Appel may refer to: Places Appel, Germany, a municipality in Lower Saxony, Germany Appel, Netherlands, a hamlet in the Dutch province of Gelderland Other uses Appel (surname), including list of
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 0xbedbad40773adb9daa5605dbbb6fdf924eebd4db32347e53e222964dda47682c. 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/011348d5-9bc5-41bb-a2e3-73aa198b574b.json and https://artists.proofprofile.net/proofs/artist/011348d5-9bc5-41bb-a2e3-73aa198b574b.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 0x7c35c6c283297dd637d9af4a2afe811e447d500c3b6ce59521f2006a0c87d189. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ZACN41701685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e236e3ac49c683e5d7e17d2d10c94e9f9504a01f3b0e8ff755937f237592d3. 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/ZACN41701689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d40f0197d68bafde704197b08ba280f07025c01aef51147a04d60cd990d79d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ZACN41701690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb99906f494e383a0ddc4a21e2ce89c4be7db61c1b97a49c07d06ddf3bfa4d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZACN41701693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b3313fae71d7a500c61e16f19f4a29097c13acaa42a7db517cbedbf4a72dcc. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ZACN41701694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c02203b6982243187dec0cd7ec05a9ed4aa084d9617071dc481256efa4b2c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ZACN41701695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f286d1c21f6819160c0609f4bb9e331619ea60f91e756dbab16098d6b2aa6c1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ZACN41701697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1523a255df1def1e1f101628314e95cf8998808fcccc5b60127e1aa53c682a07. 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/ZADN41700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655361f2bbc0539fe146bf04ac0deb76217899d96643fe9a0c1f871049328319. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZACN41701688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5bfa10cf15781e76ed33bd8856508702eebf9a8fdbdc923666ceed483c5834. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZACN41701687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d16a313dfaf578a8f590bfcaa857b628cfc8376899c0cd363fa33af8eb47889. 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/ZACN41701684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a69620313522aa83791daa902e11afe36db36d7c711d4a026ae25fddf78922. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZACN41701696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0610295ab0e167301d0a5243c8ea912138bfb48f200077f49e87e3a326848f48. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZACN41701682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67707a6572bd0c419ba489ebd41a7b131ef41e820f8c5a4b7cc33b1783a6f457. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZACN41701691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c02203b6982243187dec0cd7ec05a9ed4aa084d9617071dc481256efa4b2c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ZACN41701695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c35c6c283297dd637d9af4a2afe811e447d500c3b6ce59521f2006a0c87d189. 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/ZACN41701685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f10861377af48f9e7ed18ff337761c508ef7d39e1d1644d623197e71a5e4639. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZACN41701686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da9e0d680eee0035c40d90d79b433552fd92617b6f4d6dff9a7a10d0f69ac81. 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/ZADN41900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f440cdfd06594fcbdbe5a8ded781ed9fa2238e6ecff452c7e2c4bcd679884c5. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/ZACN42001566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e9ec62539d6696ffd055d7acf243a3ee2df72b06ef28b5aafd843850a345e7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ZAO862100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93791f0b750d3550617e3b0e00751b47ddac35adbab645dc6386b9eda6e9cc54. 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/ZA34L2300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ade61071fb3cf8325686c83fc1dddd19e4e1ffb69ec41c52091e4acecfa1d03. 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/ZA34K2301245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabbaf963962af3268858c7bd71ddbe114bea4f44877ee1a0e9a8afba6722bfd. 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/ZA34K2301246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d448c1931befc2cd910717ee96a1402f0b2a910d529e2a07025618c39e590e. 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/ZA34K2301248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c1eb014220218ba88b26e9255a41914d94a8ba2d6bbaf988bde8cb8e5ac93d. 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/ZA34K2301250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d125f5c4105480507489488cd8b8482191ea8b7d72bf6dd07d8a55469f5111. 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/ZA34K2301249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b463ed019bc107277434687e5a886b5e580d68f03558ee3749c7899c93736fe. 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/ZA34K2301247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1b3a9985287e0d3d7531ca1c46dfcb2fa6759a4d4cbeec40cb44bd28f23e3. 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/ZA34K2301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db6c5438989baf70b09e47f8ec62a82a6711670d361c9a2858025fbaf178335. 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/ZA34K2301252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19b3b355871ef20a2a3b1eb37b3f6e9a5684b917e693d6975f1d8d17e40c84. 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/ZA34K2301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0763551ac51f615ef30f4ff2cb2143ffe8ba33aa41d360cad68fe54d3254d657. 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/QZTB52247572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591d6eb7cb0562bca5564635afeb4bd70f5f9ffc12abd26048f3821fa12a7fd2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZA34L2300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149f30fda462c921490a61e724d4aff21201957d4593bb44de0c4865042064c8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ZA34L2401072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64e583a2d86f93af4ab80578ac28ab6ba546a61c6742af1f3dbcd978ac0a6ec. 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/ZA34L2501237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da645dcde6146f056111b2538b9f00c7c9c3baab1b156d1b2169f00071aebc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZACN41701683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb59bd4d34d695676da441c6ed3f721365345e2910f97c18103355df46500385. 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/ZACN41901402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8619c86b810edc7a038603c164736c91ef6331e34b5664d14eab95efec1d8d. 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/ZACN41901340.