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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 0x76b4a4cdcd700fcdf03f397f009f22e4885e9542cfc1f2e96fe40499e8ae9502. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/785c2062-e2c0-40f9-b14b-fcffe2d600be.json and https://artists.proofprofile.net/proofs/artist/785c2062-e2c0-40f9-b14b-fcffe2d600be.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 0x6162fe4ef36884816f4091be0060be24e1fadddec3b471dea37c36caa2eb1457. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GX5MV2301281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bda07048fb34cc1887ded9a641d075f70a923331df2597a3038ac3e767d63c. 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/GX5MV2301282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9a18f93a2f1733a386ab9577f73242dc6e9fcf80db036a1823b5c2e214d2f3. 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/GX5MV2301095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa273b7ee8f75ac2210552661c0541935c009d1b43e468acdc37d715c9d846f98. 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/GX5MV2301283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf606d2a748e41581693810466d2face8dcca60c722c355eb9c26fffeabcc2c38. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX5MV2301284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053310cecc1309b1965f8e322947e1f4a43944b7d70f6986e7d35307fb666afe. 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/GX5MV2301285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b5a390308de03db64064384b8433113b0707aa31523a0cd366d20b05e887a1. 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/GX5MV2301288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1db6deadff89b9c8cf934239a80deef4c4d716e9e0337e97fe2f292d93c7104. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GX5MV2301289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec44d2d2fa9711aba46afd4bc26431fa68609f3d72db8c1ceab6e173a9d45630. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCAGP2208928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1f1b88a95cb6675f29494ffa6d776e8bc44a7f2e24795ccaa0b79fc2675a32. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHU2404510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de1e8ef04f3f1bd5427b09e7deaf95bcb95b8c99ac5de6e35b0fefc1682137. 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/TCAHU2404492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1f1b88a95cb6675f29494ffa6d776e8bc44a7f2e24795ccaa0b79fc2675a32. 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/TCAHU2404510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de1e8ef04f3f1bd5427b09e7deaf95bcb95b8c99ac5de6e35b0fefc1682137. 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/TCAHU2404492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b36b9bba28f82d8b870613880c030802d06e73b8d23fe0c02e20e367482f24f. 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/TCAHU2404530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cda87cb70ef6521aae16931e4892adcb4822daff301ce4a9d9107e94102845. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCAHU2404566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83965a145e475bd9e9287650c4e5ece54ff3128f4997a8def2ef3641dabbecc9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAHU2404587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5709ba80c6637f6250949127db9ba5862a7aff75d97e27693f006a83765aaa5. 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/TCAJG2523222.