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 0x610797a896a7608043d88a72418c4e303b926794a9c224a865956297b2fc8057. 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/21fbf979-6662-4ef1-96c3-180f753ad7dc.json and https://artists.proofprofile.net/proofs/artist/21fbf979-6662-4ef1-96c3-180f753ad7dc.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 0x54cf687c8ea376d8c640e89eeec4e3fff0fbf289b0bf17b4db82bacd4d6330c9. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/US83Z1813501.
Last Days of Summer / Bring Back The Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50faebf062024d7964ac0097dd684766bf3b612afb4b06c16655298fafc74cc5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/IL4611801610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6b8340bc70a291a0c57438fda23c7c555232178915a333e545a0c285aeb9c0. 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/IL4611801620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7725afee305e5aa4e5a1ec371bb4fb762aad2d63b71b0dc43804e4d457e60696. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/US83Z1830918.
Last Days of Summer / Bring Back the Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c334678394c5fe6cb37222496773b031531a3bacd25431668acfe592a9abbb2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBSCL2089030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f259ffc1b882166442e9a74859186bcace53282db6c26c0d6e8529a1767eb2. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBKQU2083906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f60a08151c36151775b0b3db7ea780dea737457b915df554b324646a71eb20. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKSP42000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137ed0d6ed12c5099ac419bb16c322ed0167226aa6032f2533b7618650a8d18c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKQU2165029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d84166dd40edb4a0b9b5e31ecab1a7f2fa1a88d40556b7e95bd27b4b1ccc98e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBJX32188007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe974099501e60a232c2bd91a02841682041cd1158c5c3856bfae7299f295cb16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEBE72200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea3a4e84245c70f86fb8a9a1a34fe8d6ec1925c939bd51196ff38a010c7216d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:06:45Z), 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/GBKQU2341251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846184e704f0c7b18772fcfbcc90f994a2e43b2fc00ea1f51c722f01f8721e64. 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/GBEWA1906077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37c92731edd6d57a849522eca4db9a8fc7aaa843987a707baf4885e5732a3a1. 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/US83Z1919957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30e839132ffc34345c4af5efd947538b81b1e5154e0f41248862875339c25cc. 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/US83Z1811191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b60433c84126b3ed74f5622fc7a134f9dd3329ccce45b077e32644af8e5c317. 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/QMBZ92364318.
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 0xc519660af8b202ca3d7810e229df2efd7cd58d9b4494f6d983247f7700902fe5. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/UKSP42000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dd0cadcb429cd94babdf9c3ad63f2c08fb03e103cf7620495b83781acfad27. 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/US83Z1513456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adae8e3c9d49fa37cc824393bc5f460ae38901a4d7c5f8181924222dc232fbd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2101772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef19c054d154ebb4104d1b15ac4e43b37c66b5f986d65f57bdd59d5e7a12d743. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBEWA1905663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d6371b2188625cf7da78fa8e410b2aba3b84449175d9bd1e0148632408dfc5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US83Z1813500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409e459d1acd5f1f00bbe3a17567f5961d28948a9248f2b3655941ff614074e5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US83Z1831748.