thumb|Mary J. Blige & Markus Klinko Markus Klinko is an international fashion/celebrity photographer. and director, Klinko has photographed Beyoncé, Lady Gaga, David Bowie, Jennifer Lopez, Britney S
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 0x5f4e1f3607eea05811c2fdadcb22b1ffe2de9f14e0f7eac28c9e1b27d6198c2f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/686461c0-2792-4851-8eb3-abd396b84d8a.json and https://artists.proofprofile.net/proofs/artist/686461c0-2792-4851-8eb3-abd396b84d8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musique française pour harpe: Satie, Debussy, Saint-Saëns, Fauré...
Debussy: 2 Arabesques, CD 74, L. 66: No. 1, Andantino con moto (Transcr. Renié for Harp)
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 0x5a1716154b01840cf1bca247fe74625a335bf654c49070e963e7469a550fd19c. 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/FRZ119209270.
Debussy: Suite bergamasque, CD 82, L. 75: III. Clair de lune (Transcr. Klinko for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b78b8a4b6052cc71fbb58ce9204169db5e9eef99c5e370a07d2f326aaa775f7. 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/FRZ119209280.
Satie: 3 Gymnopédies: No. 1, Lent et douloureux (Transcr. Klinko for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8812b96861d95d1b67a1c2a67066bf6848b693f5ed2c86fe951655a39d3cea25. 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/FRZ119209300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a9b0d7580cf031df5315d12df8c97c8daffc65abd92d3e75dabfd8b9c27de. 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/FRZ119209320.
Fauré: Une châteleine en sa tour, Op. 110
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364d1add01978d119d770c15da563a46fc9c1b07f22dbb95a49abce708b4b6a0. 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/FRZ119209330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a50939781f7d697e9ea697e5fa0ab2919e9773e058f641b89ad9012d5a06108. 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/FRZ119209340.
Saint-Saëns: Fantaisie pour harpe, Op. 95
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fd6b107d7db6c99938f70892ccbe240c10acd4b2cdd945f1541496eaee9575. 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/FRZ119209380.
Debussy: Préludes, Livre I, CD 125, L. 117: No. 8, La fille aux cheveux de lin (Transcr. Grandjany for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff5e7009cf394b056a2b5cbb7df4c8d7b7fae38ea10dfe0b4e153798a999d0b. 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/FRZ119209290.
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
Satie: 3 Gymnopédies: No. 3, Lent et grave (Transcr. Klinko for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a7957a7d5e590a9c0c079a6fadba723c2d612c24f97754436886a6dbccaedb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRZ119209310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06159c41f0b0e8c75ec22c70b1b5dd1aea2dabc12cb09924c5143299ffb03b23. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ119209350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640ae708e9f55694a020be7eb374994f0200382de9450a0414805582e71852f1. 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/FRZ119209360.
Ibert: 6 Pièces pour harpe: No. 2, Scherzetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44948f79ebc6556ba5a251a9a97f6fb6a1d44c1855c88ba40d36da163a50041. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ119209370.
Musique de chambre française pour harpe: Debussy, Ravel, Satie, Fauré & Ibert
Ravel: Introduction et allegro pour flûte, clarinette, harpe et quatuor à cordes, M. 46
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c65bc2992d02f5517e02f70849c633ea948701854c958c5d0b63ba2ba38afb. 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/FRZ119301520.
Debussy: Danses pour harpe et cordes, CD 113, L. 103: No. 2, Danse profane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e04c4896e523ad65686ec6eb5779f9e5d8b4b1a04380b9f81cf5e973c0cc068. 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/FRZ119301540.
Ravel: Pavane pour une infante défunte, M. 19 (Arr. Maganini for Flute and Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5999a72b24979df1f7f83365d043c7c0d13cf67a50474f9d0c5d29310ae75ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ119301580.
Debussy: Sonata for Flute, Viola and Harp, CD 145, L. 137: II. Interlude. Tempo di minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2c4ed8156f3405d44eb42d2938eeeef5487e8b45e47724fb78dc0313932a9a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRZ119301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4faa3a4cc6c8be4e5514697b3b2c03699717a25aa81c6c1d6d637c6d30ea28. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRZ119301570.