thumb|Jean-Philippe RameauLes Boréades is the final opera composed by Jean-Philippe Rameau (1683–1764). The work takes the form of a tragédie lyrique in five acts. The libretto, attributed to Louis de
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 0x1579f70c17eee075c4f578bc3c232f6b78f808e49ff642983bbca2553fc87634. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e22d0182-d6ca-46e1-8507-2bf1edce7d62.json and https://artists.proofprofile.net/proofs/artist/e22d0182-d6ca-46e1-8507-2bf1edce7d62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Théâtre musical: Vivaldi, Rebel, Handel, Schmelzer
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 0xb2b3e3124101c2f75b5a05d6ca463814b7c6a238b2032123d244ed2afe315019. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/CAJ720021801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a7c42a10bed4140c2c57b7748af231d125848f20e1a21b12f9ecb82fe911d0. 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/CAJ720021802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8121e2a3c64ca9e1c46c57b16267202ac8ef3da4d10bbbd53807ce24102e7b. 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/CAJ720021803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26daf8c016138f2f269253701e53e9eef46fa59d6cbc5729674d4c4b756032e6. 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/CAJ720021804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4ff1e1db3c249e9191e948f3f86a07c2dc5aaa18efee72dbb759707db0c756. 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/CAJ720021805.
The Fool On the Hill (Arr. by Eric Milnes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506ce701a8ba88c3a19a5c78f249a0b8bf172c7063b73420d5468a19daf0898f. 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/CAJ720021806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e30050568829d2208f5311ff065a83a054fa91aa3824cbafc0104c30791c94. 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/CAJ720021807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0596448a1ee655e25cf7f97bdab2d00278eee05b4096dd2be6eb22a72c8758d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CAJ720021808.
She's Leaving Home (Arr. by Eric Milnes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaf7a2012d5cd33b642aed3baa36fcc9cadca1a79d4776354c3d3486b3a9939. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAJ720021809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046c4dd54c35d08384dc90fe76dbbb40a496c6467e487d992a87b3d8213ff42b. 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/CAJ720021810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c9c1039a5a46d944b73e9b0f95cd02e935e7b6f1e4f3877773a0b7a7d10eaf. 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/CAJ720021811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b68138871ef22b528596386d0802f9b1252449c1ca47aba711e6d3f9a1fe582. 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/CAJ720021812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23f750841dfa1eab3c926bd221fb68b013eb382c062b75f70d84422b649317. 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/CAJ720021813.
Mother Nature's Son (Arr. by Eric Milnes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf33612f79107a8c66d0f994af467333d9da416528d9a5ca7f485fee80a35d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CAJ720021814.
Lucy in the Sky with Diamonds (Arr. by Eric Milnes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec2d9c2c0ff9a3d4b902ef3999d41081e384cc405f5cf14b94e263b2798767. 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/CAJ720021815.