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 0x75ce941212c88319d82d481614543da37ce3681f8466919d70872cf8c280beec. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea6fb694-2651-48ef-9fb6-fbc42b7cc901.json and https://artists.proofprofile.net/proofs/artist/ea6fb694-2651-48ef-9fb6-fbc42b7cc901.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stabat Mater in F Minor: I. 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 0x04b8644c149e00505b91e8a29d389fc2c2eb7b57af8e0f3a27e9977df951b3dc. 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/NLY330604217.
Stabat Mater in F Minor: III. O quam tristis et afflicta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f363546ed6fa273fe17b3c3afb438f1cb005eb1dde91b365b2e46c3d583864f. 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/NLN580591571.
Stabat Mater in F Minor: VII. Eja mater fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff02277ce95a9e653e220753d44f1c8ec7f541ced94d78b5277062185fb6bdc5. 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/NLN580591575.
Stabat Mater in F Minor: XI. Sancta mater, istud agas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c54d9de77a5cb74466a807a02854208217dde78c198d8120bb46eb80ca43c2. 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/NLN580591577.
Stabat Mater in F Minor: XI. Inflammatus et accensus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee664d8b7ddd3d785b85de7d1cb21cc6b52d6b2f815e19fdadc4ce8ed9a812ee. 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/NLN580591579.
Stabat Mater in F Minor: II. Cujus animam gementem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa83c07d7f5c60b46bb00aa24a73d997c33f030e5302f4d5b33870a46303f7df. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NLN580591570.
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 in F Minor: IV. Quae moerebat et dolebat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fed147746a35803257e12b5051d13ce12048bf7d9f9651d90df46808f6a465. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580591572.
Stabat Mater in F Minor: V. Quis est homo, qui Non fleret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc78e5e69cf899016c117272ce764320acaf63907097e45b0c677590b54fb36b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NLN580591573.
Stabat Mater in F Minor: VI. Vidit suum dulcem natum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c0426ba49773f61566da1c24da3add3f2e2e44d4fea6c9b5c3638110fc13a3. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NLN580591574.
Stabat Mater in F Minor: VIII. Fac ut ardeat cor meum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cac532fd32f65efca669ca62ae86939beb1fd06d3d1119c3b94dfcab69d6ec. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580591576.
Stabat Mater in F Minor: X. Fac ut portem Christi mortem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ac19ffac2bbc819b241e1977c56ae6bf87223fc4b7e8c17937aa3de934afd8. 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/NLN580591578.
Stabat Mater in F Minor: XII. Quando corpus morietur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23178a536dfcc91258ac576b882134ebb0a21dbde5f6fee2c839e6b629ac2f63. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLN580591580.