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 0xd9924ba2ea7483d68bd2077f009439c1c772741ca913b623cfacb7715ad956a6. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90dd8d6b-05fe-43f4-94b2-88ea674553ab.json and https://artists.proofprofile.net/proofs/artist/90dd8d6b-05fe-43f4-94b2-88ea674553ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choral Music (Medieval Chants and Improvisations)
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 0x44f5529592a013f1b313c65e95a3f320b242e7e022dfb95a4bc9e06fb76b1a8f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US8270501570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28a5f4f0b8d0d67d77986cf71b75ba29736aec7aa9e42773df595afd7aeecc5. 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/US8270501571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb7636af304d4f766d727087758e9d24f8d3460e1649a24c928562681a193f3. 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/US8270501576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6ba764b7d4de0aa9fa4c1b10fc80c0cca349371e046927b59e74151585be92. 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/US8270501578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb64728c894d0706d651c720cd8e7fd1858b14cdd2c54e1074d949d496d00a58. 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/US8270501583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29982eb1b45d2d56108f9a6b25e8fe71d886b3c45fc24a26a17ffbf340df5b0e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US8270501573.
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 0xda253cac5909afdd12fe9f1c496633fdf1ab6304091947ad8880d8d305989509. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US8270501574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae3c82a5ca4fcb4b435d42d48f5f3016aee8a74f92e92c6696734a6391179f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US8270501575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbc6a2104e50839c719d0651bda992f181643bad1f1677a5ed28c815f19fc64. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US8270501579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04e0fb9683e7038f032d9ed0f58518b7320a65023715696348bd3a60e4bb9d. 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/US8270501580.
Gregorian Chant: Holy Week, Easter, The Feast of St. Benedict
Christus factus est [CRC2542]: Graduale: Christus factus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187f7f67672a5fe612bbe49ea319865e45eb91dab00577a5350630010dc2c68f. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US8270502104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979cc6f23d313c9a324f6fe27f058974af39b99ae2076aeadd8ac8ee83e86f7. 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/US8270502107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d6c58f9286394d8d95a5d70231b167c699b79a8e5e69be7deeeee8de450e63. 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/US8270502109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e32d9d5f450e701a4f6d6b7fbc6766df5eaeb5edc0069aad603d3a775ddf28. 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/US8270502111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f86e8cd1214e4121c5455eb5a3724e4b81b6c4cd1228fc9e4c9626bcb0cfa. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US8270502112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3889e541c9107538e03995bf8b0425a2186867056d4892a954a1edb65b3cca. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US8270502113.
Feast of St. Benedict Mass: Alleluia: Iustus ut palma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c8107c1159ab915ce6a4487b02c48685008e8605436306871e71713f23cb79. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/US8270502117.
Feast of St. Benedict Mass: Offertorium: Desiderium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e78b10c25d7170e2a602afe7fce25c347dac0850922847ed8a55ea5c1ca7e9. 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/US8270502119.
Improperium [CRC2542]: Palm Sunday: Offertorium: Improperium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f61ff4bb117320225d3df9de04cd560854ae85910fe5087c47bac9d444d7a40. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US8270502102.
Veneration of the Cross: Good Friday: Veneration of the Cross
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0bb8a2ce184c645fe8cf2a1515371c22b838741a685a0d9fc12711342205b1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US8270502103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32876b45b184402c54e5ff34db94e694e4756824098a7e40d0797117f5eb0450. 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/US8270502105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d3e764c3ba54c9ea6fab481bf1f725c509bd1aea33a7c7c2f92373db80a09e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US8270502106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e0309041b8d30745d85a52a186e4e6a568ac9faeb0d1823ff2464235d0aa2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US8270502108.
Easter Mass: Sequentia: Victimae paschali laudes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f4f775d7aff75422d0164a6d2c98e048a56655ee6d3ea456ee571de940a9d9. 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/US8270502110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40258327fc0c03d85d2ab4973df84c150661674095d7bc84cc3ad1e328aaaf5. 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/US8270502114.
Feast of St. Benedict Mass: Introitus: Os iusti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4455ecd3a7510998f88e9d0d0a3facd2e982bdc4538e499e509cfbf3dc7abd8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US8270502115.
Feast of St. Benedict Mass: Graduale: Domine praevenisti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ce87f1a9832f1ab9b6fe8edc0944c4cd1408ea2f364a9ea71eb4908eaa176a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/US8270502116.
Feast of St. Benedict Mass: Sequentia: Laeta dies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec2a9f6a4b4e254487853776f4f2ec24b077762227697a406bebc7c7df7a421. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/US8270502118.
Feast of St. Benedict Mass: Communio: Fidelis servus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcf22dbe420b5a853d0385bbd4e061f5b8477069138c9e5b73fe7f4fb00fdc8. 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/US8270502120.