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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a9948f7555387fff5bbf6ea0044ee92a76d814334b8134cdbcd5f5026a573. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f252ec4-1955-4f8b-b761-6fcb2fd694c8.json and https://artists.proofprofile.net/proofs/artist/0f252ec4-1955-4f8b-b761-6fcb2fd694c8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Der Rosenkavalier, Op. 59, TrV 227: Introduction
R. Strauss: Der Rosenkavalier (The Knight of the Rose), Op. 59, TrV 227
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303c1c470c22970c48c014eed4f272d34dd9145f0ab9c32c9b1bc9ff93156418. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEB950858101.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: Wie du warst! Wie du bist! (Octavian, Marschallin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adf0d3051d32103cf7c6d8a83a8cf87a58adf13fdf3b80ff7931fec2703a329. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEB950858102.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: Du bist mein Bub, Du Bist mein Schatz! (Marschallin, Octavian)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75c70fe76c0ba57c499a9725ee5ffe9459fe64a27ed1430abf7ee23c6fade0a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB950858103.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: Der Feldmarschall sitzt im krowatischen Wald (Octavian, Marschallin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c158ed464b822da01ff0d3130c11ecfe3246469b2f4bafbd7a9452bb99cf541. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB950858104.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: Quinquin, es ist mein Mann! (Marschallin, Octavian, Marschallin's Majordomo, Baron)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e45faed3b81981a67c76865879e3670289a645de2165f727c3218552c6335. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEB950858105.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: Macht das einen lahmen Esel aus mir? (Baron, Marschallin, Octavian)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75ce5e6de1e863d3a1115d481a72d6dab9255177d7195f525b4fb453ae2bf9d. 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/DEB950858108.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: I komm' glei! (Octavian, Orphans, Milliner, Animal Vendor, Marschallin, Valzacchi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25937a14d043895dbf18e51d7ff6e39f2d5a9056f3f69cd6b2797cf5b1951326. 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/DEB950858111.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: Die swarze Seitung! (Valzacchi, Marschallin, Waisen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e46fab3bcbd8926455ffdc76deede0568e38ddc55535dc0bb6851c14c9b13. 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/DEB950858112.
Der Rosenkavalier, Op. 59, TrV 227, Act I: Act I: Di rigori armato il seno (Singer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3f094598127def79ba1dbcce8b6b08e983d385c04e89886ddfb4990a65f173. 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/DEB950858113.