Guðrún Ýr Eyfjörð Jóhannesdóttir (born 8 January 1996), known by the stage name GDRN, is an Icelandic singer and actress. Much of her music is jazz-influenced pop. She won four awards at the 2018 Icel
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 0x404389c12c90c32167b7ce584ef80a1775775baa2cc2e2cd739c435156fc08b2. 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/5ee20aec-dc55-4533-b716-9fec48ae5ee3.json and https://artists.proofprofile.net/proofs/artist/5ee20aec-dc55-4533-b716-9fec48ae5ee3.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 0x1d9a5bc2b70c347ee74bc59673329320929cb6b89409a550572893107d3eb8cf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ISV441731901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2948b9ea40984750d7fa7f755b1d620461a7c1cddf1ec39f6bef875df76300f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ISB111802804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc783d2a8f799ef608d8288847ab528d8410ad437cf6f2f2fb6435efc93eceb52. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ISB111802807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7eeb2f30630170aa059237d1971b8137d339d025a89b988570662ea3c1fd46. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ISB111802808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa224bf1a5519e5894343c714bea0851ff74aded19930cc01340ae9c428f42421. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ISB111802809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbf0a0f5583db8030af01cf2c10732a108559e2713473436d4a1f3400dde5e9. 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/ISV441712701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b55d0cdc2dac7f97fbf9ae4d92a95c8239cd7994e39a07b4eaa6cd3a06a14d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DKADG2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9558dcef2596533b257c708f9de3cf2998cff47124a41f57ef3add0e35b7dee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DKADG2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe93c7f2f87b3dc4659f85a967ef7ea7c02fbfe6eb4131dbe4fc85b604f306c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DKADG2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d19c7179fae952c2ad5777621f897d315c4622de9b69f2321730d3b435f19. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DKADG2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124f0ea4005a50ab8fc0647690e107e3a79fdf7a0ee789feeec38fe56c7f5c33. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DKADG2000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bf3e6b625e52ab562513120e64259d9ae63257af67697a6b61c9caefead5ed. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ISV982189101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742316dfada674a33ec2f32a4ae91dcabfac40c4f863d02f4810bac80860f30d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DKADG2200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b476737bba49c7ba31f1e7620c401f36b1caa01cd489637657571a524f4e627. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DKADG2200456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21908a0ea7c010c1c3f9a1c5d07098c7da3b047302066858014605a16b436b2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ISV982327201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e3df1f30bd1c70d9cb78c8bccad4402745622c4c9734829cb5bb4ab59b5e3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ISV982358101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4b08087e3dd28ca26f324d25ccc4a540739c0eacac5b83c39bc5c9ac528982. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/ISV982391602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c9dc0c23cd2d2c5060c9e5e5f8a00fdc510d1db7aefe14cf9760baadb670c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ISV442406601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee697b0ff7cada4db3d87961c2ea186753491ae7d611817a26c91f5bfd2cf17. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ISV442427003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837b0c7d1b0d0bab6558ee45739ec81b1beb1af42ba04d2f4af1b4a70f1d212. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ISV442427004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5707e27e26e0f16eb87133aa3fa624b47ef7d9df7640522a81a98e451905747d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ISV442427006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e3df1f30bd1c70d9cb78c8bccad4402745622c4c9734829cb5bb4ab59b5e3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ISV982358101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d0547459d3ce972659202dc9e0d964b7d4a7326d4dc3174595c033b5166f6. 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/ISV982448001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6d88070f68d1cf2872c2f9b576a4eb601c14c25141b9e141f47e381e41bdb9. 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/ISV982448002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0d3c2d4dc5f884c60cec1bf5be876812ece42b3c2228ea9475c686561331f5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ISV982448003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac4039fcc693db7427ae0da1811acea07885315c0708ab26e3b5ffcdcb6f9d4. 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/ISV982448004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb820ca3fab655aa5d612c3d707f4c9806ca64d1a22d3f43c49b4b33caa95300. 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/ISV982448005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868b888c565f029aeaff3809598f78cad42081a3f350b4cba39b37ad17889c25. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ISV982448006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2bea09291d4db66d65cbe76cce8d7f22719f395fb82fdf9f554d0e812908c1. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/ISV982448007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baba707a43bc183875c01cb69bee70be9c35783aa6715c5854255fc0b86f6a2. 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/ISV982448008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04df3ae5894871eca6da9a52f145c6c79dd7b76a6df458c8d736c213237708d0. 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/ISV982448009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b544238023656a9ae33fd85ed0bd187d25328da9c1c1acbafc282daf0405e8a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ISV982448010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a72609e3fe4213ffff2b45cbe94b3a3d2a4237e8314dd9de067199826a895ae. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ISV982448011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aa4ff476cbddc97ab4f50f67e458eea4c1e3945598ddc5495c7bbbcd27e6ed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ISV982550702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4e5d03cd3ca2a8cf23b6fc89c2dbb6f0c3910870557e989a0c5f0f8fe0a4aa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ISV982550704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fa28554abf4dc5e8bdcdba3b58e6c0e2a2ef521a2ad750a688158e06fd86ad. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ISV982102610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b78d92a527ecea22a75cdb904d086319cf89267bc8ea28a034e9f3c41fab74. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USSM12102574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914e3f086174c436451d0bafdb2ddd9a279226f4680203c473a240ea7e8aad20. 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/GBBTF2200148.