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 0xcd8e5cfe608507e55be7f88cb37c7bb879745c6543fcddd58fa406c89bc548b8. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72b7f1fb-25cf-4caf-8d4b-31eb50c077e1.json and https://artists.proofprofile.net/proofs/artist/72b7f1fb-25cf-4caf-8d4b-31eb50c077e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Memories of Leblanc: A collection of "Persona" arrangements (2021)
Bonus Track & Excerpts from "Triple Seven: Seven FFVII Arrangements for Seven Cellos"
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 0x1957ca1898a9626988ca60a95a8c5b72758c2679de80d485172527d4129741ff. 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/QZNWZ2464773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd9c17d1fbcbe5e9325b821f2803cf76297e1958e548745269eac86334ff925. 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/QZNWZ2464774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fa24186efafe755f8aadb85d9e3cfbdfc3033a2860404a6d0c6d8b07914ef5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWZ2464775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50a82ed84f244d9e29f5a1b5827cf2c5399497b919c277f9899b08b99df7427. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZNWZ2464776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876fc4d5551c207538128e215aff07aa6c15c3d500d2813b0b904245aa986fd0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNWZ2464777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2f6b3587d4af1a323e6311b07b85f664519df3f1abe4cc5d09bd653100de8a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWZ2464778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc97a023e0f94d9e5dd3ddb52a80f3bf4939ea0bc011148118eba9d4b8a4dd4. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWZ2464779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fda8450c125abff7d7e9f41f17a2aac51e764ecde664e09b2a40833a0beeb8b. 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/QZNWZ2464780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4edf79da8947b8e1bbb06d11864f697e0f4f3d296b8121c619ef00d3bc541c. 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/QZNWZ2464781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd60374bca18b22fc5e3f3a93f7e75ee8e722826ebb1822f72583fe419223236. 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/QZNWZ2464782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6c982a279a0ebf5edb1625db2c68fba6e9fc7226f60a37e26b5505049b7fdf. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZNWZ2464783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd09bf6cca81f2166ee1850576d113a19b2de8583dc8c387a75aa48105a9d49. 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/QZNWZ2464784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c425d21e05370272607d9bc8fd493c14b648c2a0d8f8cec2c824966870579dd. 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/QZNWZ2464785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce49810cab8f3c64a4f548831cb9057ee3e3a7c03602eaf64eb43cfe93eacdb6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZNWZ2464786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e9b6a2b5a066a2fbf4bf1fbe05328676d8923072df0b804157ef99420bc42. 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/QZNWZ2464787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8312aecd559b0005e06dc2f884df552b5cd0fcd4d74fcc4c5177232ea7a88f16. 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/QZNWZ2464788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b9e5c2d55ab3843bbf0b1511a504fd08de54e0f9bd966ff9629dbb8027c8f8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNWZ2464789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dfc4ee54121e48a6d9480f8fcd20a758aa184251adc5af6b8f9fca0c11e336. 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/QZNWZ2464790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3c9b8f226f622238bd5eb605795bfe4dccea4ace135302fff173c1cc93dd2d. 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/QZNWZ2464791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa16bb91e018dabba37dcf4b55a49fde4911da32a9cdbe4f8213f95a2f9051e. 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/QZNWZ2464792.