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 0x57f27757b58143bb4f6b4f8dcf1f365224d287cbe9706b34fc797be0107711c9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82f3351b-21f1-42c5-85fc-6f5a6f7c8bb4.json and https://artists.proofprofile.net/proofs/artist/82f3351b-21f1-42c5-85fc-6f5a6f7c8bb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fernando Sor: Classical Guitar Solos Op. 6, 9, 22, 29 and 35
Love Theme (From "Cinema Paradiso") [Arr. for Guitar]
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 0xe1b0a617121f70ef55b5adf60e2a5d364f62d63ba16c10b9f1ed06cf56bd50ae. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SIA0U1800003.
Buongiorno Principessa (From "Life Is Beautiful") [Arr. for Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16000300108071cb54d66a4760ceeee54e7b80a60f16e7ad560d04587da27485. 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/SIA0U1800005.
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe096091a27ef4367b9c303b67c3047ccec2dd1a47b43ef743f7eb14e906436a0. 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/SIA0U1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cfda4a732ffd119e8eb2d47e76a45217259d8f7c52f08865a938a42fe511ff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SIA0U1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a931d324012c80421b4e8b1a65346fff1a22ba5acf97c527a1af2b16fcc75. 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/SIA0U1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68ebba777ce23a770d5fca56994c9981b3136b01315d499dce13cbbf6ffa3cc. 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/SIA0U1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c2fcce46b975a5f5872db058e73e625f79a395b480da5f12007b14e42d5b7f. 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/SIA0U1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37aca78c1801c72149bd471312476eabaee9cb103d46d745455ff3f46a13aa5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SIA0U1800015.
Nearer, My God, To Thee (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5f3157850b534ade1088e5467ac28a488ed9822f5d4640638c62d4f3ae8e7. 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/SIA0U1800018.
Gabriel's Oboe (From "The Mission") [Arr. for Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2740874f7b477d1c9b0dbe733d6546996eeead15f4b59c8555566af18fc52572. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/SIA0U1800001.
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
Playing Love (From "The Legend of 1900") [Arr. for Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c76feb7abded23ce513a36715ea1d88772b3b690049aa97b59fb9916a0519c. 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/SIA0U1800002.
First Youth (From "Cinema Paradiso") [Arr. for Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e3d8af4c9b49445ba01ea3acf80336ed323f002309b06b0337c85073ec6588. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/SIA0U1800004.
La Vita È Bella (From "Life Is Beautiful") [Arr. for Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7c3937b5ab6d77c723c7458f3d4c2b7892b0db180eea7e2525c3cdfcfa882. 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/SIA0U1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a621b3273365b9cbf2cdf2923bf0c96e6fe1c65ebf2e48b803256cfdd559912. 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/SIA0U1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b31c5774a3c8993a18ce990fbe54290c01688d97276482d00aca4577cfdd139. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SIA0U1800017.