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 0x482ff23e8cb714f4226bc9c20ad55af136d6d601602834c150d44d94621c113c. 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/54d0531a-0019-4564-a656-f14aa4c445ec.json and https://artists.proofprofile.net/proofs/artist/54d0531a-0019-4564-a656-f14aa4c445ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x9ee14f663899de1419664e20621c5b99e1476c6add9c4f390f4f6afd9d6b4324. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAI602294701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f999012029ead96e8b10a3d2fcf9ed78c661af9b6c384a4f0c41bc6f7b276fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAI602294708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fc4489fcec0fdb7a725a3c7e0bf80c83781ff3db10f0f7f08aa67cf1fe2760. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CBEF02400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f40955026ba79b29f13f4e40a89bea9ec6b10a847c48a9092cc111be078149. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CBEF02500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f40955026ba79b29f13f4e40a89bea9ec6b10a847c48a9092cc111be078149. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:13Z), 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/CBEF02500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e4986ea536fc6a33bebc04cb1022c4d4731f56b2ce676e9298f08b3b67b759. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CBEF02500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ca39b062f8a360c515ee70798cee1e996c9630d52652f9b3d29309dc9f273f. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/CBEF02500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fc4489fcec0fdb7a725a3c7e0bf80c83781ff3db10f0f7f08aa67cf1fe2760. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CBEF02400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9524c9386b9b63b99cfac21306ff13633ea31e893915a59b3a8c547e405f0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CBEF02500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479157e26652eb8f29f52156746d085fdc9083489d9314f58f26c662d5cb6ed8. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CBEF02500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4bd7f89ff95432d596fbba220a583883ebcb93cc08c1907a011f14d6c83bba. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CBEF02500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb322dbac603a5a47f3d12ecfe40d309667305cbd62ea2eee323569d061bf5. 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/CAQ522124003.
Les performances des candidats en danger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f52697e39a0b8a8cf945b23355e6d2547bb0a10ea2062a2c414269fb6c2f216. 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/CAQ522149009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbefce5f79cce8f8384275aa1d1b4a97a79b51a8e9dc24734e6ec7c258131dd. 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/CAQ522149014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2955152dcf9519b39dc4449efb266a0b80c2e8429b7119c2edf9d874fa2c47. 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/CAQ522144006.