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 0xa23a3f036120e163d0086b053bc4f5ff6c070da47bf267a54c585aac508efb8c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ac2be69-b4f6-4f8e-b168-dcc0d6082b80.json and https://artists.proofprofile.net/proofs/artist/5ac2be69-b4f6-4f8e-b168-dcc0d6082b80.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mahler: Symphony No. 2 in C Minor "Resurrection"
Joseph Haydn: Harmoniemesse / Symphony 101 "Die Uhr"
A Guided Tour of the Romantic Era, Vol. 3
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 0xb78832597ef19b938176d631801dad1d05115667d27aeb8b3838eb14c74aacaa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI191007701.
Mass No. 1 in F Major, D. 105: Gloria: Gratias agimus tibi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbf5cb4b3d8e6f02c758e14322552c4556a236974fe27ece3d5c671c6afe8de. 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/HKI191007703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424ffb9b2bd566058ed1e001ab92d88ebf71cd4227cb22513dad051da59d85f1. 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/HKI191007707.
Mass No. 1 in F Major, D. 105: Agnus Dei: Agnus Dei, qui tollis peccata mundi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff0bfbf914ff6b437ef528dba49241368a9b3d45ee8dedbe6454d41490b5256. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI191007709.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Gloria: Domine Deus, Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3934e39c532e0810a810568354df12bed40f20351e6b26f2c0cbaa5bc3369768. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191007713.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845f9708effd310642966b25a9a7db547a508c49998b39d65e2fabd54230b14. 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/HKI191007718.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41889d4669f5103c8e253b76f16052acad8eb0020618d04030ebc21aac7735fc. 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/HKI191007719.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Agnus Dei: Agnus Dei, qui tollis peccata mundi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dacef9a4c116ed12e21eba8e7366ad103a65123935f17397723d30bcda2b483. 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/HKI191007720.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Agnus Dei: Dona nobis pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3952170debc802958707dc496500c53599dbc33b471bcd1dff0a7f45dd51e9. 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/HKI191007721.
Mass No. 1 in F Major, D. 105: Gloria: Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa472e13ea6f36a8a7669d12df094cdc0173ef3caaf3d3c34db82b27fdb1a9f48. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191007702.
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
Mass No. 1 in F Major, D. 105: Gloria: Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424a024035c622f0c654a621f049876bf7cddc30cc78cf391156d98cda6ea291. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKI191007704.
Mass No. 1 in F Major, D. 105: Credo: Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb244fed6d927e12b4bbb2ec7e5e38f618d13b87afa07f502c59b89a2b6b044d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191007705.
Mass No. 1 in F Major, D. 105: Credo: Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff46fd22f863d52dc3d153de6a52820e79c226254b8ebaa1e7fd3cd3c551a375. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191007706.
Mass No. 1 in F Major, D. 105: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a7c4e3bd79adf95fc3c6826fa65e611b0ee76a98252642d70921f9ca51d31e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKI191007708.
Mass No. 1 in F Major, D. 105: Agnus Dei: Dona nobis pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadd425ffa90b69c5e116f13318442c2282c458db67aae339d25bfc5bbd61510. 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/HKI191007710.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53aa900a1208f713c008fa0b749037a30f4593f346c5220b27d9b84b59f8018. 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/HKI191007711.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Gloria: Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c782ffd05e9abee047356820876f6880bcab3e13e662381c9e1edf9b85ea1. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/HKI191007712.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Gloria: Quoniam tu solus sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4528fbc7ce03bdc7d7bf4ee5dcd957db521de10364d3bdca1e01c5d98823e8. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/HKI191007714.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Credo: Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44a391a3608877db55fd7c83c5b630ced56ee6c40cf327a6ac7192a1cc5c46c. 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/HKI191007715.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Credo: Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ac83cf61e95675b61d7e76e0aff7aba6dadadec1a5726a2aa841e907e1db2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HKI191007716.
Mass No. 3 in B-Flat Major, Op. 141, D. 324: Credo: Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa25ffcf791ad2b5bc589a52b56501665368aff71c2b0157b415a9dd3fcb7f8. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191007717.
A Guided Tour of Nationalism in the Romantic Era, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664797170fbdb19c6be30fe3709271102ac6a676bbf358060848dfba5e003b8e. 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/HKI190820104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08312ab8f7564205d343ea4add907e1ef84f6e3edd6dd3e6a6ef2a72e5203ea. 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/HKI199302504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bcbd1704b9edb324e6f9bd1a213a33e0829c8c3e905c8acad3d43bc5218602. 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/HKI190216605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c5a7a87604bb2bed27f348b469bbe250159045e69638b06c73ba74a8766811. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI190891719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c85ef9f50d5fccbe99547d3a43d32e3ec78c8dd78c57e9082b52f91ce073e09. 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/HKI199301204.