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 0x5c103795746782168e2b1a86a00b21f3b1e4dcdf8f36df99afd902511757abcf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0489678a-b04a-40a9-a493-2b05cd7cea9d.json and https://artists.proofprofile.net/proofs/artist/0489678a-b04a-40a9-a493-2b05cd7cea9d.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 0x5236d2b8beb82b217f45f6f9ad8c8dfe8bde19b648484f265468e4eeefc728f7. 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/QZRP42346503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50acefc19557987651c9a63b76227bcf203506da28ff68616aa8b6e01a0020ad. 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/QZNWW2309748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec70268e14cd074b8c891c0a52117f8fa20fc00bb1cb8a73e7f458b72359e71. 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/QZNWV2361683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5166d8e73fe4097a42e33ae67a7ff0b960ef86a682d3ab9a51b5b53fa8d860. 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/QZFZ32303386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c9fad6448cb5931318e11221a2f312ba8c6c333aec2dc2543030b0186d26d7. 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/QZNWY2228638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8e20216576c6a7e010dde545271db8da0307f9255f29742767bd54328e7ee6. 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/QZNWT2231686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba084494ae58928938c3d8352a340b07bcc4d5017046dab6323ae3a955965a32. 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/QZPLR2156288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56928a22202c90f113255c56a30b7b052e4f1efab6ad3d1495998abf602f5b7. 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/QZNWX2153284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b404a5323ae54784939e0c3e4ebf9262faf51d2be57dfa29d119ba662167fe3. 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/QZHN62113190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462ab483b7d2876c2e12db068b7855fd6f6737b341ffe0e7c0983b1113f9effd. 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/QZDA42117776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d7ec54a854e3b847707eddf0c225bd810e25cf79aabddc99b149b476217169. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN92057131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ea36d6e020afbe2ed946b614d4c55a5360c24da3f797075e1f9760ea651d6. 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/QZES52018174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18827002e5ba66a46dd3481a4365ae8cf51cde3258716561237cb77e22656b58. 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/QZNWY2344122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92081bf88084445ecf95a756251fb0e8687b7c954e5d3e2d8e52604c9551428e. 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/QZHN72058603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1cdf5a8f7a2bc1040112d71bb41e36ef2db899d8f58b886d402f67967df3a1. 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/QZES82003585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a29aec66e8a21182e6d8722cd02cc4e222bb7a7343cbd7b8ee19acebfe2518. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES72099045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2120361595949f0b7f985b97ba04caeb513ea079c660890e48d9dc12d4254787. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES92006434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b0bae87c4019fd5ad12134943156b3cd20add5d513f00668a44f441504d1aa. 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/QZES72000563.