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 0x18363a64177cd9c83ee741808caeb9a84b910695c97a532b4aca7a59d2e2d06e. 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/c622c495-aaab-4529-9c8d-64974bfa36db.json and https://artists.proofprofile.net/proofs/artist/c622c495-aaab-4529-9c8d-64974bfa36db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Palestrina, G.P.: Missa Sine Nomine / Nanino, G.: Lamentationes
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 0x758625e4f47f5d6664fc2fa1603df9e6b670dc3a58aa4a507e7234d4bdfd34b7. 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/DEB261000441.
Ad te levavi (Introitus, First Sunday in Advent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e22bdd50b1772fd9a802d378fde41ccd3d80293b1a64fa3cfb289d69195106. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB261000442.
Gaudens gaudebo (Introitus, Hochfest der ohne Erbsunde empfangenen Jungfrau und Gottesmutter Maria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651214f85e8e134c71673f4e265cd8806cc9f4b9b808cad55955ea2ef1d9905. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB261000443.
Benedicta es tu (Graduale, Hochfest der ohne Erbsunde empfangenen Jungfrau und Gottesmutter Maria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ed1daa2811b5a57a7eab739a7af04a82af4b49a4861f70800b034e1780c365. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB261000444.
Tota pulchra es (Halleluja, Hochfest der ohne Erbsunde empfangenen Jungfrau und Gottesmutter Maria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f5f4ceb246123be808a594e13a74fdaaf6859d0607fc04caf8fb1e1ca00c3d. 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/DEB261000445.
Ave Maria (Offertorium, Hochfest der ohne Erbsunde empfangenen Jungfrau und Gottesmutter Maria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16692c1c1de2e2906c8b6d65493fd7fce68b9d273b06c27bab132a7455cc23. 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/DEB261000446.
Gloriosa dicta sunt (Communio, Hochfest der ohne Erbsunde empfangenen Jungfrau und Gottesmutter Maria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e9497d0275aee1f29dfe98563502371f509e11cc20563a486d1384dca1166a. 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/DEB261000447.
Alma redemptoris Mater (Marianischer Antiphon im Advent, Hochfest der ohne Erbsunde empfangenen Jungfrau und Gottesmutter Maria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b20021636e2872c0aba0c2f3d2b96027bbcd6406d90af26a0638e0a4988cbbc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB261000448.
Populus Sion (Introitus, Second Sunday in Advent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5db7b3f0a018457466af40845049216f168f476dba6913918d3c331287ff34d. 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/DEB261000449.
Laetatus sum (Halleluja, Second Sunday in Advent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fd91b8d671487b445c046a05b96019edd4dc35a5ad12f6940d91ecce614666. 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/DEB261000450.
Jeruslam surge (Communio, Second Sunday in Advent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d212ca0177385d24bc527bc883290ea7447cc7307fe82c2c1a845e14784196. 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/DEB261000451.
Gaudete (Introitus, Third Sunday in Advent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fafa0ab5689fc2dd243dfb101b597fb0db940f682d77bb211775d03f654cfdb. 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/DEB261000452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867e1e49a9aea1704d22ca997689b3477eb8f66bdaf954ab23aa05c2b2ea9c4b. 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/DEB261000453.