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 0x8be6c7ce5fa6cdc38dc592239c1548b349f11ffb10366a83e724e388f413d07c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d3a48af-c2ee-4504-983c-4ac85f8259e3.json and https://artists.proofprofile.net/proofs/artist/5d3a48af-c2ee-4504-983c-4ac85f8259e3.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 0xe521e9451578d54b89cd69222e0204baaca2dfe1ae97a7204fc8a818f483f2cd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HUA251750701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a94937cf37fed3aab27b651a40a54922dc757b6165b8c88cafbba9a846fbb2b. 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/HUA251750705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bb362953eb0d84536d38dabc04181901559ade660e581baefe7a897f427b5f. 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/HUA251750706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6bc976c812b083cb894ef60a89ca4c2f890fac249515f1f30d9294f20be95. 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/HUA251750707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63f3565daa6c14a3ec1a7b942cdcc0d1cfeb4c3a50b6c6f86701b1ca1d9648c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HUA251750708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef243550cfe7cf4e5676e9e3934b78d0d0f36857c2cd03922d36f310174e42. 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/HUA251750711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32425395f0629bbf39bc2ce0d990469ce1f679fe01e21918ad1952bf6588e46d. 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/HUA251750716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfa284b8247dea5f780d1a9a4e381008398b804822de15b1539721b6bbc56b1. 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/HUA257107003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a50be02036e12d10bb747f52d296fa40da774596b79b54c18b60c7f851d298. 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/HUA257107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d56d6b1ef76bb8af101d2001a1c2022f7087b1f3a179b7a2b9c39f39351c8c. 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/HUA257107005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a00ce01fd720e2b2c734e7f246048e5f0ac46c5655ad06253203dcfae5f3d3. 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/HUA257107007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ce14e6d11a9b2aeb47dec18530ec2f0e25c9600595535ec46f2f4332a48629. 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/HUA257107008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abf06806f01a973c92cb094996c68ef8f2fbbc4d198ae40b0f37133ad7a66e9. 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/HUA257107014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1184f160368309857c5e6201c2e29dee1f70fcd598d0d2b79c3ecb92f6ada04. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HUA257107016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6dd5b2c481550d8db30d1e4c69e00a46ba124e15c732982bf1c7302fa911b0. 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/HUA257107017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2556aed1853bdd63d4adb5aa5cc9fc2a5eb5a69e6a3c2eaeaec59559b1b996ab. 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/HUA257107019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005ae2090d72337d5528939247ed5d6b54a45d8c060efd53ffc5d79d87e662a. 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/HUA257107022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d3eb7bbd3c8238af89c7d1b0dc5295a9c62ab0cfddfd3abefc1bae15b65a1. 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/HUA257102101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e5657c370f2ddaf68585c03866de2c2900f72243b8a06de34483ce7d20a039. 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/HUA257102102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4089f7c254906b67e85c154934bbd25a7cd30c6bee4a5a5165935f2300d72b9. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HUA257102103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4044f4eecb9f2c41fb7966c104fea1e38266a93b4769065b9f82694b5a125a66. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HUA257102104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa410b49369fecfb7011e45c9f815ded641af8c132661890493dd1f2ee104b703. 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/HUA257102105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3936156cb522d5bd3dc9ad354a160bd910407c24432414a7f086b5e11c9314. 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/HUA257102106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1015794cfe5a002dce498c61c6f1e3828607679c046d961d96ec2b8bab516c80. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HUA257102107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d2dfb67e2e2f7d7ed657571a3cfddf91f582c800ab115162e14cf50517927d. 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/HUA257102108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e1cf7320ff2ecec11672e1c17c9a309c1c2f4ecf40a19bab63321d117bdeed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA257102109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cbda609959c922f1779b5a119882212c6dec6d3515e5f2bd92b2ea124e8439. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA257102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d122471b562c29fccf1aae02dab9f3be5855c4b34b4d101d0f897c0812fbe7. 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/HUA257102111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7107a6b34fc84f2eee2e0fde213c95599ec35702f71b13fdd3d0ac3e96f1ed37. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HUA257102114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fa921d69fcc93d985f0bf1b18c96c38cad5a8ddcdc2731f6024b87fcc48c0a. 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/HUA257102116.
The Hungarian Song / Anthology / Recordings 1955- 1958
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774d812db78e4a936a6be7889cffa28e8d4c41387f982b8161abadda3ec677c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GRHR10966809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003186bcd6d3a796454c5ff7c82c6f1017a115f54325ecad248990bdc073e7a7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GRHR10966817.
Lagzi Lajcsi 15. - Búcsúzni csak nagyon szépen szabad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2442f3319e4cd2b096aadc03f1a36c596836869d37973d7c0c64157837832d98. 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/HUB281205939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee938f829a159692d0cb255e416f3ce332aa8e67b6a50046013a86945831e9a4. 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/HUA253740201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf97c912217049d26a8c6f6d901e47bdeadde367530f4059467ec097a1260e6. 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/HUA253740202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1554cf3b02f2e0ab75be472a31dc82a20cf6ea0aadc71ff4f311bbc8dc5064af. 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/HUA253740205.
Hungarian Radio And Television Symphony Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de68449cf92ea7005b0b3f296664b55c5bfed20b84010438cb7e006940d38b6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HUA253740209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4b2c8fbb8fca6cdf422cde07e1652ed162ccd938ca4f89bf38093cf50c1f6a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/HUA253740210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bce04f00015b10b2755cff12aa7392abbfec321abaef7a29229178c9028e6b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HUA253740211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc856d467a6ad74ca68a935bc31bf95ca8b67554d2f3bba792bbfd1604921f9. 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/HUA253740215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46c539e404ecf29d3ffd07d6a99903e2acc254c040eabcaa0f15e19c90461fc. 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/HUA253740216.