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 0x98e56ac7ab57dc90a958b81749c0029cf2a6dce5dfa44b915862630885bab589. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2984f5ce-1436-4475-a23a-cfa2666b4641.json and https://artists.proofprofile.net/proofs/artist/2984f5ce-1436-4475-a23a-cfa2666b4641.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
First Time Last Time (Live at Teatro Civico di Sinnai) [Live Version]
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 0x7eeb33ccc9b4080554af61b6f693059819fe9ff8aef69ce9aaa4966629c514bb. 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/IT3CK2400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aa28553e12c3aa7462bc9fb110af02fd5c54367f15aac9109d6278e0629375. 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/IT3CK2400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e32ff83ed745ec578c2a15594927cde54a7d4d1fa20b08cf2e6dc32e72baefb. 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/IT3CK2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210cdb2fd4f8d1e7cd76cb0042dcf97051c63d4ac1f5643798316a6f4e8cd33. 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/IT3CK2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c04933b61c2e1d5f62fe134f9aca557c04ae8d36327e4de86d3cb1eefa0e227. 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/IT3CK2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88fdfcee44389a099386e3028b9005bfa4ec3c6de3135e8868da3385aa62dea. 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/IT3CK2400160.
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 0xc3a33a695d64d1aba2601c620bebd52fe81aeeaee3b9dc287c16728683f733cd. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/IT3CK2400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127253d82d50d3598742fd132b8599285055f869469791902956a2650ecfe95b. 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/IT3CK2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce698b3393c0117aa2a0debd22454f16e8528c84afa032776f6e7ed186f0e936. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/IT3CK2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422fb4bc6e7cdffd0881cc6e1086b40d89aa4a6e6b5c3ee8e1e26a9b2353e774. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/IT3CK2400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9781f3e2bd2611eb34eadc4ffd6c6eab3e843ee7388b561a9531c90dec5b15cf. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/IT3CK2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d1e5adf43cafe41e94d72b047ff54cd128b5bccebf437399cf75d378f20de4. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/IT3CK2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cd7d25bc4bdf17c7cb7a08297c33c3978e65583986a662a86e0bc37ef832d7. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/IT3CK2400170.