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 0xbf203f5c614bc0be78e21363a53746879d9004f1ebb57ebfbb7e178f95ce42b9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6df307d1-7853-45ad-8b67-460e8ad0785e.json and https://artists.proofprofile.net/proofs/artist/6df307d1-7853-45ad-8b67-460e8ad0785e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thomas Quasthoff in Verbier (Vol. I / Live)
Erlkönig, Op. 1, D. 328 (Orch. Reger) - Live
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 0x2b9c02f55a5eab3d0da260c66d98ac591614713a62ec2cef5d8b4c51fdb41f6d. 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/DEN962236505.
Piano Concerto No. 1 in G Minor, Op. 25: I. Molto allegro con fuoco - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98533cf404a346ca69554887131b0044ab56326e0eac3e0ce8aa58197ba8d60. 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/DEN960902821.
Piano Concerto No. 1 in G Minor, Op. 41: II. Andante - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc6e571a66a8512bf6048d8c87e6f42fe72d90be83910f177e0918658c1961. 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/DEN960902822.
Piano Concerto No. 1 in G Minor, Op. 57: III. Presto – Molto allegro e vivace - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ca0902139fa706f2304357b4e1802dde244727829eec79d68a9646eb19ca0f. 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/DEN960902823.
Piano Sextet in D Major, Op. 110: II. Adagio - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2adc76780de940301108f0ea73f843400a52007e31f2c84f201241a7d4823e. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEN962200312.
Piano Sextet in D Major, Op. 110: I. Allegro vivace - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf331d495d83f1f9beb9520366bc4e9bc49d9fc32709e88eb7b17ff0c5f4cd389. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:15:45Z), 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/DEN962200311.
Piano Sextet in D Major, Op. 110: III. Minuetto. Agitato - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dda61bde13ad25181e0eed95ee6fbe8d9e35bed18b19fbd2bd80d0033af8f5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEN962200313.
Piano Sextet in D Major, Op. 110: IV. Allegro vivace - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e35b70f13c1df4664e6e7bfa9fc9c2d4cc21a6cc3f9d7adab4fb45f2ddb34ee. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEN962200314.
Mendelssohn: Piano Sextet in D Major, Op. 110, MWV Q16: IV. Allegro vivace (Live)