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 0x2aa67165bc68362c17f2dd1f7c998c0a3c43eaeb3cad7259fdedf3c57f3af1ef. 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/d1cae7e0-17b4-4988-99e7-bf713e964deb.json and https://artists.proofprofile.net/proofs/artist/d1cae7e0-17b4-4988-99e7-bf713e964deb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ma 6-t va crack-er (Bande originale du film)
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 0xeb953d79baf4be0dc9a67f50b96302b5aaa4fa8727b9032a9c1e06dbfeefb65a. 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/FRW889700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04796f3d469ffe72f838a4f61763162f61f6d4332ca8c1234d488f2964868b55. 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/FRW889700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4918c51f4a6bd388a720bd377cd962a75d04acbf8f648ef1d63a6c728c04a99c. 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/FRW889700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf50fdfa8bf35b04fe695d274099d03b1051876508c4dd5ba6748bdf5ac0d82d. 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/FRW889700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bbab98e91bf0498fa2ff9d1599626d8e37173ea89b67c4b891b692ab6dc571. 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/FRW889700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fae07480f58a1588002c8814b9fbe2ed1864277a1c4a2110e58cb7d04dbc01. 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/FRW889700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f8f4d3be115241003a7aea72fc0f535e99ba13945b525ec4b82bfe101099f3. 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/FRW889700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53898dbaf6663ff630fc91752b0d7f07f2e26021a3305ed09186b40e85889ef9. 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/FRW889700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53179ec3ba144949600a96407c22dbe07e38b82be26c1b63a32df38493566bd. 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/FRW889700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60bee932fa9384f999c2465e31b11fc3f19c185147436b8ec4886dfff96b24a. 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/FRW889700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd39dd8a12b0e14c49ec091ed2e170907330041f5f1c1a0c4ee95bc2cc475185. 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/FRW889700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1694a60ddee5b6d7e3f7997754478676a9b76c8da34659636976040b64d6a62. 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/FRW889700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938868a27a8c39b6c076372a1701bb105f45fac9594016acd958fc776613d69a. 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/FRW889700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59201027d14daf8a8472ce22f24199557ce3dc56be8c2703907420c2f9fbf9b4. 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/FRW889700017.
Ma 6-t va crack-er (Edition spéciale 10 ans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0d607a49c5d2bd79b7d5e4e367ec6e01beab1b53098a73cf0e5a934276a134. 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/SR8W10500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eceb66acd2033be0e59c23c8a5e2ed554ef6b158373d3a2fd6db8f96fd933bc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRW889711004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7d554a80f5a0b04eea4d9de525a79f0b0c4a05bfc41cd0b419139aca47909c. 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/FRW889711005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b2f3397407339bb2c2d6198ba4f3b1ba81dc81179096ec6795248d86cded71. 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/FRW889711006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030cf73b9ded55e15e258955a0d4422922128aef115e17f0bcd9aaddae22229b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FRW889711007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb831f479a43d08b7ba98719e58518c260bb51313cae8d45030bc6550ad5c952c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRW889711008.