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 0x952746af8d8890828b21c792ba696ef71a0797a94e04fce0d879b700da929b65. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1c9efb7-8dd1-4fb4-8c4a-b7f14500a97c.json and https://artists.proofprofile.net/proofs/artist/f1c9efb7-8dd1-4fb4-8c4a-b7f14500a97c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Nutcracker, Act II: Dance of Sugar Plum Fairy
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 0x2951012faf8fa25c2a8106083adcb0c6f371e6e2af66b38973b949d85727a417. 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/HKI199339803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa4ab947774e576e0c9a365d930da1b93243cfabf5a12e2508a4cf1b94599e. 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/NLY332202325.
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto
Adagios (The Most Relaxing Classical Music of J.S. Bach, Mozart, Beethoven, Brahms and Schubert)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a125ceeed7cdc9d31cbb00773a0faf7d52e7d3c13ae66b35f4ec734066be3f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/NLY331405132.
Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8331d242b38589c684ad0ff82b191669e0f297997ace4080aeb700c1706e4d38. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/NLY330601414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8393a7720dcc30c194d2cdf8eb927c2402a34015c0010d16232a9bcbb913de9d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLY330601416.
Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato (1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eccac521ac63b7ce3402ea9a703ca5146c16e08dc4825e191776352f5272c7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLY332003408.
Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfbf137e2b652bbcb14802df495cd5008c9fa966272639a6b4abd9ca639b520. 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/NLY332003409.
Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato (3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a7f2b1299aaed9c3b5ec7498c152c2b97b563aa86afa135f7dfe9609fb2b4e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLY332003410.
Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato (4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dfa1a8e724ce5cb5cf9d7f08474d5d008288cb4e42c001a7af14d64c7e4260. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLY332003411.
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto (1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c55a28497ff5840c8cbc4c4fd37af8e9ffd451d14129de19ccc69e43c55a1d6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLY332003412.
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc41bf29b17486d5c128980cfd1c087cc0d7306f1fdcf3f5c52f858076f958a. 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/NLY332003413.
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto (3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f40a00d8fc4f0f868ca118be98360267bf2403da42935f543c3f9dc5498345d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLY332003414.
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto (4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b445969bd40b81b3c613ee826d252dc871ca5e827335e8165a9ce59b3d2535d. 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/NLY332003415.
Piano Concerto No. 2 in C Minor, Op. 18: III. Allegro scherzando (1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f79c191c5664adcc26c11a3378f05d39db85ef1ba1e4f87cbf2ce8eee14a8df. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLY332003416.