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 0x2dc72ad124dd7383e11d0fd5f70aed37ce52280d21b399c67dc6b3c41dd6351b. 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/46237a59-1d0a-4e29-8614-a167da0dfb0e.json and https://artists.proofprofile.net/proofs/artist/46237a59-1d0a-4e29-8614-a167da0dfb0e.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 0x4f0199f988f600f60485f41d3db1544fec753585566050599358f9d5bd67babd. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/JPVI08704710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425567bb3fc76b6ab3fc40b2443c39ad2b6ab9a0c1744bbb039701a4b132d274. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/JPVI08805820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6ff0273e4316d4735c13d6b3c61c2628714b348157f359c9859d041b15264b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPVI00827950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192f15470c61e39c93d74bb40db3890e940e112d5a1c37e2e18b6e62daa00a5a. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/JPVI09004470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfb42a29d4aad54e8aa700423582d40c23d2af7946476d50faf5c5c8eb48a97. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/JPVI09014070.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8da7944770e7df1348e257a99cc69377e4911d7bf42b97fcbe676cd808b28e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPVI08906600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a95d66a15e2455307fbbf21d10160609b2031ca7cecc82eef9aebf9a4fdaa8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPVI08704780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc44817e178ad96b1df9143359acbe11d9b1abbf9fbbb10dd32e7a4191ef3365. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPVI01224260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcec53957d19bf3fa089ffc35921055d53da0f75c83e451229e6e21d4f35dee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPVI01224270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabea679e4e94b82b2e667fda49b88a6b9557f87d2a78d54acdbc1b7ff2f71465. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPVI00827980.