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 0x9a8733bf9859fb273af7c04a786329179530f6c897baf96015f83654aaa4545e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db4c3204-d8ab-435d-aba3-24a25eca97c3.json and https://artists.proofprofile.net/proofs/artist/db4c3204-d8ab-435d-aba3-24a25eca97c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Suite, Op. 1 No. 18 in G Minor: IV. Giga
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 0x397e760ea5ac46b981aa9f55c762ce19eb5197cfad2fc1dbafbb242fbe431f0c. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/AUFFF1800065.
Divertimento in D Major, Hob. XVI:4: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3def41fe03c147e8492b0462d3ebc75997cd1f30eefc50c3af9e009354593a9. 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/AUFFF1800068.
Ausführliche theoretisch-practische Anweisung zum Piano-forte Spiel: No. 53 in B-Flat Major, Alla Polacca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c3a2957fa4cf9f3c9dd14b62c79a3f38b262ae2a623ab748373b51c9295b1. 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/AUFFF1800069.
Album des enfants, Op. 123: No. 10 in A Minor, Tarentelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd48670fc8a861799e3ca72443b75cec43213e2161e0c60f8c04d67627b8dd35. 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/AUFFF1800070.
Lose Blätter, Op. 147: No. 2 in A Minor, Lose Blätter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc74a48ac183759e10ad38270d1ad20364233666f2fa077dfa25f45278c4265. 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/AUFFF1800073.
Music for Children, Op. 65: No. 8, La pluie et l’arc-en-ciel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e98dfacc07b61a4551750754fc5d7dcfa74dc0ee663b3c3b989ae436ab36aa1. 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/AUFFF1800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c353ea476d329321d03eaba0dda7b59673d320b8716d6b383fea1d4614f285. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/AUFFF1800077.
15 Inventions, No. 14 in B-Flat Major, BWV 785
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff74748b7352f4d7a6cb3b3fe96016d19f652276628f4d4f21a843fd1151fd7. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/AUFFF1800062.
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
18 Characteristic Studies, Op. 109: No. 1, Confidence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a6f86a2e6813cd25498c03fd055d14ba9ccbd0ea903ebbb400cb855b69298b. 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/AUFFF1800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222cb2dbf26fe173698904e5e30bfa8e9f47779bd554ee1d0385c27984f5e970. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/AUFFF1800064.
Seven Bagatelles, Op. 33: No. 3 in F Major, Bagatelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b420f8643a3126e4dad135c6b5cc8c564dd375b207377431908d7ed3f08ea. 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/AUFFF1800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756d29bf9c9fa0ad6735ff5439fe3edd89d49f0e65acd6cf789e009c31a0b00b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUFFF1800067.
Huit pièces faciles, Op. 43: No. 6 in G Major, Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8eca87b13df8d0085b1db246559462e9db6a30757c5d41507ea9bf7974520d. 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/AUFFF1800071.
Ländler und Walzer, Op. 97: No. 7 in F Major, Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4b7a1fd98cda53f2bc967b3b911944f6fabddbb318daeb2a33ffd4698ea203. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/AUFFF1800072.
Mikrokosmos, Sz. 107, Volume V: No. 139, Merry Andrew
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a316d85ec7bfdd5e960566f02418086df0e9154eb9f46a9a56728974b28e65. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/AUFFF1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a18b5e5fd0083c0bae2e9421d0fb7cf511e38879975a512a4a157dbf8e463a. 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/AUFFF1800075.
Keyboard Sonata in C Minor, Op. 1 No. 2: I. Fièrement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e0f9960851df7df2b21d8e84c15ad58d32fde92aca7cde309ecde0567acb5. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/AUFFF1800117.
Keyboard Sonata in G Minor, Op. 7 No. 3: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b591b96abcd5dc87e00951b8e71edd5f647a7cee32e34cc06f811e79ae86e5. 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/AUFFF1800114.
Keyboard Sonata in E Major, Hob. XVI:22: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338daa35d6b3b4b8368eb9277f35e55417f687f3d4bd152e6f1be3d8050ec02f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUFFF1800115.
Keyboard Sonata in B-Flat Major, Op. 30 No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee51f8e65559e850c8be1b1367c1c7ef78ce8b64804f9116699e29a2180c2d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUFFF1800116.