Stjórnin is an Icelandic music duo composed of singers (born 11 July 1959) and Sigríður Beinteinsdóttir (born 24 July 1962). Together, they represented Iceland at the Eurovision Song Contest 1990 hel
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfa4da52df5d2e953062e8dee65ad9e1c5c2c20b31ff8d0424ab9d8fb1e657b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/015f79f2-3caf-401c-895c-4d56b78d4905.json and https://artists.proofprofile.net/proofs/artist/015f79f2-3caf-401c-895c-4d56b78d4905.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb652ed358996a2296353cf52f479823b39f8c6ef54d7b96dd4be1fd65110bf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ISA109000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e7785491ee9d274908a5a256e457289739f6ea365cdc42549225c08a182dea. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ISA109000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67d561f0663089f2970cff980d01112abf349cf88c7aa12e7c83d6108ee5823. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ISA220800415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd84daf77aca9ced3f38ea8c25347227e96c71bb4b45996354e8a0d7c96e0d57. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ISA220800421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d84dbefcf5df5a0abb7239f4b4bbb60d6bc3138f3f5c4614fc0d5bd4ed7d7a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ISA109205404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d62adccce96566146ca2056f9100f3fe81d8b1f468bbc2f6ba36ab34083cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ISA109205405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db7c1b7428d247eeeaa7241cbe3fdb9a5132dff0bdc67bc1cd471314e332852. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ISA220900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bca2bc24321402748182e949b515466c8b0dce1c85035cf796d47f6846e382. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ISV441937601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a542c5251d042cd8c4c0b4332ac26dfd9cf1f44d9db9e21180fd9a72654b12b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ISB112202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85808842945c88f1501e03a1ee8ba9f26f9c2bb599908e79e3cd332afd5ac26. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ISV982406301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fa03dcbc46d5af25eea0c4306dd547eee5dba86c22288ae07298a0d96eef53. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ISA111102210.