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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be05c98f893b1f8b4112eeb9a009f9e7814050c2cb67eb32bd6144b6b695eb2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0db785c-c875-40f5-be91-7a5a4ef6f58c.json and https://artists.proofprofile.net/proofs/artist/c0db785c-c875-40f5-be91-7a5a4ef6f58c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855d6cc6787f2a54203490b0001eda963c5b233751f8d282bf185bfffbc0b5e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPR502304564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af648abccc046ba6bd425dfa5872954ff13ab81d902dea2dc661d1d617bd9c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPR502304567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fcd27d7eefeae6a7522714bf2bf05fea753e2c260c323bc6ed9db43cfb6ab1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPR502304562.
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 0x6ae87efbfcddda5f9de31bcf7ffc3738eeb91ae07e6e4fa5c341a9b4244094dd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPR502304563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0094b1236df1387ad1e19080357e5aa3f220c5b9c65b9a527d11e2d7944955. 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/JPR502304419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b1ce38363cce85a2466d074d217b8a89723fea8f6e870b9377693316022866. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/JPR502304421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da628fed8f51f32725edd13ce650042e1d44a31b58401807c7e1b2fd52fadcd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPR502304418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed05a9cf9187368a24a51cb3dc026989d08efc95633e7a27b4f64e8515b0fd8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPR502304420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd427760d078d364db746c2d1bd56ce5a662e5bd2960d3dda9dc8c71e9d6ed5. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:21:16Z), 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/JPWP02100928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad19a55db580bcd54deb0f3a2c874aea1457e9ae175de22de8761281b009887. 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/JPR502200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6f4599eaf3078d6cd88a3fff9d723517c2996885b0ea0d0f5b06c18765b157. 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/TCJPQ2128545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee257be43ab715712af4791f267e2683a4cbcfdcc51879a9cbca329d5bb896c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPR502200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6881178ce01fca68b952a81c7399fcccc84ec910b47d86e474b2f242fc349dd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPQ2109464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff61942193f1d87be5ca3400d4c50f81bed0c84184eaddc21df87ebf3da4e2. 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/JPWP02100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33edaf8777b2aadcb0521059086353b31b5e85f42e36ec4eff8912d157c25629. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPWP02100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e1ca3b71f4aeec0507babd53198d5c95d9c4a75526b62f8ee468a048a06c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPWP02100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179aa9a40d8bf0bcdbc555b57c24dd36bcfc32ab7005aa7b9727382ea7c85fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPWP02100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a92885be987e8f022b455f120646ab312a1af9d2fb6a6c1431d834bbde92603. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPWP02100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac11e202de90d1725d5dd945b8be1a5c022eaa7856b8e41ef2f4fcc05d8d1fc. 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/JPWP02100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60c9754a06ee2a2fb9e6abc8dfed7fbe259a25d617de58afd428186a0f508d3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPWP02100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4059389b8dc11fd25bc7fa744d55fa2d6637d0bc73ef4c4cc5da68eb8afd10b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPWP02100231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd427760d078d364db746c2d1bd56ce5a662e5bd2960d3dda9dc8c71e9d6ed5. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-21T23:36:21Z), 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/JPWP02100928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82a2ed5473c8f1992ebb01017f6bf75dccadde42546236bb402675525685d95. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPR502501723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe113e46b9849ea5b1aaa2964bded6d7cf1e5a5615568f104dd16cec9e4310765. 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/JPR502420338.