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 0x0e5952201980a00618e6364bccf96c3cdb0569d2ee3586fb96295484f8266936. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e5b5d68-b9c6-45f0-9101-88dd0a42187f.json and https://artists.proofprofile.net/proofs/artist/1e5b5d68-b9c6-45f0-9101-88dd0a42187f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Missa pro Defunctis in E-Flat Major, HocJ A1.3: II. Kyrie, 2. Christe eleison
Jommelli: Missa pro Defunctis, Libera me & Miserere
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 0xf7788bf23edc474e8c193b640499f9ece209750e4cb21cff29c90aab67480886. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007603 — a six-check JSON result.
Libera me in C Minor, HocJ E.2: III. Dum veneris iudicare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde31919eb26189e655505a78a41729d923db71bd16a1eb90fc9df574ddc1daa8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007625 — a six-check JSON result.
Missa pro Defunctis in E-Flat Major, HocJ A1.3: V. Sanctus, 1. Sanctus, Dominus Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd0bd59736edbe140b5eaea59bc554cf99db1e83838b2aaa928b7caacb1196a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007614 — a six-check JSON result.
Missa pro Defunctis in E-Flat Major, HocJ A1.3: III. Sequentia, 2. Salva me, fons pietatis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8da14bce1a32ec98ea6c6858b94e38a55e77b8386ad8437d644bab893bce8b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007606 — a six-check JSON result.
Libera me in C Minor, HocJ E.2: VII. Dum veneris iudicare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b59d4cf16c13fd6c025947a91cf3db436e0b91cd562dee45a893a4fa1c0bd6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007629 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II: Prelude for the Witches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbe8862174f4b8e519e4e088dea99a447b77fbe6733326a88ddf8f2a6efea0b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422303208 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II: Wayward sisters - Harm's our delight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef0943bc3683261ffeb96b843460ec5035fb46441506a815e5cfa257d5ad168. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422303209 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II: Ruined ere the set of Sun! - The trojan Prince - Ho, Ho, Ho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbafad8453e1c51a35e3c965b5b84440d256c21201423d74b8294f43659eb6f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422303211 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II: But ere we this perform - In our deep vaulted cell - Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38c98057ff47534f7a806d3b1375f148a56f017b4aa037a360f5dd07e3bf9bf. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422303212 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act III: See, See the flags - Our next motion - Destruction's our delight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf158743d50a821889b9877a3b1f5175650b9a6a0185f1263f835fe60e0663c78. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422303218 — a six-check JSON result.
Miserere in G Minor, HocJ C1.23: IV. Tibi soli peccavi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419f8101b99de371eeaa0f334302a09f0ee6cc1c01f3b841b525359c07d54d02. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007634 — a six-check JSON result.
Miserere in G Minor, HocJ C1.23: X. Cor mundum crea in me Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28519d4007d9b98dfad481a3a05ee4087cfeff627437bf2833dd51cd3092a1ba. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007640 — a six-check JSON result.
Miserere in G Minor, HocJ C1.23: XIV. Libera me de sanguinibus, Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e80a55d2cba9f5feaaf3f058d24b6c8f1a94ff6e70f14e791eb127da683458. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022007644 — a six-check JSON result.
Te Deum: II. Te gloriosus apostolorum chorus
How Are The Mighty Fallen: Choral Music by Giovanni Bononcini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c11aa14aa9e9c1bc4cff9e0f073049b99d7a8b6cc98d6709b16b84559db1f7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2490503 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2166d3db3f0acb1dc3c74cea5d019db095f2ad02c0d0094d383c72cd3e625aa. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2490504 — a six-check JSON result.
Te Deum: VIII. Aeterna fac cum sanctis tuis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de8c33691d3ec696be74c44ef287b840284f6d0bdbc1686fb84664f4668520f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2490509 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabf630f56e844d469ee2b2cb7c51b59633f20c78abd21e3a93ba8d728d2f1ce. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2490511 — a six-check JSON result.
Laudate Pueri: III. Excelsus super omnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a997556ab06133f6121a42885f8ed795a1bce53f56ed145c22f7b12d75bf1b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2490517 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817cecac9d47f9dd59557d3142ec2560192f3a3e066fa4c145728b44486320db. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2490521 — a six-check JSON result.
When Saul was king: II. How are the mighty fallen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5036ce42fe70f092eeffb457c01e285f65298d24e15e84d5c7aa2f79596833e5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2490524 — a six-check JSON result.