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 0x97d27ea4d7342b64a63228b553719c538f8ca73ec9dd8fa56b8535ac7f96b20e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdabc866-b526-4935-97dc-6baab4ca1be9.json and https://artists.proofprofile.net/proofs/artist/cdabc866-b526-4935-97dc-6baab4ca1be9.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 0x67827ef753bbe4185846e2eec5ab3d964062095a0bda60f348557b90ab25eed0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6J2168674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a9a860ccfa4b238334c3eeab8815286da5d6956c7d24553202881f4c866d4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:00:57Z), 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/QZHN72179649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf53ac51a406f4a426f972890a3db1a72f35c8a1f560e8fdd41b461fbd30f5d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6J2168676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad3e839884cbdd4c0e479eb82f631d68871726d67f7dc45a956cd932a0b5671. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6J2168677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2a33369ed3bfeb65f90870dc2cc340bb634dee8556bc0219a250bcdb5e8155. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZTB92268017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757f54f9527dff3b3f29589883688d586b972ec3da9a36486433735d35024d5d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7N2511454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa734bc8d1d4c133b285b866df169e1592b17a0129d5b01cc31da27b7c76ffa23. 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/QZNWW2074642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e81fb8305bdcde1adff1fda814528bd5327adedab1699b215f52b0f1eab86. 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/QZHZ32198595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f78bf4c68da5ae1b4ec661b1eecfff94f3148eb043b8533745bb74b3396085. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZNWW2074638.
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 0xf049bbee42863c3767b45fd2e83b8611bbf4524664c369e7854187b445158ce6. 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/QZNWW2074639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74efdccf0e0326fafd6400866f9853bf0c27c3866a0b9c7ac2bf997be6dafa. 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/QZNWW2074640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232f57d501659afb58ccc117ebb0ec34a24ae0a5f00bd311003232ec791e645f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWW2074641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0daf2f0386f1bff7705420a269cb5068a9a0a63c976e16130f2f39bdf227e19. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZNWW2074643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09c841b2f57cfa3929375a2032a9b06ca81f02e3014bcfeec7b85e095e2006. 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/QZTB42268922.