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 0xcce2075a0f00d09a923317ad826bda023cd58cb72a00844f3c9c7af08592e568. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f01d8d1-9709-4a4a-89f3-9385c9726876.json and https://artists.proofprofile.net/proofs/artist/3f01d8d1-9709-4a4a-89f3-9385c9726876.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 0xd77094f5eaf1033ab929fe200ec7712cfd0d1440ba6e4728f8d6188a39c75efd. 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/QZHN82431097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01716d06877c8f30581dd7f7ed43f15537abc7c9c3c67611041b8e6011f0c9d8. 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/QZHN82431098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf501e553753ca95b14c75f00ebe30b36ea74ad0b853871067e863b44fb9dc28. 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/QZHN82431099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbd8a725adf5a566127d306ff6d3f63b0a6721d9b716b90fa88c569d7595854. 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/QZHN82431100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5f78b383ecf8e417ee12f8e2a29be5ee51ee7124e099d3640f352ce1a6ac2. 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/QZHN82431101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7ffc7add5f217a1f422bd20bc89c298e944b737dfd091a587ab3d7eb3be665. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN82431102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be5c6c25a5383b0ae010456abdb0b12612cb4a435a5ba8eb72d156d5fcdba9. 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/QZHN82431103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeb592305479a284b9b2adaab2dadb9f2c638de66e9ab5f1c9f868480a12b96. 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/QZHN82431104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f5103147a72039140a2938f4791180cb3bef49a8e9179fed11a8f0a9c449b. 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/QZHN82431105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e2a213746742a680be7e5a088d2bd60a6a93ac67a77063554e39e04a259c5f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN82431106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8d3f3e843784b64efb89cc49fc9af22678a770bd58c1050a154df5e1231e71. 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/QZHN82431107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55df3501ba66694bd578b9c21a5a8b10d9ddf250dc59346de930d0902f036b74. 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/QZHN82431108.
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 0x5fdac2e1e1abb2654fb60d4320c0ba62d11ecf5857bf052571653a1d5323b32a. 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/QZFZ22415808.
The Holy Hunchback - דער הייליגער הויקער
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2a8eb6f01887143eb72d35be3b43b2fa8100839b0bc3fe30c3011a991d2145. 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/QZNWY2339618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b673672734d8d71ef35fa1a47652851eadab2c70420f4d8cccfaed9dafed3b. 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/QZHN32394925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b373b5e4f4e4a93971209151c6248b150bc4dc2eb478766e568d9a05c1618. 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/QZES62333028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b766f928d3c9ed9a5983dea5a6f9c2bd9130b849abb49eac747da69f5779eb3. 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/CAHQJ2021564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e548aecca2ab7541f87f89a3eeefdf92f2e66de392775a95b37e81899e7583b. 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/USJ3V2128629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260730b60ba73ff06a9f6bd136a6e779115bc81e17f2d9d441438d4a628e2668. 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/QZK6N2073107.