Judith Holfelder-Roy (née Holfelder-von der Tann; born 12 November 1976), known by her stage name Judith Holofernes (), is a German singer, guitarist, songwriter and author. She was the lead singer o
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 0xbdeb4a3290df39c637adc7dac670238f18cb08190596b5dfe7298dc046ceb189. 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/9a3d1dc0-036a-4adb-b392-1e91f75c9625.json and https://artists.proofprofile.net/proofs/artist/9a3d1dc0-036a-4adb-b392-1e91f75c9625.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 0xe3ed2449b69101655c92dbbf348211ad6d8effc4805a3299a4d60b913a12c33f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEQ321300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300652ef832e801af90c5fc831a37fb0f5d3fdd19a282c6f46ef8ba44e2ca9c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEQ321300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d5e69840ec40de9dcea7e069f9aecaa264e4bebb6d86929edbfb7376333662. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ321300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7504e29d08c690d90bb3c754f22618a57d99d15f308d2f25a7c4a0010801f27. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:41:39Z), 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/DEQ321300438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb579ecb94904992e7b91200acfbff3ca7c50b571eb851b6c544f3371604b2730. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:55Z), 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/DEQ321300439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ffa5145a935ad1c411cf3252f9df14d13700e5c388507b0abda7b3c80aab28. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEQ321300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe100a1f1491dc812cd8c8128942f7adddffec59379d11bed6de878964c1728d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:51Z), 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/DEQ321300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ec04509161fcaa449e93806958df4ab753517b92fd02f1a90599b94a87dd6a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ321400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2332415dadb2829eae0ed4adb0f5973db566eb2886b2edf4882241262974b910. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEQ321400281.
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 0x6fc226d2e9c8ce050924f9ae27a4bf04224a61eda4228e98f5fbfd799f504cb9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEQ321400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91b1c00f3d3a82139270565560b068aed3625913eb0e224ac7a1fd62532e9e1. 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/DETO31600282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e37d9e965a932c782f80b58d047e4da8c3fd67d6401256b8f07188c35851a70. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DETO31600283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07e9373227840103617a50aa1b6a7c6840de921b95c96dd5796ed26afedff2d. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/DETO31600285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86a942867ceee556f75a56090265de5cd2f8abca40387aa47b2709988b4884b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:43Z), 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/DETO31600286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2df0bec1732495a2554875c4d239ef55937cdac969d4cf12a559066968f5a44. 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/DETO31600289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005905e3225412f8632389338ca963eafa14bebf1ecfdd9dd1aa5ef4d5e126fd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DETO31600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775493139e2ed422c3781ad7225ab2809c5c513263e33a698a24dba45800ae31. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DETO31600291.
Ich lass für dich das Licht an (aus "Sing meinen Song, Vol. 5")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a573e21e0538a6c3909351fc11d05898a605634734399c984fa089e2d75bf3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DETO31800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2d33d27218f79f3783ad2b2612a2cf7b96c8d16c3bacd484c3850e0522f0c. 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/DETO31700499.