9db752bca0e49502743431a4d97c1c11a503fa23dea488e7755d912a8a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIZEN2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c22ca1ccb2a0d1a8f7da7d26327840a591bda297e3dae419f8312e8d9f321. 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/FIZEN2000023.