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 0x09b5a4e7169caa1e310e6a8e1efba9a4c647a086cf027b3acfdf5e2f8f079dd3. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d188a9f-a91a-4c35-be89-6d4e1fcf3c66.json and https://artists.proofprofile.net/proofs/artist/0d188a9f-a91a-4c35-be89-6d4e1fcf3c66.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mass In B Menor, Vol. II [Audiophile Edition]
Mass No. 11 in D Major / Gloria: IIb. Qui tollis
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 0x44631bcc21456840acc3a39f183cc5f1077f0069c9b914601ffeeb7b00927080. 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/DEB111500703.
Mass No. 11 in D Major / Gloria: IId. Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf192ec07ab74c31b5e05d3284e2bad3daae3a25bba441015cd2ab72941e33505. 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/DEB111500705.
Mass No. 12 in D Major / Kyrie: Ia. Kyrie eleison I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97364b4f7ccb36a813dcf7fc91fb3c8ba92ba9655b7c6b60e9a9ab47f605b883. 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/DEB111500717.
Mass No. 12 in D Major / Kyrie: Ic. Kyrie eleison II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16f4bfcbaa8dbb7ff3b035021db8898667415c4d5c321c1a204ccdbaf2268cf. 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/DEB111500719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd7757473d5f95da65ef6cf86cdeff41f65e7c451f6c9fba0d5c49d25756eb. 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/DEB110902701.
Festmusiken zu Leipziger Universitätsfeiern (Jubiläums-Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e2c2959319ec66cac775b9f8f6a507490e405d38e8c41d50e1ad0bfcd8cdc0. 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/ATK940625403.
Salvatore Sciarrino: Luci mie Traditrici
Missa omnium sanctorum, ZWV 21: Kyrie. Christe eleison
Jan Dismas Zelenka: Missa omnium sanctorum, ZWV 21, Christe eleison, ZWV 29 & Barbara dira effera!, ZWV 164
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da39accddf7f59283a9e3247f4c5c67f74974061f7598c61554c81f91904fe. 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/CZA301100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe284c6dd0a8234c8640c9f027cdc23c3ba4b51bb45a18c4c098e22053138dd7b. 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/CZA301100010.
Missa omnium sanctorum, ZWV 21: Gloria. Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe7529e7637b96299b407eb3d0a946d87e6af07741422aab2bbcc124e80b81b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA301100004.
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
Missa omnium sanctorum, ZWV 21: Gloria. Quoniam tu solus sanctus II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c971becb985b47f078467f1e595c6e1cecc5b1b4d87c9aae982e6795e30352. 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/CZA301100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b909b00cbe89b8dcd665c4c35d0ee8936f5a7624b5c9dfbb0fccfd30b4e87b. 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/CZA301100016.
Barbara dira effera!, ZWV 164: Barbara dira effera herbreae gentis rabies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9d9b3c1c146e3c73ff395943b1cc93e45a91173b7ffe5a233cdd73df7084c8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CZA301100017.