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 0xbd174673582c65e719aa10ad51a24609fe8b6e7202c0e163b53f09b3df2f3813. 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/128d12b4-f750-42b6-8225-80b8f5adb612.json and https://artists.proofprofile.net/proofs/artist/128d12b4-f750-42b6-8225-80b8f5adb612.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 0xb5e9463730fc86fbfdd3430a967188cd0cbc7bfefe6a3780e369ead60765e200. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/IT0682000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a93972d422fbd2c70f97eb91984e6a0348efc74cbb264cb09b9bca4bad9f4ff. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/IT0682000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d58b8ddd0e3cf786d2f0ae12d11fb907a4c3671d770fd4ddafad6f16705ab33. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IT0682000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75227ef69ba393b63a53cfe776d7cde0f544512be7245ca1b1ca1b994e02908. 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/IT0682000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d81a74f5cc7000e0429706cd163e80fae7f2381cc0977013af9f44cb4f1af. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITD541100705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c97a9692b982e10d73ead5761622423132d3515283fc5d3c263a5140afbae6. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/IT0681300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ee8067a9f84bfe68d9cf6680a5009c4ea0ea1ce888e4257256e162a7d1abdc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IT0681300106.
Terra e pace - 1915-2015 cent'anni di gratitudine -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71147dfbd2cb74c57fd5ecb9a40779f249e227af176fa56ab67c748d4f869db6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/IT0681400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c2f37717ef687718b57c4d79c6efaae34f7b6f5420086cb0fb3683043e70ea. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/IT0681603709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d12f4539ba7ec7834431a395b0decb67743d49937807c7bfc0b4c8316002eee. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/IT0681603715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc695cd028f8d70f14aa6d73da1d22d56c744aad7d020a39f02a6aa810adb8bf8. 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/IT0681603716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1576b39b884e3dda5d0e83192fd73e4f72cb93db0122b0e86b5a095ce2188. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/IT0682000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11040f851926b283e6f117bc1ad10b4ee73e3cc5741b7b356d81515fdcdae613. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/IT0682000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa835b38238eee789dc2841ccb22f9ceaebfb9b75fd55be45ac088045451ce5a. 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/IT0682000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74556602ccddb075417d4bdb90098f4c2a69048f434b1a7f6b1848d442a332a2. 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/IT0682000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c7b2ecbe051f671e2a6522ea5d7eb086da351463faf82eb07115a48d387673. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/IT0682000012.