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 0x145d0273acf27bbb25ddb8dda71a3ec4807056afb71a9a63cbe0316a9200d392. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa2bc1c9-ce5b-4931-bf08-edb397ec7f1b.json and https://artists.proofprofile.net/proofs/artist/fa2bc1c9-ce5b-4931-bf08-edb397ec7f1b.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 0x0229310d887c210aea38eb1d71d85198aa34f19607437b4ae197f9e27a4609da. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JP92N2425453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94298af3df85f2561123f1b412b9b7b7ec5ab2d66fc008dda291bfdf3764c67a. 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/JP92N2425454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370a6692d552ac7b570c05ccd31134ee3e9611f27cf7567de2b8cd80369f4a3. 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/JP92N2421394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe57d781f1d08eb3f2936ea76979ad0e715dcfeeec43ab9867116c551311ca1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JP92N2421395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67615dcc357902905dd582bd8d99e2c31998468acd1c01e5d42d2a1bb133cb11. 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/JP92N2335580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892254ee1b46b46834cea13e94994fa868bd5477fd029dbb58eb0f46f4066b40. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/JP92N2329486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b9bdd272909a4075b34dc9043f081448e359932c18e63d11777a074ea52d4e. 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/JP92N2238915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb517cdefb9372073fad9187b84d076e7799811f4a476a695427b12b7bf68918. 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/JP92N2234644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1d4fbbbf70bdfd6385af941a661ad1c1b3910a14475964ffe548e00554445f. 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/JP92N2241469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7d5e549d23581cebc26c20229396e56183530159132dc06e5d1803e18b953b. 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/JP92N2241470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b9bdd272909a4075b34dc9043f081448e359932c18e63d11777a074ea52d4e. 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/JP92N2238915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed0b7d240a62b0709dfc789858e3729e402c0c7922e4fa741a4585a300259f7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JP92N2202681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63092ff71153f8c9fadad013a0b4b0a24efec523052b312b6c161790f5ee42fc. 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/QMQGC2100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda85e9a3ec3910019f8d99f1da8fcd47bee24372b8f1e6c0d3c0054c4fba599. 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/TCJPK2039385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7856c0ba754086bdfe2160004148452886c9e5e09e5ef319d606ac9bb630386e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCJPK2039394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec8f502df137f30883eceef83aa80d3daa4720376e59776994eb10478384674. 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/TCJPK2039411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f49785f40246cef80dd50bc00a177d506f74504009633cd944e50a753a20917. 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/JP92N2443375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9ecd10cf5a39c8c067a1cb4bb33e50ae0ee2ff48ecc020a7485e182ed4f72. 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/JP92N2443376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0c9fa34c862132ac68ccbec3b4bd94ed387026a1f771811544eeea9ba38f17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JP92N2506751.