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 0x92e5a06893531131e7752e849403e1dcbce82d185f12717a7cb84040969f408d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d76019b-36e0-473b-ad1e-3ed422a34223.json and https://artists.proofprofile.net/proofs/artist/7d76019b-36e0-473b-ad1e-3ed422a34223.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le Sud (Acoustic Version - Reworks 2024)
Le Sud - Acoustic Version by Guts & Florian Pellissier feat. Caetano Malta
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 0x008379fbc06a62008c580da1a892a0a137a2e07187555d232e6d65cc2457d3dd. 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/FRZLH2480005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff52243d38d110b6146cf18cd0fca91649ff8eb6655ea48814718c38d5b39d6d. 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/FRZLH7480010.
Le Sud (Soul Jazz Version - Reworks 2024)
Le Sud - Soul Jazz Version by Guts & Florian Pellissier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4207bd83d86781a8281454753cd4d539efc7782196dda47311734b569d4f0b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZLH2480002.
South - Soul Jazz Version by Guts & Florian Pellissier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb32c947e636e7fce237348ad2a03f098bc0ccdf2dfc88bc2799734d9147b36. 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/FRZLH2480003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff52243d38d110b6146cf18cd0fca91649ff8eb6655ea48814718c38d5b39d6d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FRZLH7480010.
Day In Day Out (Florian Pellissier Extended Version)
Day In Day Out - Florian Pellissier Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad362ed5cce2a2fc00e2882581dbd2c76d78e449e0c73048cf4028bee9fae23. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR4EO2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4207bd83d86781a8281454753cd4d539efc7782196dda47311734b569d4f0b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZLH2480002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008379fbc06a62008c580da1a892a0a137a2e07187555d232e6d65cc2457d3dd. 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/FRZLH2480005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb32c947e636e7fce237348ad2a03f098bc0ccdf2dfc88bc2799734d9147b36. 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/FRZLH2480003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3898dd3def1ab5d750c5ce8afa3866a039d94eddb81dd7b365ae865576be7ece. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR4EO2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65129a004e673afbef6e1273ff907404a9138b1c5312328676148a3dca868d29. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR4EO2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb134f00e807c8f35d2454f7d2d6999d2bacaaf1484172b384be69db0a1c755d1. 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/FR3Y92100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc33214117d6398d628137c046c40b970af9f83afa18d2655e854250912bc9c. 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/FR3Y92100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91863883fd8cd991afc546a9ec6f21d738e62036dec640e6a933cc524c709ba6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR3Y92100009.