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 0xfc6021a53ee5d78fa4fb052aab42348f5d8929a30caadf5fe4e5ee3037ea62b8. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b76abd44-be0c-4e06-85e7-bff8c5941388.json and https://artists.proofprofile.net/proofs/artist/b76abd44-be0c-4e06-85e7-bff8c5941388.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
7 merveilles de la musique: Jacky Coulet
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 0x297d5fb04a422a6d2529569425a964db7d361f9af2f9d845d6562052eb8347fd. 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/FRY510885703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ee7467ad6cebf1fc87b04e7993dc0056d57f8bc5683d577228c3d9910314ff. 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/FRY510885704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf5397311d60619f2c6dbf405bcd7f7d48ee33c726950ff9e1cb64985f207bd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRY510885705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afac19c81ecac925d5ff380d9fbfe1a6204235b78dc8e3364c095b646b27f34. 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/FRY510885706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8756f19e95fd8a140a427cc13e2b3b98bf7e3e42db2f72a881fd0de521ae73f0. 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/FRY510885708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4b91bbfa9453d45ebff86b84490e578e9820829f23d894e52dc3fe822ca93c. 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/FRY510885720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8967ec3927d2d681378614df719a74b52d6b6541f062999646c3170e2a86e90d. 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/FRY510885721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa514e5af20a43f77ae793cffe6df2f429ddcdb208e5c76a65b4c8319b69f17d. 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/FRY510885726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca1a2289d733914285590e3d1772565770ae0658ecb1cd4f63aace63b98467. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRY510885728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4dd16f7c16c8d6040aff55a127c3bdaa21630c6d05736b7b2c8e48dca2cfad. 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/FRY510885730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ecc338f0c3751a3db99fea91731b8b19d52ac2352a4bafc3396cedc6fc7e19. 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/FRY510885734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdcd5f3edf88cfa8fd45cfddf730957427df09e6b98f97e0f242dda520b1e7f. 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/FRY510885737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7f4c11202188f747959ad2fecb534044dc95d22e01eeebfcac68d703f6da1a. 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/FRY510885738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc055c32d908c3d6d4ac241d42a8a63a80edc8b77ef70efb01122ca0a89ffdfb0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRY510885739.
Italie, Espagne, Portugal, Sud Ouest, Vol. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c98b044047909e4ee732f6fa4af52e8f88d239bc81e580547f755e5be4a513. 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/FR00S1900100.
Musique de nos régions: Vendée (50 musiques traditionnelles du folklore vendéen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25352ec00ba2c6ff2402ebd2904ecd395600eb26ceb8cd959282cfcb77ece86. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR0W61316651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcbe2dc2eb8193de71d13043d2cf8330619b86cd50899005db09a6f008dcac5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR0W61316659.
Italie, Espagne, Portugal, Sud Ouest, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729bbb81206751709e39dce4f548d8d9add449b8ec7f9b8391b7318d9605db5a. 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/FR80T0201334.
Italie, Espagne, Portugal, Sud Ouest, Vol. 25
Italie, Espagne, Portugal, Sud Ouest, Vol. 2
Italie, Espagne, Portugal, Sud Ouest, Vol. 1
Italie, Espagne, Portugal, Sud Ouest, Vol. 3
Italie, Espagne, Portugal, Sud Ouest, Vol. 24
Italie, Espagne, Portugal, Sud Ouest, Vol. 5
Italie, espagne, portugal, sud ouest, Vol. 21
Italie, Espagne, Portugal, Sud Ouest, Vol. 6