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 0x2d8b0a10b28514b011b67c282de2e1e50f946d10711410c960cfb9b7b04e0bb4. 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/809e0095-b53a-43d7-9508-76b269821876.json and https://artists.proofprofile.net/proofs/artist/809e0095-b53a-43d7-9508-76b269821876.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 0x222f2b8cb13fd8b4550d63298e5a4be19f38b1f794803ce8e72ad5937dbd4b97. 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/ZA56E2416547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3abe7f7dcc29f8ead2dfb83e1e24dd1dcb7fa5dbfc455920e9e01f8a69f4a4. 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/ZA56E2304051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f2b8cb13fd8b4550d63298e5a4be19f38b1f794803ce8e72ad5937dbd4b97. 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/ZA56E2416547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f0756efe039b8b8786509da7c98e42860f7af61b0de33f346bd064f255d315. 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/ZA56E2416548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabac74c1ada49d5508f1c5da93fe373f7b49039424cd09f6cd799b2ac1d7558. 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/ZA56E2416549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88deb9b1a9aa903f18a59210913d6348c15415059488eeb1f3358f2e196f2ae. 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/QZNWX2405779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf42741b590f55749a85a3d11ea0ea46ff7081cb92b9386e26167390a6a9456. 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/QZMEQ2446397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd830f2f6deabadcc1daa5ca1edbf8184d987fb32e742444dd5afae5b0d7804cc. 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/QZMEN2467117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e256ef400bdac1e47d6a2c0f9616db9f92236c86e3c37677a337a5826330934. 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/QZK6N2469594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf209520d8abf823a002bd5bc462bb0e16e09ba213e792247450990e9762abcb4. 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/QZDA72413674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6aab45bc5a2b9128351355fd84d94fe6d3b6c2d4d58479843d4856ab13d136. 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/QZWFR2362410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7418ca39ba747ed06269e7af02dc09bc5bb59c5758a430a14de798d6e22daac8. 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/QZTB62397828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b523b700eca65c7c24cbfd0da146f14ab2cdbd649373bb20c61ac8cb2c0d44b. 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/QZTAU2361181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf826569450e8aa949aa4ad89297a27e15169a7a2a3e77770c1dddd4df66c34. 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/QZMER2372948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c3459b0fe7eebeffb5072130aee5860c52900e89222a399b50891287fb2d9. 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/QZTBA2280084.
They stole my hard drive so I stole the show
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c77f3336aa3d650f702d8e78eecc21931e9fabb638d8b204ac5421757e8fc. 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/QZTAW2209353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045fd5253cb9f7e7e299d6daac071e7a10ee308e4f8fdc02796a3148de03ac6a. 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/QZTAW2209354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6488eaed3502c86d03a433f0f431f0e4a45e4ff46a695fa77cf5ee8f31f9216. 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/QZTAW2209355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07595313aa6ade301ca954b4a3e5b6bfe60491eef9ea5e22acac5ccf24525f. 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/QZTAW2209356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2343d7a02c75bd6a2587977e02380cfec203c4bbca6f2acbc266e366b3d9da98. 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/QZTAW2209357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a614b9b02ab234ddbef645b78f9ff77492f62958c538541dfdcfb0b6a1ab1. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZMEN2263243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0132ff8434bbf5d991958cd77c62df475be182a19de085c95ff839236141e607. 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/QZK6F2291175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0726327e4251f8267e9b26daae36b50dd60af3bc0169d06c8af61b396a7188. 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/QZK6F2291176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0423b3550c8b0dfd8197cac6be1206264bca1cb0847b5fa19dc413631ce8b5c0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZK6F2291177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ad91ba2fd2a38f2cc83f1f72eafa987ffbfc047d3c9ec37048a8ed6fdda790. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZES72279621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f64cd4bf6fc12b6d7f414d583e34db13498de446211a215ae237c036417b31f. 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/QZNWV2102378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb739f829c8cb38e6b65978611e4535d181fe40131c72ea9a60a17e9330fb7f. 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/QZNWQ2087755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8494541d05c7842353317ec49813ea3df5b05382bcf62b430688eb9ac8b68c5b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZHN81916066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c49daab067802eca5e6a14ae30add7595c287bfc9be2bad3b080dd2aef42c7e. 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/QZFZ61988807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a6bc98ac344787db9d88c9aefada7d5b6f1b5515e8b46ee0bcef3a72e17aef. 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/QZHNB2430850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd275d03137d81a49e07a1530b4e21c5a5acd95a13bff585d7691b448918a9df6. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ZA56E2304050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3abe7f7dcc29f8ead2dfb83e1e24dd1dcb7fa5dbfc455920e9e01f8a69f4a4. 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/ZA56E2304051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e115caa80cace08357e893ce050a29851281bde32023b46de678469cf0cdbd4. 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/QZNWZ2118952.