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 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 0xc30d2395f73a72f1afa310c4e7e2a7a0c900b44d496a328b70374fa821bec114. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0537cb25-b95a-4274-978e-95274d31acf9.json and https://artists.proofprofile.net/proofs/artist/0537cb25-b95a-4274-978e-95274d31acf9.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 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 0x33f554a7aedeccc011d5e1bfa9e0a5bf4baccfa8df9a88a6f67bc19f37eea808. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZTB82438535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3a2a015575f1cee186e0e1e9546c56ea03c64acf8611c486ee7376e3643211. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZHN42437827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2bfe8003cb8af29298ff508c782f10da3bb654bcb306f52b12e98eeb5647a. 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/QZNWS2313427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f59b1026c26a3274de58c697ffac26fe7078d1208035d54e97382257cdbb225. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZK6J2294390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbbc4f0194819f184dedf82d4a9ce6e695bad1d05af0efbfe1779be3e3251ad. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NL1AP2038146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c084315cc3ef2f7b4a17b751095856e9c0e6ec09de1189f4f745390d463142. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZTB72233707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5108ee1ec6bcb0e13a32efd67b60b1bdaa2963cce848b430bacf165eeaa564. 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/QZTB72233708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea00e08363d6e4670698f05526e17495210e9ceee15fa1214f5980bf7983695. 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/QZTB72233709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c1b56e55f62060edec7b767a425598cd3403a66c00cc934302703714eece8f. 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/QZTB72233710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246a5eeea87ec868f1b0fa059ff03cada704568e30b7cf08a34e6166ba04556. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTB72233711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13efbe2d49c899762f55af5b0565e8940223a0ee00a1c7e97d10bf6692ce06c9. 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/QZTB72233712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdf54dab3712246581788402204f111be921ee27063aeb8deca726f239f3dd0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTB72233714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cfa1a9e12cf387ca2316995e6b6f468461b0ba4294d3c6c4d3e63097aabc36. 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/QZTB72233715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9824f2615ea011dbb3d6e337b2bc72c8e4e846a4c1d0fedf9b21f8099e8002b0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTB72233717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a386ed853316e62cd58cdf9abc94b129924b9c92d62d363e447e725a6827c7. 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/QZTB72233718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d31abbcf3101c42ec8ed1f66e424433026ebbb4da79551f38816518a4683022. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB72233719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11be5588b76163aaea89aa7eb61620692178977fe670c7c99830c1ecd75639a5. 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/QZTB72233720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a803039dd7753df2f2fa28020385909c683b8b122f9c301ac7b1fc8ad96f97. 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/QZTB72233721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd6bb22ad3b1fe85ff27deecb15ffed1680225bd7c3f7fdb283400e44c46308. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTB72233725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096f775d48d3fec6334504d3b932ac3f53e69cc42d64e5d8586f6515c9f616d5. 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/QZTB72233726.