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 0xe110d3de54666e6ada85cf28404af8b8672156be5a64e94e8655926f9dbb2291. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b126ba3b-a7a3-4a5d-bc59-f90757c8506a.json and https://artists.proofprofile.net/proofs/artist/b126ba3b-a7a3-4a5d-bc59-f90757c8506a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mermaid Melody - la colonna sonora delle principesse sirene
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 0x14bf969fd6111ae2c932efb59e26327b9fada12bf850890df94ccac5b60482ef. 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/ITF030701658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd865c2cd98b5c2125dd2572418e2d8e1af6becdb5a1cbcd4a09ec33c032ed3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF030701659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77213dda952d4358010c5bbb06008f6356cbf90e513e8c6dd7a31f1b35bec30. 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/ITF030701660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6259cc4a0970dff5d4b8e98dd0588fd39453a45d930818228e14068748fb25. 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/ITF030701661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ea5a903f53bfae5b94b887f41dd4e654a3b8f9c54c232216326ee1bfff7fc. 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/ITF030701662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb036e8151def4859b02fc235f525293e12af1a76c5dfc63a19011b6d45ba7746. 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/ITF030701668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc539c4dc01a191e665b4688645bd9f4d0605ac313f3211112a692030226cf659. 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/ITF030701669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51b6b2738020ff2cc7b22a3054883c43f8a383ebb9b325ca2aa68684753166d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF030701663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480cbc6bc391898e469a633ee3e5fcd15699d82a8eaa18bebc7f12aecf5b56ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF030701664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd49420756730a37fdbb04bb9251fea9bd0af159fcb6abecc0d063c06925b96. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF030701665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412e8147f1ab63b20dee9478b3feb5a92b61900081204cdfefa899687a06a9b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF030701666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ca55524cad408a68bbfa6febe54563903509e69034a070874df7fa4173b91a. 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/ITF030701667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341aa34c2ec973ee050fe50ce43c060d26fdc8994ed8e0f3ff94e9818ee777aa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF030702046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928fe8372745eed46d70c05082fb10e74e2f3efb9e3bb2b544e216921e24c26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF030702053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83bf1f14983563560030b3a44513bc75fd76be01516969d0db53e58c0c1be4a. 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/ITF030702022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89db23fd2ca646b6ac990437a2b035d5859f1882fa11239e7f7eacb64f0172c3. 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/ITF030903090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50acdcc89f56ab7c7ec20a8c5e960eceed01304ebfb36f755e23d5a5e964e1e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF031000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef42a6f2bf17bca08ef32f2f3e6ea423a71826c3eab72a6ef4d6af2ea3c65c3d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF031001708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5ae0d2fe45e4bbe41472d5823c9e7266e14a0d4c1b5a4a09c83d2867a85c9b. 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/ITF031001714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e1652021e400057fc9cbd710471ec4c7bf5705360ee4e90abc6a0a6e7f733. 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/ITF031001726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76304e848bb9028750f07e0be0ce086874bc07f4d88b23674d9bb69ba343fc50. 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/ITF031001732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c897b9e82f5d70d9323f883e086a49e21f9a1fffe6be349c1475d881b551bd. 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/ITF031001729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91818927a467cce60ca5d069ce2290bf87ea03aca21ed9a883d25a72248bedcd. 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/ITF031001699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5241f0303477ac7a97f95e41f0dacc9feccf405a1ef2a07d8f391b08cf0d243c. 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/ITF031001723.
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