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 0x33f8e3c5cdbeea5430572e4cb9926e6398d8d9bb53af8029d2fa8081e23c3329. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45215838-fa8e-44c7-91f2-7c138c15b2b6.json and https://artists.proofprofile.net/proofs/artist/45215838-fa8e-44c7-91f2-7c138c15b2b6.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 0x4ec29111196910325d6de05aa4a51ab15d21a699a4d4fd208c56aed0048a84bd. 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/QZHN71924551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9333ef1f877a59c118e8744b2736e23a565ff6bce5b953fad86867cf1f0a59c. 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/QZHN71924552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1292f432ca818644c09fca8d530990bb2da1f8fc3140ced3a6f2518053a109fa. 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/QZHN71924554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae73ced6dc5a0c2604406374d1dbb87ec1632fd1bf5a3555c56086f5cd6cb60f. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZHN71924553.
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 0x8c7c0282701b77be818bfd544a440494547231d9f56f9b411c7f3906f9419be4. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHN71924555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca0293eae2e03fc0cc974da0a9463f1f94180aca6f0ae6ac920a7891190882b. 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/QZHN71924556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e9e7f9ab02f66b61336c95423c2deaaf1c578c83726928dab63a5cab4c1096. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZHN71924557.
Nobody Sees the Fog Eating You from the Inside
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff0a2441daaa4c9a66def6e9ac56e4074246ca54503381ca02028346171315. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZHN71924558.
If This Was the Last Time You're Gonna See Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5744268a4dabb6014626fc18bb0335937a63941016815754a5f39e4e1d7c366. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN71924559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32b10f14424045eaeb2b737ba87f18037dcb905cd425f20d67cd781cf4ec2c8. 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/QZNWS2410947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6939a34202a9f86e932c69bd57bb278ba1eacd6b5fa60562a6fb33edeb86e66. 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/QZFZ32019788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f84d286013261989c4ced0e6307231452415462b4f847167c54cb2938155e55. 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/QZFZ61952097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f1fad6a308fcfe307df1d92be24fc0bd708df40a7f587bf81e6b8a683171d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES81941500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd5a1c720ddf09eecf26b0bf8397fc6a812e62b56bb7920911f7cb38df308cf. 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/QZDA81980709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f7f7aecc6d0829abb9eaf49038abda4f22d0f075abea77408e1f360eeb080. 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/GBKPL1940817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c9ffdd24b1b6e5c40a7418f765c3a085441f687c37c6be1fec32d75929e858. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZ8LD1958028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5936b29d33834a3165923a9c8d73071e87914b2827c46b9c5785b2993674ef3. 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/QZES91818825.
At Least Don't Rip Out the Last Page, Thank You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af2b1780a07966929998744585cd0b95fcc44bb5be69c49b5bdec84ee3169a. 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/QZES61829430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558492867ab67e8286d996079a956190e68b5621182839f349696dbf96bf3e52. 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/UST8K1802909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade70f020f99225b3d7ca657f1e921a025d9a85e63aea12c490d4eb0359d008e. 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/QM42K1899770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020e2e3f399075bc96a1b1a473a6d9260ac1e589f3d891270d1f58e3645c441. 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/QZDA61843057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc34d9a150afb2109768339c0ec024e11c092694012030f26ffbf309a1a31a9e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM42K1810369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431ee0b3a2a6d269f0baebe6fed6b29395b2a6b16e5b98f07a3f36af4b3efef4. 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/QZB4J1830294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef85e5112fedad76d57e3c7369ca8dd7ad2298b290393ff4817d42bf833f81. 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/QZFZ71902391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c67339b38215651a094d784eeaf1af8a52d4fc7f9c9455bafe6f8c2e52250fd. 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/QM4DW1872926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8dd7e613912acd33f2d3ccf37f378d36364bffbc9649e07c2ad471f10f7e5d. 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/QZBRF1862310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5c0421658d05ce5d331ae8d1161b4132e30119b0a406a9261892c656d30330. 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/QZANL1774726.