Giovanni Croce (; also Ioanne a Cruce Clodiensis, Zuanne Chiozotto; 1557 – 15 May 1609) was an Italian composer of the late Renaissance, of the Venetian School. He was particularly prominent as a madr
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 0xbb51a72e63d983556d006eaae84ca8b385451b0dd3ab21c53786f1da16d41e53. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2b49cd2-d64e-4af3-bbf7-f1b1b7fd5df2.json and https://artists.proofprofile.net/proofs/artist/d2b49cd2-d64e-4af3-bbf7-f1b1b7fd5df2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Miserere: A Sequence of Music for Lent, St Joseph & the Annunciation
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 0x0c332fa288b0b94a7edea3dfd002382cae13dae29c2ce70951d73f10b5478961. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBAJY1393801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99494d34312a68efaa2f5813b43a332055472e5c06850af4369cd191b4dedd72. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBAJY1393802.
Emendemus in melius a 5, T. 4 (Cantiones Sacrae, 1575)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644702bd52e27374116fa664bd502289908c9c195c6d27d1b24559eb255535c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAJY1393803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ba04fad35fe9779448dd0b2cde1f8379a50cb3aab2aa45de7e17e426b9aa51. 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/GBAJY1393804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b956f5f40c079eccbc796efea9a2eb106652b668a808b6ae4d33cfaf1613711. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAJY1393805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32ba82ea863b78e44d0598b4a4a8f399f33726ee2aaa5ce2cde8adcc0c09f3d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBAJY1393806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce178195d5f1c6ac67a284c0383cf4f53631901b50072fb0cfb4c1f66a0f2f11. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBAJY1393807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d55b67660459834b544ab1ecfa3fdeef79ecaf82978b80b691c29e7bc86d75. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730cad70d349b2418f9d94e08799bd12abb29525602062da459e1e8feeb780e1. 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/GBAJY1393809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cab0d4462c020080ce9de920029020e15959ea315e1894ce460462f3e270f30. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb7f50fd10f81738cb6e3fab7b307563cbf2dad3e166e96af5308b3fa5c8e48. 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/GBAJY1393811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e87342f9cbe7e134e05625a01874f2174bd3b516a1cab35a43ee940317141. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBAJY1393812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1994eda9ea11cdefb5636b01d426ca515148908e4275a2f620c6c3aa8052b4. 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/GBAJY1393813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb023c9dade85a5f4fada329c4d11aee154fceb9f131a792904b2164ac62ee6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dee72d2e6644cd61f6aa3068a61e3de8ecfa324eef2042beb8d82601d8f5973. 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/GBAJY1393815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46726a8a508777cdf131d56a06463678dba0a35ee22b66d3963e2808c8af80a8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAJY1393816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe4aa5f64ad00d6a6b868ae4fd2387b28689f68b19ea928b1a4525dd22a9c06. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBAJY1393817.
Mass IX "Cum iubilo": III. Sanctus & Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7809d935793c682eb9252d1c80a235f895fa0911b9f3eea3172ff8548ef1bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a28d3b161e709f63a9b373816a2411103290321466c4811655ab964bbc29e68. 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/GBAJY1393819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03a3987d063c9a4d0e2be832f21ad691e8fb77b14da672ccf3776fa73be3ef7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe58871afbaf8b3caad8085a9009216a12bc96825dfde8362569d023f4e4570. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b10e8af0c6d36be71bea69200f68de3a7a2ab58fb0a7e73a8f343656377a5d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9edd8f29327199b9687402ee9c6bc16b7cd25f4e2927030c358048597d925d1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY1393824.
The Schola Cantorum of St. John XXIII Parish
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc000d1ce7437d1f18e3861d1d994e753841183ad219707837159422005817bd5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACT1694173.
Buccinate in Neomenia tuba (arr. C. Alwes)
Texas Music Educators Association 2010 Clinic Convention - All-State Mixed Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9c8f84c6d897be31a8722fc46fc7c647b92976319774f758eb1957561f569a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USVZX1120307.