Oslo Fagottkor is a Norwegian gay choir / show ensemble established in 2004 consisting of 35-40 gay men. The choir is known for its varied repertoire and at times humorous approach to interpreting old
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 0x0974716acc21c08bfbc83ca4d5461251ccb946af6a7a3d3156081038a1de75be. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82be9fe9-91d6-47a9-8a36-c54ebd9d8421.json and https://artists.proofprofile.net/proofs/artist/82be9fe9-91d6-47a9-8a36-c54ebd9d8421.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 0xb6e7a3082daf61ca8bd0ca5d794ceb3124aaa9c0be4aefb06349a0eea9b65086. 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/NOFKF1205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f7eca3b77c5781cda37a759d03510b0cac7b709f94ad51e61cd9fb0693899e. 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/NOFKF1205020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8551cb24874d363870517924ce15088662a5a051f1e26ae9748056464b479d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOFKF1205100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6571ec51313a14ab75c9a5d238aa33a38f9d677c85828433d4bde74f08e113bd. 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/NOFKF1205110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd40d6aba6ab5b4e75da1c32628b72e1936edae18b70380336e6cf5c269e5a25. 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/QMDA72412922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c4868c991503a2e4e165650631f9516f3fbd0c0fa8d1c2322d571482e928fe. 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/QMDA72412923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da002b95a73dcb52545164cd1d483dba996790421437c75e9081bc478a0ce9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72412924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4cb11830d66eadf344fb898cf09d43d2fd32c4de8e707a63b01df83adaa068. 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/QMDA72412925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60638f612ffafd6adf4d5ff5c9a851ca0dc4afb258f8db3b3e2dbf7475d48b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QMDA72412926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0fe8354fe1c2af07c602f10cf5f812add2e98b89cf7388a5892b4e75967a1. 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/QMDA72412927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308c5000bf816efbc0dcf00ee836030a62de953f2e6e0c8c8f431683ba8f0e45. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMDA72412928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a48e3e996a50361ff3b0192544c3ade9c25df533686dd499389eb641176613e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMDA72412929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ea5bdeb522c9a9f70ef7eb2709b834f64d4e9318505c6c43e68469a48444fb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMDA72412930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0223973fde1196a237162101e874e9ba43d34224e35df62693b8309f484e6. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QMDA72412931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae54fcac112f49defb2c0d5d382a0c17bb3b7a60c139e937f46adb1965159d8. 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/QMDA72412932.
Norge i rødt, hvitt og blått (Live fra Sentrum Scene)
Norge i rødt, hvitt og blått - Live fra Sentrum Scene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ec28514aa54218c15dcdc38853807216f618575e725c3834710caaf2bd8e89. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NOFMK2003010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a15696313a4910cdd0591a731226c48279e6a3e62c6b9fcf90dc6bb06c05f. 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/NOS222201010.