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 0xc6a15a531eab43885674223f9cd6b51e0e42a7db395576e12fc1d958d2581253. Chain 2 (Bitcoin): anchored in block 953924 (2026-06-16T09:52:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cfe56c4-e602-4ee8-bdbc-7715398ae67b.json and https://artists.proofprofile.net/proofs/artist/1cfe56c4-e602-4ee8-bdbc-7715398ae67b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven Chor des VEB Elektromaschinenbau
Orchester der Hochschule für Musik "Carl Maria von Weber" Dresden
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 0x481b6862361fc2023d14c7fd66d58c270b66730e453453f847df9b4304232399. 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/DES380011294.
Axion esti: II. Passion - Mit dem Lüster der Sterne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415c8a0525e750dad3148985206e56e20d1020bf6160388b233e4814df99b740. 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/DES380011299.
Axion esti: II. Passion - Purpurn färbte mich das Blut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb955e01260511f9cc9afbd9058e396b449d7253fd3940bda091a5b32d5e5a5. 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/DES380011303.
Axion esti: II. Passion - Kirchen, gestickt ins Lichtmuster des runden Himmelsdoms
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cb82289e127f69370da391bfbcd0684e5fa3cc42e5bc4867525443580b6df4. 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/DES380011304.
Axion esti: II. Passion - Nur diese eine Schwalbe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe77bc430f6d74512097320ae433e8e4656f620564afe7f08dd9b185295b9e34. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DES380011297.
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
Axion esti: II. Passion - Höre, reine Sonne der Gerechtigkeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd1dea128917752da10e8760a88ecfb211f4881dffbfbb7e581ab8eeecd3848. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DES380011301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42c3a3a00773f57661df78fc611bbfdf87813e05b4b354d1f665439a9f0c69c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DES380011302.
Axion esti: II. Passion - Ich öffne den Mund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd413e34bb483c6077beaabdae45e0a2a8ad82198c89e60c2f8ffca657ef6f545. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DES380011306.