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 0xc737a5a2fb8805010eb32efeb2f04fa7d94533b83733e51677338032a6f0b725. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55562a85-4542-4636-8645-c3c31da05315.json and https://artists.proofprofile.net/proofs/artist/55562a85-4542-4636-8645-c3c31da05315.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part I: Accompagnato. Hence vain deluding joys (Il Penseroso)
Handel: L'Allegro, il Penseroso ed il Moderato
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 0x583d2e0386e76f6191aa2a1b073e6648a2b1899a592ba7cd8f460d3a5cd1f1cc. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2335020 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part I: Air. Come rather, goddess sage and holy (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb949db7f1aa8958d2f2d5cf6e9257ca122fc9690cd994379b1cd0e570b9c9969. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2335040 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part I: Accompagnato. Come, pensive nun, devout and pure (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04032af00c439099272cac2aeff28be34cace875baf100497b4d9bb04b7e685a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2335070 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part I: Arioso. Come, but keep thy wonted state (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f1de03e163199ec42f808d1fa6bd01ac7132b75f9444aa83aa484d6eaa9af. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2335080 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part I: Accompagnato. First, and chief, on golden wing (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03f97f7678748a00ac085ce7093f7c5f017d8927db731e1bd0ec550c153855. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2335120 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part I: Air. Sweet bird, that shun'st the noise of folly (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98807cade4fef24c0928b897d124f8abcd3f9ae03481f5ecb1b7a2963cb6547. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2335130 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part I: Air. Oft, on a plat of rising ground (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cff94be103379b025ad1a32b3d6be08d155a447a120d031efec195393a3f9b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2335160 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part II: Accompagnato. Hence, vain deluding joys (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bdbb3b84cb85fab1acc458791372b33c38e97c209ff12a86e94281caa30e52. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2336010 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part II: Air. But oh, sad virgin (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaec1da68185d59c16d2cf285def4873c029d0e0580fe6ec9401945f76d927f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2336020 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part II: Accompagnato. Me, when the sun begins to fling (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c2fa88baf7c56095dd6b1f25eb6502ab8da7f393797770b9da8c79705264f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2336060 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part II: Air. Hide me from day's garish eye (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fdbfcbb1978cf59a0d3069f13ae6e771351b1ebbf763d88887244030f3f451. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2336070 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part II: Solo and Chorus. These pleasures, Melancholy, give (Il Penseroso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0b4e867f9c5dc96b31778135d9848eee6f01537d516ef256b1b04dfc0a982. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2336140 — a six-check JSON result.
L'Allegro, il Penseroso ed il Moderato, HWV 55, Part III: Duet. As steals the morn upon the night (Il Moderato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352f6a0458be0e82307944e2206704b2648e9ac8234ea75a03c63b5657f4f9be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2336210 — a six-check JSON result.
Romulus and Hersilia: Where are thou, God of Dreams!
A Fancy: Fantasy on English Airs & Tunes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf4909dcbf3f3b52a6aa4c808ce0b110720cb5d513ee5ac83386bbaa6c2b5e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1670030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6003b845e8efddf75bd2e73f66732ee7f3a49a129a59534285b2909ff1892. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1670050 — a six-check JSON result.