Blæst are a Danish pop band, consisting of Sarah Sofie Malmros (lead vocals, since 2025), Lauge Kjærulf (drums), Valentin Buchwald (bass and synthesizers) and Anders Bondo (guitar). The band describe
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 0x42336ecd2068a2eb867a13388880bf5fa3697733daa00e86bdb44e220b07db0f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/912bd332-87a2-475a-9bd1-158c48a66578.json and https://artists.proofprofile.net/proofs/artist/912bd332-87a2-475a-9bd1-158c48a66578.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 0x8339e3be1bf9164363071cff8e4ea148dd72e0471d852297663c0f6abc449abd. 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/DKUM72200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d444d240e580e9c2f8817c4b23501c2ec5bc0d1cfad0510fff419c49073f9e3. 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/DKUM72100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d18a8947f627937633903b27c9e3c1590962b994a165c2f3bed3060c600d3. 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/DKUM72200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e16e29a08b54e564dd679c4f97b9029e2ec7fbce977aa19cb2733bde02fc6b. 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/DKUM72200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859ba1b32100ffaad06c4183db0927e4f4323f2eb0a88c01078461fd78844843. 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/DKUM72200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a4345e3cb840e49b1569d13db236b7429015a532d656fe27e3fc0424964cbf. 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/DKUM72100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eff71e0600fc0abee03b3ef2cf77d638bf862a8380b5c33aa5b71134fdfcfb. 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/DKUM72200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df32eaeabb1506ac2aacd1ba5284fb1a6c378745e6e8e0ddc179c451a33252d. 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/DKUM72200195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e912a0cdfa197a5f4351548648e40ac22c1463741313c9a3e4f8407773dadd3. 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/DKUM72300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d5284be57ab4a4ab7cefae931252f50d9faa3c5c51d3edf6623d4a9e099128. 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/DKUM72400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e521996c5578d2831075efb6d11a7d57aeb8ea7ca76b118e9ced78efd7eb83. 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/DKUM72300739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a23c29bbe74f1e79f777947644889b7921a63f30616ffb7693d91b54b1ba1c7. 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/DKUM72300617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdded27c0ced929ecad3c63f9dd390dcdc406b87691fd6a8a753a65e50ee20f. 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/DKR642000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1270f0dafe0305d644b229de83ab70ef6d8904b89ab55b0dc376afe30b98a15. 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/DKR642000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c7df93441826866ebef0bcf7842a3142f8a0bdf652b1d00793c88b4b0dc3f6. 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/DKR642000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224c7b44cb6a4d11ae242fb0354b3a7da29d6eba791cc29295b7f69a009cdbf4. 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/DKR641901802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15083a926a7a859cfe964bc96f53e9e2b869f495479d4468f6e9b8a783b3f8bc. 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/DKR641901801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651723d72b974ec748a71d0fa83078d15833ff52b50ba1dc0edc0fdfb594fb33. 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/DKR642000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1270f0dafe0305d644b229de83ab70ef6d8904b89ab55b0dc376afe30b98a15. 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/DKR642000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c7df93441826866ebef0bcf7842a3142f8a0bdf652b1d00793c88b4b0dc3f6. 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/DKR642000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224c7b44cb6a4d11ae242fb0354b3a7da29d6eba791cc29295b7f69a009cdbf4. 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/DKR641901802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15083a926a7a859cfe964bc96f53e9e2b869f495479d4468f6e9b8a783b3f8bc. 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/DKR641901801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e912a0cdfa197a5f4351548648e40ac22c1463741313c9a3e4f8407773dadd3. 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/DKUM72300070.
SOMMER 2022 - Sommerhits til fest og hygge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d18a8947f627937633903b27c9e3c1590962b994a165c2f3bed3060c600d3. 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/DKUM72200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de653fc62719d84508a26e4b34c6410ea4d1da09271d295898651d87de3d314. 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/US38Y2410326.