1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xa8f3eff908669186529e61fb777d21319d67ea289ac8444ff5ce77353efe6282. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a402d3c9-1b01-4b32-a9a0-ca0b408038d6.json and https://artists.proofprofile.net/proofs/artist/a402d3c9-1b01-4b32-a9a0-ca0b408038d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Polka after pelle fors-vin, kvinnor och polka - Live
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 → block OTSBitcoinBlock must exist at that height 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 0x38416be696f6697fa1979b563e59848a5b5ec52e9ef7b9cfe276042417c10e17. 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/SEVJH1504301.
Ljunggrens låga, polska efter Nils Bernhard Ljunggren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26ff83dba1fd5eceda90a38af5c9378bb4f5d40d7897e9261e53f266953816. 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/SEVJH1504304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27314b43e9c602b6d01c20d0c373ce9a763c2451288af7d177ccc37ad6b9317a. 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/SEVJH1504309.
Magdalenapolskan efter Carl Gustav Åstrand
Fyrareprisar'n, schottis efter Johan Magnus Dahl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf3aa417b8df32bebde3f283a037ed2ecb2f022a774b83d3c1528c4a4395cd7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEVJH1504317.
Ölandsmarschen efter Anders Johan Eriksson
Brännvinspolska efter Spel-Bengten och Luringen
Flickornas mikaelidans, polska efter Ida i Rye
Stenbockens marsch efter Pelle Ror / Polska efter Sven Donat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe019752ff475d52a6c0f43e495f20d3abaccf3a7780a0b6d3fd57c7fe07ad965. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEVJH1504322.
Polkett efter bröderna Hellström - Pt. 1
Lille David, polkett efter Anders Fredrik Andersson
Polkett efter bröderna Hellström - Pt. 2
Prins Gustavs vals efter Anders Fredrik Andersson