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 0x83ce43fc86bc234bed0685eb5d5807ec48919c0d292854a25418c782eaf106fa. 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/ea1cfa87-b22e-4ea7-9836-98e4f2fc54fe.json and https://artists.proofprofile.net/proofs/artist/ea1cfa87-b22e-4ea7-9836-98e4f2fc54fe.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 0x7f3567c48471122a6835a2a0b19d873a01455a9a801568a5578c4da1bf4783e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEM2258887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083bcd42b61ebca5cf628c4ed1f4bdbb9cd628e7459d3557adea7908943328aa. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMEM2258888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b831710afd858dce0f6a2082dbb4c957c47cb263b1c070d657ee3301e4f9b5. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZMEM2258889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bbac38c1e81a89371f90dad9dcc1eb3017cad96b535b03b0d584b2821023d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEM2258890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76daceb7b1bb73fe462f4df7445ac22972c037f3165999f30f55e3dc7a2bf1a7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEM2258891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3665df805a9aca72c1886795d00c5ea37605e70fee364b57652557e5ae143b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZMEM2258892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde33f4fd27792da213c0b2198ac081096e578dc0aaebcf3cea8210bc54508b10. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEM2258893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e68e9815c5eabb82224ee7051428d61371f7eadbd337f9bacd24b10f450a3. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZMEM2258894.
La polarizzazione di Cooper e Hofstadter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeeea67370a75378fa64c45c691392e48505b728ab67c53d5d85369ea492aa9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMEM2258895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6507acec91e731f9340983eab01c7a45bef29ab5c91234eec50d1a98610c048c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZMEM2258896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9297c05b6a7069630ee05680d1c7502f93b75a864b82de9aa0778d87364700. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZMEM2258899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae64590bc2025ac0b75e87ef7e2c3fcd2510903525547645b907bf53668fe7e8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEM2258900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0859cd66cb98a05fa6f27d3b44955ff65900730759aba56d6a5f180fc1a52a77. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZMEM2258901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc4c96d722aac9523a4a1c4b9b60a8cbfef0318163940dcf674d0bf7027896f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2258909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965413f30a4446a1c47225a047ae0c4e55843d67d75d69dcaac9c9627a8c3e3a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2258913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1cbc56e51ee7c53618434cc8e9f41b2e480b9fc2ad43afa457661fe8c3a51. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEM2258914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4f142131b8d597eae1d78b468850ab567aee5fa2ef5eb7c26c2fccd26db01d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZMEM2258921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc6d3493f3e62d630e6dbf19b41f8da9abe408de4325fa87b5453fa1dc238ab. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNWU2432053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95533e79ff47621bb412bbd4dc099e16328dc8d24728621b1b301c2ac209901d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWU2432065.