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 0x5b207e38115c31af8fde2f735687ffe28cd366454b2f48d999429677f8ffd2c3. 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/99966838-6088-4d57-aab4-4c9d686cc64c.json and https://artists.proofprofile.net/proofs/artist/99966838-6088-4d57-aab4-4c9d686cc64c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x4a43b8edf1f226becc5fcfa361a7899b2e0265f588df881bc8eaeef7cd0fb4f2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEP2137849 — a six-check JSON result.
O For a Thousand Tongues to Sing (AZMON)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e14b6962fa6bc60dbb30561770e2fe884a54a6e11ed5d30ba6283e965f9c0de. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEP2137855 — a six-check JSON result.
O the Deep Deep Love of Jesus! (EBENEZER)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35a420f9784afac92253b7bb390b18f1363a6add0c46050572ea3342d9b1c11. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEP2137858 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec383dc8087243fa394de2dfa10c01f5e1017a7441e437331ca42bbd8df2623e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEP2137865 — a six-check JSON result.
When Peace Like a River (VILLE DU HAVRE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81979497afa076143db0b7116235e0831979b5d8f8c081db744c91bfd0f7ac9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZMEP2137870 — a six-check JSON result.
A Mighty Fortress Is Our God (EIN FESTE BURG)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca8a075beecfe4de3a3c4c6317d2b8e6815bf497d60c54bdb104ad25e6583b5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEP2134382 — a six-check JSON result.
And Can It Be That I Should Gain (SAGINA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e0f88ed40d9e51acd0b05abfd1d5bb5c1a308d80f1a2bfa1b4b275855ff8e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMEP2134388 — a six-check JSON result.
Glorious Things of Thee Are Spoken (AUSTRIAN HYMN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601377cfc14ee70ecf8bead67df4462dab56a8cf3e3785d11343d1cd30c14bc4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEP2134397 — a six-check JSON result.
Christian Dost Thou See Them (GUTE BAUME BRINGEN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32709d22c61c0654b08a8c6ede6e8350d9f4cc703362449df7606acc5780a9c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2134324 — a six-check JSON result.
Forgive Our Sins as We Forgive (DETROIT)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3e356e37a72021e78b92dcca8a9bc7462f69ab2537325ead991b57183a6cdc. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZMEP2134326 — a six-check JSON result.
The Son of God Goes Forth to War (DORIAN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c61521382c87ea798f3409190d4bf4275a09fd1af29b33e5aa3c849999f31a. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZMEP2134328 — a six-check JSON result.
Ah Holy Jesus How Hast Thou Offended (HERZLIEBSTER JESU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7433609093b0ae2fd70ae093261e36fd4ecd13bfee173345b2073587540662. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZMEP2134330 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79ef5b8ab0f7c9e761062e1c105914432e28d96427b80c0dd7266f5ee54e2fe. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZMEP2134334 — a six-check JSON result.
Stricken Smitten and Afflicted (O MEIN JESU, ICH MUSS STERBEN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0645a621c99452ddb2b15617d521748c07d72239030b5911f40ea26ea4595e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEP2134338 — a six-check JSON result.
There Is a Fountain Filled with Blood (FOUNTAIN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f93888381df56bcd4ce4fdb8cbda701ebc2a9a82a25dddc17db1cd44c0367e9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEP2134339 — a six-check JSON result.
At the Lamb's High Feast We Sing (SONNE DER GERECHTIGKEIT)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d53cb56749b30849a94c812242d2deba534477bcab7a538215cfbc059e0d49. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZMEP2134344 — a six-check JSON result.
All Hail the Power of Jesus' Name (CORONATION)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15799d11efb478b0aca923ccf366c95e71ab480db90ee079c950170501ff8396. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZMEP2135832 — a six-check JSON result.