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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bb362953eb0d84536d38dabc04181901559ade660e581baefe7a897f427b5f. 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/HUA251750706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6bc976c812b083cb894ef60a89ca4c2f890fac249515f1f30d9294f20be95. 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/HUA251750707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef243550cfe7cf4e5676e9e3934b78d0d0f36857c2cd03922d36f310174e42. 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/HUA251750711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32425395f0629bbf39bc2ce0d990469ce1f679fe01e21918ad1952bf6588e46d. 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/HUA251750716.
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.
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 0x1bfa284b8247dea5f780d1a9a4e381008398b804822de15b1539721b6bbc56b1. 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/HUA257107003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a50be02036e12d10bb747f52d296fa40da774596b79b54c18b60c7f851d298. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HUA257107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a00ce01fd720e2b2c734e7f246048e5f0ac46c5655ad06253203dcfae5f3d3. 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/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 957124 (2026-07-08T03:53:27Z), 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 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 0x583d3eb7bbd3c8238af89c7d1b0dc5295a9c62ab0cfddfd3abefc1bae15b65a1. 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/HUA257102101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e5657c370f2ddaf68585c03866de2c2900f72243b8a06de34483ce7d20a039. 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/HUA257102102.
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 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/HUA257102106.
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 0x69d122471b562c29fccf1aae02dab9f3be5855c4b34b4d101d0f897c0812fbe7. 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/HUA257102111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fa921d69fcc93d985f0bf1b18c96c38cad5a8ddcdc2731f6024b87fcc48c0a. 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/HUA257102116.
The Hungarian Song / Anthology / Recordings 1955- 1958
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 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/HUA253740201.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46c539e404ecf29d3ffd07d6a99903e2acc254c040eabcaa0f15e19c90461fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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.
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.