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 0xc9c52b61cc77f234e34827d8a7aedcc05385c6c61cbe3578cb9ea779e6dfa00a. 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/67b10343-c121-4f5d-94fd-1e4fa5566da2.json and https://artists.proofprofile.net/proofs/artist/67b10343-c121-4f5d-94fd-1e4fa5566da2.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 0xa636d8856698f5c94cdcaa61842e30d50c023250b169058035bf1690a6340f7c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXQ892300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a5c9419e5b882dde707bda425ca5332784aa7e0296a16f8f3870cf921b203. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXQ892300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c0c8ad258dbf3a19afd95925d7284883ad5fec6f417a81c9775a8daa20ac12. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXQ892300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd453ea916da19d3465b4a899e7fe2335c099dd638d7349eecd3046b34903164d. 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/FRR642300069.
All About You - Récréation & Ødyssey Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903cfeecf31e9931d0b913a5b07444e4c8153b1b089ac413fe80691b4da0be25. 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/FRR642201377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f079e3d3532f4568308617eea27151adfbe5ab3479d21dbb7c6b02dbeb55607. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRR642201552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bb77e06f47ef8d71824ffafaeb1c6703573c00417b36a7c82d1dfa5b537c80. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRR642201422.
All About You - Nounours After Hours Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a7b406a2339a77dca6305f6d0cc71c99ac46e2019918fbdfda6165151a6b7. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/FRR642201423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f4e0dc403703c9bf53215c0065c8070c9b840a2511790567b4183388012895. 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/FRR642100706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0cc527e274a3db485d7fb09fcdaf23d1fb169d5485c44caebb100a4a42dc2. 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/FR9W12231516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c68535af02abafbf37aa32ad7b177b2c5e2dbf88cf6dcfbc802a5cc7e28610d. 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/FRR642201183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0eeb951d47c5cece8e913a792b6c582c6157b481ee2ab79ea3c0e4d06bc332. 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/USA2P2230509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0861513189423210831912071348b6c5216db458e9236ff72f0bb14236f01c03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FXQ892200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf343dcd41e0183f3549f041a332adecdb3c34981f5b385150634b96659e1083a. 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/FRR642200366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206b822b180f3bada7de58b11f01630358669dc5de7c51fbec8c8d195d4f93d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1A92101694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869474ba69fd3364a659b55883804e5c1eeff47d6e1f02b2494d52138799a7f4. 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/FRX282105481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f4e0dc403703c9bf53215c0065c8070c9b840a2511790567b4183388012895. 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/FRR642100706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f0b210d1743ad7a82f12d435503d1a95b3169f0773d42e23b13dd73d6773e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXQ892400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379f48f399c175c83a616dc97af5fca8818afd81e302cd42230658f01aee5e2. 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/FRR642201770.