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 0x84663cc99aadf399ace076dd672b2d9b62fd5ad624ea92e4a10feeaa349f0bbd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeee4d47-52d3-4a44-a734-17881927278a.json and https://artists.proofprofile.net/proofs/artist/aeee4d47-52d3-4a44-a734-17881927278a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Laudate pueri Dominum, RV 600: Sit nomen Domini benedictum
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 0xf89a054c0879d7fe38c73cc35170301aa7fe489e447a58ee1a4218b2b1fac16d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190566802 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8de4279ba36e96839fc7675a05429e1c99a774e99abd947cd9077709f8ab8e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566801 — a six-check JSON result.
Laudate pueri Dominum, RV 600: A solis ortu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1cbde104a11874648659d08d876bb8151b7ca6ec64055839292e302e40ba38. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566803 — a six-check JSON result.
Laudate pueri Dominum, RV 600: Excelsus super omnes gentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2630cd15096b4481f414b2df43da372d15ced8207e32938c67ed8386871e2b2e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566804 — a six-check JSON result.
Laudate pueri Dominum, RV 600: Quis sicut Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc140f01791f37dee50cd73d108e57b0af4e6b8ff91a0ee34cd93d34e405aa2a0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566805 — a six-check JSON result.
Laudate pueri Dominum, RV 600: Suscitans a terra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af9439d6f53a5c83cf2853569dff42d5e7e6ceb06996233354163226b39ced2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566806 — a six-check JSON result.
Laudate pueri Dominum, RV 600: Ut collocet eum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0cc78e650f2cadb71deeba63b2a741a052fd311920b409715876aa7fa684b6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566807 — a six-check JSON result.
Laudate pueri Dominum, RV 600: Gloria Patri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afcd6261139b677520e0df05435edc78a0555b9821a7cc96b6264d2b8cba681. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566808 — a six-check JSON result.
Laudate, pueri...Sicut erat in principio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2961bc1702b177469dc0bb240146cddff6d45a74a6e4f954980ab7c1d19081a4. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566809 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f4df6f7d63227ff26b00ce929563ebe833fb25d1fa694ec421b2b44bff7a8. 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/HKI190566810 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4431af4c1ac128f8145103188d79620648c5051650728e7a195a6fc26dc46cb9. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HKI190566815 — a six-check JSON result.
Canta in prato, ride in monte, RV 623: Sacra fulgescit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9b5b884c532fd59c6649da278e40a5e49e812592166a56cc668ac0f74368d3. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/HKI190566816 — a six-check JSON result.
Canta in prato, ride in monte, RV 623: Avenae rusticae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2dbc4720db2ae9e3237f0e488810a345fa1ead4e924fabb37f8e9373ac06b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/HKI190566817 — a six-check JSON result.
Canta in prato, ride in monte, RV 623: Alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4601a5f4ecdb1734038cdb978b826f6c39a7964f241ecd6e178131d7d93de9b3. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190566818 — a six-check JSON result.