In German folklore, a Nachzehrer (, literally "after-consumer" (a creature that consumes from the afterlife) in German; also spelt Nachtzehrer, literally "night-consumer") is a type of Wiedergänger (r
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 0xa014dca90e916ed20f7e4f267f3167db9bb2064dddb2f1e4972320803eb88a89. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2f13c38-2288-4444-baec-fe5e21c447f2.json and https://artists.proofprofile.net/proofs/artist/a2f13c38-2288-4444-baec-fe5e21c447f2.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 0xdf4de1a6d07df84adc005db2a63277a15f8b17f09fbf06c0a8bf47b9c7d3cbdf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZK6J2481571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace25030951e88ede5abd801acd0e2e8ff0e4f16c85ce71f9bb878ff52c50f94. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6J2481572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685aa3b3a10528353185e99dd16d9c9ed6e93c6827f8870173d37428386882ba. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZK6J2481573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e86b650e56ab02cd196c22591f195c7b58d13cc47802bd42f90deda727e3bb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6J2481574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecbcad70c5fc6810b8fdfd45d67a040dc05fabb3d8c41ff025c94b1cdb897f9. 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/QZTAY2352315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1671bbb0903f4c16e568a744318b6827f4aa4aa6faae8115403d2292316f5a58. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTAY2352316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194afcad4ba04b1b681f6846203d0ae076d2d007cf44d8e39ebc658c63070d85. 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/QZTAY2352317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04eb58213f5c2f9d515a80b5c1ede4623ef371a3c83f144bc32ba47694acac1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTAY2352318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8954fb9ea38219d00b982a4aa610a02e0173a480bb478962c96023fe08e71a60. 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/QZNWU2315998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9df37e14eeba2249964695fafd6c24f2228094a6a3425fa28630f93252a1dc8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWU2315999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d38865e103f286a6171e8afb8f570f6ff8df7561b40bd73b61af7134c1316d. 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/QZNWU2316000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c4113e38a94a36fd631bd2987f8baa52a41c502a5e96d13dd6e149d3317ee4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNWR2347450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92194c55e714069b362ce099449c25991669deed70582cec016e576654a1c49. 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/QZNWR2347451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ac7d135474311bacb1764ca378bb5365c5454021abb997a5960ee08dd1b9ed. 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/QZNWR2347452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ed251034c815d36f02a2cfa1a40aa06c700e53b689264b068d492a822e00d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWR2347453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7526a66ee0b72bb525f47e2ed65a592cfc38be403104ab6f0b8606a36aa3f3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNWR2347454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ee3cc013e14f8e5f3d034fda9c9749df7f2b9288e2aeee9ee5b312eb7203b2. 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/QZHN42391002.
Everlasting Downpour of Hateful Emotions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2585533488027650d4bee13b940844cc1196d393e579a398a44fc4961c360e2a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZHN42391003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8efe23deea532c3b3a41b42e42e7268df03794cf815a276a663a3e89cbf7e3f. 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/QZHN42391004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d03db5f78c39b7a6caf8eb2cf95356f28ce0d45a8dca2fad0dbfcd62dd943f0. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZHN42391005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a85b62526875d5d81153c7247c299cac30dc76f705dc3e38ae141d3d3503c8f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN32332280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8daa26635d086cbf2b65d4a5a6a92e1a9751fdceee2693d2bdcd88f75f53c71. 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/QZHN32332281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f789eed59f608c1a5623cf7eeb16db4b42f37720d53b6451b1b0b9648faa7. 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/QZHN32332282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89e18abcf815247429cdc53bba0285cb6f3b6e4c4b97db42a74f53e008ec8ea. 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/QZHN32332283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55595e475e9ea11744bfd83634fc5d47f85c7cc08259832bdff06c30d9fb8b8. 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/QZHN32332284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18464ff3eefa4c594d6aead562dc1631d978364f1ae6aa818050650bf789660. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZDA82337572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b864b71ab8d3ea456888f8e9e63a73bdb80a0abaa3f4c7525fa39586469aa8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82337573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6926698e27dd2e29aed5d631fa49da8842877c7200394e822172a656be0c1d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZDA82337574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07090e5c9125b1d53f6dc9ba967d888dedbc1bdd83ddbd2f616fc0d6ec9be9c5. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZDA82337575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b98c71d1d406cb8bd8776ab57fd20d581504bd60d23be502969e96076c3e55. 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/QZTBA2216003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4411dc41467d5e49baae46841e4949929366c236325bdc428ef2db50717298. 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/QZTBA2216004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74588f4482f8212f6d532fe6c222f621d5523c0f83e026142b7e3ea97c868d83. 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/QZTBA2216005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021ad8d78fef556ac0cef937ef8ad8218f7584d655463158a0d98b2b33c77a01. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZTAY2299853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44adbcad1baca9b5db9c01f4ab37850036f7da696aef2c385f85147fccbb542. 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/QZTAY2299854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819297a0bf0b561ce678e40da85c8181799679e306f5fcd2d4557796e5bf4575. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTAY2299855.