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 0x91c3e6ee37a11a97c1eb99b94c8c28b485921a6e5fde0d6118b8e592e4c22f66. 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/16b9976b-0c2a-466e-a36b-4d7c5b826289.json and https://artists.proofprofile.net/proofs/artist/16b9976b-0c2a-466e-a36b-4d7c5b826289.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 0xffe4f9fa79601d40858324c6d3b463fd07f110583b74531530c4d39c46c4a98c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITB001000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca0994711fc9405429714f68178a99cb502563592776c9577db362270682bf2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITB001000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7329c0b6c55774f914aa25dac90aa816f635fcca01622bf8f63ea7ad295c171e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ITB001000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51608aa22f5c29a1bb5797f701c1d12ef30eb2b94560db7d3a7c229435a9fcb. 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/ITB001000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600cbc5683c17283a03c4b2d2100ceb617a55d72b12bc8279389e44a496307fc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITB001200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab09db041b92cabe33d5c482cac50a86c7b53cc5840d730ac3c949bbbeb7bfd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITB001200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc065343a1f68fe5c7d926ecb69c8ca23127d860043b53045601a84a643b11a6. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ITB001200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831fee85901a26071b28444d0e709eb90f7d8378ea74994d8071374c354224ef. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ITB001200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20263d716f5f5fd593095032a7c06d3d9da08d2e9c25efef4a4a91a581285447. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ITF7N1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0389439a22670eaf7924741e25650573f00f86b4dd2dd7438a7fff4980850cd3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITF7N1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6153c641f207f59ee506931de4bae473c0e4339c6a155adc975493f096bf71a8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ITF7N1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a74d0a8f5426537bc81c94f39ae68404d0430e4ae2d282f4bac761b636e572. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITF7N1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c371c2230e7bc1184ba8bcc13e4a6f60547db0b57c016bff584b783c06c685. 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/ITF7N1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7587a183d89b33d880f60b920f2eb0757cd4e473ff584b3b67eae89527ce10c9. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ITF7N1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a92b662509ec9525af9d8a5b4bb7f2d67e243fb34825468037da9f29fb16a53. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITF7N1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346629d2238e1fc269628535a17a1197e99062089399b07ad2b3eb455a64813a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ITF7N1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b958c78a2a43e8b1693f9806f82de49e82c063177d32b82e6f0a2622b6229d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITF7N1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dccf118699e3a9ff6ba47da20517bb9dd696d5261264063cef6ee83bf73ed2a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ITB001200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02b3e4e4e68a195930f10d8f39a0494e09917fb1dac2121821a1715c8b2d6da. 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/ITF7N1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca0bac7811a0b68856cf0ee8561b99c7cc8aaeb3ff96117f91ad61acf160da8. 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/ITF7N2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92136754d834c2620f8c74711016ced73e9b7006300e8368ac64d1a3a897dd1d. 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/ITF7N2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eae2c694fe5abed809d42e21bb3bcd0239e241b7419915002cc6631ec6ed24. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ITF7N2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9035592b7c80777fcf68ef5d27ff96ce4a2d7ad994a3baeb58cec64366f2649f. 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/ITF7N2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2165165d7cd22b4c567f1fa28e15d625b9873d56fa6f178dffac190baff7c7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ITF7N2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9373be28d125f31f418082074aea16efe32db5ac02414cb0f3286dbb66dcef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITF7N2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ff6f4f860d439c7151f7ba320a73b89f4a919c6e2693585c41c815f553dcd4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITF7N2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d511ac44860e82339dd78fe06189819126030604dea43de7a21405286700a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITF7N2300001.
Grazie per tutta la luce (Live in Assisi)