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 0xd02f19f4caed1bb0be7ff75956d7da1c0c7b4b3d2b6c92834143e3c31928c69e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4468ec54-049d-4074-8f46-976b234e4a5c.json and https://artists.proofprofile.net/proofs/artist/4468ec54-049d-4074-8f46-976b234e4a5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x68222db55c8d9d96b4487c80dc60c67cb721e2b5a7c630d76748d27ada54e09b. 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/JPI102301937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547fef1ab7b89555455cee155b78370ed9887e8d5d30c6ab21d8715f54b1b9e6. 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/JPI102301938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792ac24c94c417e67c7b7c472c8fbdac9ba7a414467d56426b7e724e8d5a725f. 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/JPI102301960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4d19017b07caed9f4c0a1cd9c1eacd91e855b6fa173d793a01fabc80d374c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPI102301939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4cf922283a5cadbbe4587d2f69fd85bd76676e295db7a1b72b2315d8742517. 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/JPI102301940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c928b799dfd10b5540d907b888ffd317e353bc4c39bd7745677f068a4a23ce. 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/JPI102301941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954cee7e79db81a173ac761c1397f9b4e572284c362577faf1b7efa715d47009. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPI102301942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0865af9abc279b26b8b8da985155e59caf19778a2d2fd2c299f318ff42d2ee. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/JPI102301943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde00e291389f037dd869b2a1176e3fa2ab53e84acce89605bec1a0ae3353a697. 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/JPI102301965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2877476cdf6457e71df047419e801889543426af53742125c96889a7a9316c. 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/JPI102301946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40ccb3b18e6aee9394285560b3e59f1ace706d7cd96f040b708a34de328e8f5. 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/JPI102301947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026491d5c6f0454cd8d69ab04c6a104d2d59b7a9fbb724370d8740482c20261d. 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/JPI102301948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692aaccecb1d0a189c529d8a7a3cd7307c3e214c22e4013e53bb997ed7c7f352. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPI102301950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3af6d31cc12c9da067c53dfc19f7f724b61740095408ffb74491e5b3e48902. 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/JPI102301955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4d6ea15dd4f386a990779f68f34f197f57eb2574d2344d3737a18416de6001. 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/JPI102301428.