Antje Duvekot ( ; born 1974) is a German-American singer-songwriter and guitarist based in Somerville, Massachusetts. She holds three top songwriting awards including the Kerrville New Folk Competitio
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 0x5ba16f8b83f5dc7411c67306edf1ad592358469174000180d182dc13d6a61a67. 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/d3a59683-5536-4304-ad12-c2826914e758.json and https://artists.proofprofile.net/proofs/artist/d3a59683-5536-4304-ad12-c2826914e758.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 0xf1445e6af79cb6e6c73d9c376f27b73671cae31997818a6caedb37b6bb692c18. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:51:43Z), 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/US88B1001221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5942d33e3d4970b02e369a8393f2b5d0ad655b8dadf51353e9557061a1129d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:54Z), 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/US88B1001222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39357bec5d699fb14dec05112f9e09d8dc27fc9f1598dca422c9f859f1f82bb. 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/US88B1001224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dd3c2f5e439c8f21bd4d03baa13687f08dcd540437946456a3d093edf84404. 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/US88B1001227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3c1c828039374ffa7e155ace87ab74862dc4fa22fbb3675e5970d9515946ba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:32:56Z), 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/ZA4QM1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2c178c6758354a13aea106323cd1cc4c1ade70866a33644f922aa84f99329a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ZA4QM1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7677c88fe01ea2533d523850fe554fcb6571a34080c6c6f88f305fdc2233e0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ZA4QM1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492f3c3f07916570f34a514df5402588197333ad723434f29dc02419abdbb2d4. 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/ZA4QM1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371d788002f31a6961ef326d13874b049d9188ec282cc6652950d993550c823c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA4QM1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dfa7ccc7c60588e42bf34559bc8e796b2dd79ecbde798afe6aebca226e2273. 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/USHM21968643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507507e098501d19029b470b8ee533f1fda42181fcd65f3430028f42c8d22384. 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/USGCV0959880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c97d570332f31b2f3b8caeb3f18e2ad5e981c983c2bd73b5d36bdee8fc9d0d. 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/USGCV0959881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80924b6aa4b671236a2c56b5bf66a86d74314df948d04c2549fdb3f550beb09d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USGCV0959882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda7cd78246273485faec7ac0879bb2c2bc7bf92403eb871f3dab3db0ceffb26. 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/USGCV0959883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d941c0d7651df0f98914fc744aa2615d2d02e5dd5ad5eea03ef79ce806ceec. 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/USGCV0959884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28e39c81ee37d605f85765ec40943faaa8a54ff9939053b11bd1fd34dbb62f. 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/USGCV0959886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5c57da15a2f98e204e2f24746b744fda170056b02cc9340c8583f650318b68. 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/USGCV0959887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c7c6b0717acd5ebf5ceab620a19d5002599add60cfc95f83df86e7b9a3e0e2. 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/USGCV0959888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e2cbda701ce144ebd9c28584a66662ac12e8b67a4b050cbbc90d3461a8bfb8. 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/USGCV0959889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ba414159f287765cb1376d939d47950d3a6be93e4e4e9a546faa88825eb7ad. 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/USGCV0838697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bc105fcc636ffe50a2787b5ca0ae7ec3fbb7fe24b7e061390e249be7f45329. 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/USGCV0838709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ba4b386b88a9a216973ff832a73842f7ca5f7d5adfbea63152da3acc987299. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:51:23Z), 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/USX9P0734809.