Citybois is a Danish pop music duo from Gentofte, Denmark. The band was formed by Anthon Edwards Knudtzon & Thor Blanchez Farlov to compete in the eight season of the Danish version of the X Factor. T
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 0xf5624bfebd0223adebab087b9525dac6aad573374037515b48e36f20a3a7f065. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b0caf9a-2320-411c-854b-e2e24e143840.json and https://artists.proofprofile.net/proofs/artist/8b0caf9a-2320-411c-854b-e2e24e143840.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 0x51db0d622565d33d112fb8654d0fe559e39acfaf5aa9aad036e83fb8266d9706. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e74f9f5c510b5fba9a2002e0085e0bf1fb4d1efca0146aa404ae6ec622a690. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44cc1c789795b61f0b77500a915a331cf9573191d6fd2abbbd73fee8317c7d1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM71900757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0e2a4b5fb229985408d0caa512fd706af53215fe4e891b7daeab0b26f6a03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72000175.
Når Du Møder Mig (feat. Michael Williams)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd068e8b0ded93785a8247b9a8e38c3d7ad7b0fe462b4de516d22550e67348c17. 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/DKUM72000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f39540582823217fda7bd4bc857c98063e0d03b4c5c8feef829c1003e6f6a6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM71900393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4010b6dd832e890e7c094bb17b655c3db68199bf74cd9d1171d025f54a67e553. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ee2bda1bc0afe190c0b92a5966d4cf739ad3b39b97a1487df5115b76da909. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231f0d3b72eff3444ee461b8016554fb63eae742113d3cf296deb517b5c70fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKUM71900262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b6f630960282d4d99b7958a8e898b7c34602df05fb2de76f94ad4921fb708a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKUM72000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a4118981f3a6a0687ef723ce65174477fb0d1c5b5e0e769f8c33bf6724e194. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM71900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b33363ea34eac89978c99ca92f86b1b98007948e06d1105220b58974e78f5cd. 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/DKUM72000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361dd411ed47a0f952a8cda2778db98394413a301411d98bd79d1cd1a1fd0faa. 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/DKUM72000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b101659b2ab0c9087b665711200b3c3c667aeb3690bb97af76c6e098769a2d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKUM72000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275684a839d0a01017e57db4040f29709d7e50ad175b2491d56f89900358c157. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKUM72000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e74f9f5c510b5fba9a2002e0085e0bf1fb4d1efca0146aa404ae6ec622a690. 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/DKUM72000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231f0d3b72eff3444ee461b8016554fb63eae742113d3cf296deb517b5c70fa. 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/DKUM71900262.
SOMMER 2022 - Sommerhits til fest og hygge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e74f9f5c510b5fba9a2002e0085e0bf1fb4d1efca0146aa404ae6ec622a690. 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/DKUM72000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a4118981f3a6a0687ef723ce65174477fb0d1c5b5e0e769f8c33bf6724e194. 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/DKUM71900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd068e8b0ded93785a8247b9a8e38c3d7ad7b0fe462b4de516d22550e67348c17. 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/DKUM72000208.