Schola Gregoriana Mediolanensis & Giovanni Vianini
{"copyright_id":"0xc5b4d2d791652a7cb57c6d5421bf6f3f6db4814a8efebbfcd1392dc4025b0856","name":"Schola Gregoriana Mediolanensis & Giovanni Vianini","registered_at":"2026-06-14T08:10:40Z","symbol":"NIM0391534","token_address":"0xc3b73182ca157ea2a7d675efbcb46dc1767a80b2","type":"artist","uuid":"23d4f58b-bc45-4207-891a-f57608f5df56"}
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 0xc5b4d2d791652a7cb57c6d5421bf6f3f6db4814a8efebbfcd1392dc4025b0856. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23d4f58b-bc45-4207-891a-f57608f5df56.json and https://artists.proofprofile.net/proofs/artist/23d4f58b-bc45-4207-891a-f57608f5df56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ad Cantica - Canti Gregoriani e Polifonie Medievali
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 0x702abaed6413dc659b8a649ca43a98309c6e63832cee308950165c3968752fef. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USJ3V1168053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d362eb62967d2d5cca8101c8fc13ce2e8e1c0bb5b5879fcd8db679c9cb0827. 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/USJ3V1168054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa3923316b716b33abc11f0a04c1bdb56c7333ad58418089b4a3cb45366ca4b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USJ3V1168055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa280228d4246749ac7e814cc9ffe44cdc85e1389afff97ab2f3628dd41b4893a. 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/USJ3V1168057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371efdf8a40e7a5f568bcd31323499343d235a25db1b41eb470b9b71255c1e1a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USJ3V1168058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e93767eb55b873faca9816034a72c9f7f6a8cdc16339d9d4e116186fec5d9a. 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/USJ3V1168059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eefed5921493768177bfcbd5d19d9cef576638bc98e25c13cb96c6c122e2b58. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USJ3V1168066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6400bbe2a944f74af04cd4857c33aef1af3169f48f3c4417299c0f8e370deea6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USJ3V1168071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc249d6c39a9d2d4686045a941fe3fe467adae5f6a71b2cff325cb79204410. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USJ3V1168074.