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 0xd2815715130a2540a47bb5a6b6cf774afad41d60dd9009c49c88175a7d4076d9. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53261260-1766-4fa0-858f-0b45f13879c2.json and https://artists.proofprofile.net/proofs/artist/53261260-1766-4fa0-858f-0b45f13879c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
4 Notturnos, Op. 22: I. Wär's dunkel, ich läge im Walde
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 0xced55e9f97418754db2c89ac7cb7571e0e19eebcdfcfa28f4864d21e55e98f76. 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/DEB112000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de908b5042f73be178aa253dbd87d466cf0e47c0afcb40099107f1a958c7eb1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEB112000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844b69e793d8cccf6254e17050d0fe53760e577f163445124938cc3c5c745e07. 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/DEB112000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2084618b23180ca6b3a3725dae275c0bc82be65d5f2c2359763eb988f7354602. 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/DEB112000115.
4 Nocturnes, Op. 22: No. 1, Wär's dunkel, ich läge im Walde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de908b5042f73be178aa253dbd87d466cf0e47c0afcb40099107f1a958c7eb1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB112000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844b69e793d8cccf6254e17050d0fe53760e577f163445124938cc3c5c745e07. 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/DEB112000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2084618b23180ca6b3a3725dae275c0bc82be65d5f2c2359763eb988f7354602. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB112000115.
Lili Boulanger: Hymne au Soleil. Chorwerke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f7baf001ea3f8d474eada384773989f864f8a0960c8099477bf159ef6f7831. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB111801501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8337509264c9933790017a320b8a2380e829e8dd9cd9e6a2efff314b502ad2c8. 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/DEB111801502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf531bef62392f00cf690796a8ed8848832ece80adf6e3a2013b0dd24e0663139. 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/DEB111801503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5b2c0f661d8809999565a5732598dd72920216b3632afa611ce5385c7d7ea4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEB111801504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5751c2397f3c07261f594b7e0981b0d1fbe34ccf0d66c1a1772b2ec5a0b9ac8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB111801505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca2d364b87377ef094a6cb69643382f2d1b2dc75c25fd99ec87f71b81c4f31e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB111801507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdeaff9820b1e63b75ca9951dca39653260c983c4005299eb0058fd9e992327. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEB111801508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df9003fb8e9f5d39128f36194b2709136a07278b1632b6fc84fed7759910754. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEB111801509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad481e1f037c9ca9ea27a137717f39da64479f95f4421604dba1d291c6eff9f. 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/DEB111801511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46e4e6de6f5bef74dc1099c2b0872d39f2a4aa7783350e77cf5e361ad1bdce7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB111801515.
Touched by the Strings. Chorwerke mit Solovioline
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410afc60278c3ee6931d449194df18e7524843277998c7b33c75be31447648bd. 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/DEB111302908.
Robert Schumann: An die Sterne (Carus Classics)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d9e34aa3516a91979bf5ecfade6b917cd59843dc03827515e4cac6ed109f10. 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/DEB111302005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca8da2248a5611c33ef781c648a8096668c1cae94388ae43194a82b38748e49. 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/DEB111302021.
Lighten mine eyes – Contemporary Choral Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b22ce7432eab3a5e33dcf0df309483f78f5b0052a29811f38365e734e742d. 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/DEB111000702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69be6bc0ebdd210b108d91fea31d613e89032f9ec78e8d19645bbfc3105d14b. 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/DEB111000704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef24531c3a2a0a6539e603af774fbaa0a5be9d2dff654ce334c25ed75f9dfe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111000712.
Robert Schumann: An die Sterne (Weltliche Chormusik)
Haydn: Die Jahreszeiten, Hob. XXI:3 / Der Frühling: No. 2, Komm, holder Lenz!