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 0xb7b268e1c6729ba95b4916d7ea82592512f2793560a06832962748d3c115f3cd. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2f78e7d-e247-4c19-88c3-c26cbfc84e6a.json and https://artists.proofprofile.net/proofs/artist/f2f78e7d-e247-4c19-88c3-c26cbfc84e6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stabat Mater Dolorosa à dix voix: Stabat Mater Dolorosa
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 0x4cdb3b0a05ce51dc56a03a57891fab8518424caaf66b14cb17a3b8e11ca7de0a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ179900750.
Stabat Mater Dolorosa à dix voix: Cujus animam gementem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff3c5bf790a21d4fcf636b893099c3583283f37da0874fede24ec0fbdc7421. 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/FRZ179900760.
Stabat Mater Dolorosa à dix voix: Eja Mater fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b4a04b0eef0fc2210376d6a48d8d17d63ab9226e0a2ac2e4925f5bccd54fd. 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/FRZ179900770.
Stabat Mater Dolorosa à dix voix: Fac me vere tecum flere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7cd1225780e76bf904e86bebca5dfe872e88c2b3219b1252acf9415044e3e8. 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/FRZ179900790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb50b6e815a563dbe4c3c889d65d3423a540aed7868fbe0971c056809cf0cfe. 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/FRZ179900840.
Te Deum Laudamus pour double choeur: Te Deum laudamus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9f53adacb096183fff4b4359078fd3989b439570cf7a64411cb4e6be07e91e. 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/FRZ179900900.
Te Deum Laudamus pour double choeur: Te ergo quaesiumus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3652b81c0dd7bff27698a13dc623a4e385cd2b8e9f6d8ff737317b96471d9fb0. 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/FRZ179900910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c2c8d644fa1c589c328742b06cc07fe4aefacf0685514e79e7b4669505d5f1. 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/FRZ179900920.
Stabat Mater Dolorosa à dix voix: Sancta Mater istud agas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3375f7b47a1b06263bb2c12d8df96e64e9861e86e465acd2c1f121ceea7c7837. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRZ179900780.
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
Stabat Mater Dolorosa à dix voix: Juxta crucem tecum stare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2138e55cada55ff4689bb7e5b56892b4b30f0ee03367e8b90b3605b259baf5de. 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/FRZ179900800.
Stabat Mater Dolorosa à dix voix: Inflammatus et accensus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb243e0c33ed949089512e6c70f02f88764ac5d7c2b6f305d800a080a7f935675. 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/FRZ179900810.
Stabat Mater Dolorosa à dix voix: Fac ut animea denetur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc05ee4b9d2a1c020ff05186d3b7290e363b361898ebf3e7f72b6209b4dd2e79. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FRZ179900820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16696d8fe0b47ebbf68b6d4eb4d773db7785164f7461bc23eeefca0a8e4fa31b. 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/FRZ179900830.
Messa Breve La Stella pour double choeur: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d87aa6f1303250395ba833f95c88445b1fc953a4c2860ec35d6a3946255e9. 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/FRZ179900870.
Messa Breve La Stella pour double choeur: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c870e3045e9d0ecdf92ffac493c295d9c0844d8d79704111d2c1fd81dc66b. 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/FRZ179900890.