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 0x80dfdbe98103f111b3495b4a8bf08599388f5f228891532d3c8e9cb269795835. 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/f85c7544-78c3-4a89-8579-8a0fda098756.json and https://artists.proofprofile.net/proofs/artist/f85c7544-78c3-4a89-8579-8a0fda098756.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 0xb1ebdf3c8b70f82a519a51d24c9c8410a0a00451c44bca99203b98088cbabd66. 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/INR832201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef1cac49a2b301d9d64f4abf85ffdc108dcae97132f6799bcf74d1dde5b750. 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/INR832302151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a63f86a96c12e6c0d086fd0c419abe62e879a66b4ab7659cbb7d1415d0e1ad7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/INR832302224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dcfd5889e6674da7683ac2c46384dfef3286dec2b05a932542512d5f9f6f55. 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/INR832301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef1cac49a2b301d9d64f4abf85ffdc108dcae97132f6799bcf74d1dde5b750. 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/INR832302151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4376da61061442fb4a3e6bd114101f953532bd0b93d2c87d2b025fbf72d9b45a. 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/INR832302226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743a8acfbdfa0aefea7e7dbeeaf7e20ff71756ea9a14f8b853b55c9da0d3b7e3. 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/INR832302227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f877d7bfdfc595f2c6d2206f241b76c3cb15d46a256550b6dfc18887fb038dc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/INR832302229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4efc80feabc2fa503abd5194056fc0a425a6cea903b5ff65c73e4894a4e911. 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/INR832302231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b689ef61dcb6c1361005af2dba5923bb36b584caa95fae4df15d146d819a4d5. 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/INR832302198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e86090218c1376a953afbb5069f17a10d2df1dfe1134d641f57ae9de619cbdf. 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/INR832302232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eadf298e17b297936ae167ee8122796f8be8226e957e2e02eedd33d58b4d8f1. 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/INR832302233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf757b9206b0b42a921289d58a5613535eeb94aa008087afbf927f0a7d36e5648. 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/INR832302234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ec501b63a43768f8d34bdad34462d36de35e21e26fa39e7dc729d77704118. 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/INR832302235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4552a9fbe60fb8bd3a5583206a65f6dd68472e1913181dcdbb111db764716711. 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/INR832302236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b689ef61dcb6c1361005af2dba5923bb36b584caa95fae4df15d146d819a4d5. 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/INR832302198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dcfd5889e6674da7683ac2c46384dfef3286dec2b05a932542512d5f9f6f55. 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/INR832301920.