thumb| Massimo Palombella (Turin, 25 December 1967) is an Italian Salesian priest and he was director of the Cappella Musicale Pontificia Sistina, succeeding Giuseppe Liberto, and before him Domenico
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 0xa82da45cd55d717c9189d866495a1a65d7d3b2c9515c19441aba9dd1752dc724. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30c5fe02-834d-4a6c-9b25-3494d81920dd.json and https://artists.proofprofile.net/proofs/artist/30c5fe02-834d-4a6c-9b25-3494d81920dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Veni Domine: Advent & Christmas At The Sistine Chapel
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 0x6dc2db790d36455cb647afe8bb9b76663ca4b7f1a942bbe72455df259e2b0822. 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/DEN961700800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c803b6bc845df441b2e8a348097cc36a0f076b0c53cb21b86fbeabdd1dd7ad. 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/DEN961700810.
Motet "Hodie nobis caelorum Rex - Gloria in excelsis Deo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f33db361140095642ff440433ac6c26578c01c48c3166558c495a31d1d71e28. 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/DEN961700840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939546fa9f8471d58822fbf547e02d5afa38bf5b73817409eac5285466e30202. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEN961700890.
Motet "Magi veniunt ab oriente - Magi, videntes stellam"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d6f7073d27f2be311040ba46bf3cae03af24c311c2a033b432a13bd6a767e4. 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/DEN961700920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbb2b25eaadbfb4356476004912238f0dc9e6b4a769af6f3f98ca9ebd4fcc73. 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/DEN961700930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7200aefd2e1fdb77324a2c407237ae9554350e523631d402353e62197e86183. 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/DEN961700790.
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 0x3f53d9ab4cffeacd095394f4d06f1575a7d9072fcf666712bf722e6382c47037. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEN961700820.
Motet "Canite tuba in Sion - Rorate, caeli, desuper"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a277391d81b2a4567fe8033c7df8185c79778b1dc7eb9d8f79c6ad3d46a653. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEN961700830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4fdb9e8af1a891c09ac1c51e4667f04f893d5e4a0f5db32fe612299c00f190. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEN961700850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868bb034a73fe07691a5ab08fa74cb26bf13ecaa25ac189dabc403c3139e83eb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEN961700860.
Motet "Quem vidistis, pastores - Dicite, quidnam vidistis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36618ebe2a6c468ad2b529482b17b59b29052ee602a859da6e7148105b53183c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEN961700870.
Motet "Dies sanctificatus illuxit nobis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa3fe9601adc8c8c22a0114b2476d261ad2dd0131c16d270aea7edb4c2c6609. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEN961700880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c2523deb416f8f58d833e4647c73356e42f78c665b62ac6637a2c052ce088f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEN961700900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4789721ba8d00350be5f57682a89b93426ce244867a431f94424269e9dc63c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEN961700910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23907cb36329f773e6e6a5574cac2a26c9126049472d077ffd3e7b9dde1b2de. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEN961700940.
Cantate Domino - La Cappella Sistina e la musica dei Papi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26774455336629652e1b3d61fbcba3aea1195d2a055368d5fba3238a4db57f57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN961500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc808c2b070f315c9a10070a60f8c28b90b0afb4bc1f0538028828f57ccbba2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN961500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c3560c8ea862b6eb9ace0a0338cd89fec78eea6662421232d3bc6df052513a. 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/DEN961500560.