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 0x6ebae6d78cc0ae8210de389dc8abe0af176bd1f7ea77959e8d5a33b222befedd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f56e98d-b77d-4adb-b8b9-6c7e5e467032.json and https://artists.proofprofile.net/proofs/artist/3f56e98d-b77d-4adb-b8b9-6c7e5e467032.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
6 Romanze senza parole: No. 6. Lentamente a modo di Canzone
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 0xef3612b35b93bc9644310edc33dfe440317b50afed989ffce8f25cdf5feb694d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI192348106.
6 Fogli d'Album, Op. 13: No. 2, Ruscelletto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2cab5a889199c59d91c5c2197b40e3bea6d47ec3f270f7ae0a6f67287e5d70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI192348117.
Opera & Song Transcriptions for Solo Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928756824334ad083c0d8437759941eb49a564fbf556d20c0260c20aaa668ed3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI191001401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199c7bbe5256e9385587b3ffb12edaf8328290d09965fa14ede8db48620b79c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI191001501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cbfea6b26b027f2bce956e53f10c35c81d3c55cc7b98c4cb8989869439ea98. 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/HKI191001402.
3 Esquisses musicales: No. 1. Ronde turque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d6562335c322b0d396cc0934ed949e7a816a058fe5cf6b9728f5a4fb489fc. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/HKI191001403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db433106b489a052b767ae1a06abf0d176903554513af1639d4099fa30d4a76. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKI191001404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4189c1ad3eab60562a4baeea7962daafe17d9846b76f17352314a3767d60b32f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI191001405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7123c0696bdbc409f14bd99dcf839aab6474aadfd87b37bb18071a818d9f72. 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/HKI191001505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eecab3d03c8bf65b655b132a04a6be217d2cfcebe9c31d513d99cc4502fb09. 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/HKI191001406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9616df8d55f6698fe82f82274b048d4644c3abefe61d6958bcf9e3b7a157c29e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI191001506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727c7af3c7d89d02fbd0697b53b4a09bdf63b2452cc069395110e76180bf8e5f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI191001407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dce471d6fb8552cf476301a723f79dce575f628dce67b2a6b061ce851dde62. 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/HKI191001408.
Magasin des familles: II. Romance sans paroles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cde825f7763bfc25cd9c9f3529a63d139af138cb9743f122a0aaab0893a64d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKI191001508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ade91b802d093d84bf040fee68faf99c79bf1d377e5bf89b25d7467b15520b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI191001409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d26aec8d3f6c71e8bd35a0ac9d802118d2ce7d1db7fc69d15ccff495a1df0ae. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/HKI191001410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25eba9c800e8999544ca2270e32502c807b1c1fd675d4fc3fea7f9ecfc1f19f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HKI191001415.
L'arlesienne Suite No. 1 (arr. for piano): I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47e24b28a6e0e4dacf5ab9333d73f84df47e45213b6f772e3865671958d7a38. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI191001416.