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 0x27826338118ccb0efb8b02c23148c0c13f434a7a7720c9e76f462e23fd6915aa. 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/fadae15c-95fc-4bac-b905-946e3bf9dc10.json and https://artists.proofprofile.net/proofs/artist/fadae15c-95fc-4bac-b905-946e3bf9dc10.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 0xb305f1d74c964d584fa224c5bd30680bc7a85c6136106e4b25f0bbb7d6cc9ac6. 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/QZNWV2194902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab660080e57a8b8d42f22e41d039114671e1c986484a2ab1d3059d11fcccbd41. 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/QZFZ22251131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fe6f0141c8a09addd4a8d99c9669711df70d4fbc582a17643914352f660768. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6P2283125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297427fdc5302a3a3c148f5f3fc82dcdaf6dff98f374ac50c835cbfde80a9630. 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/QZMEM2236363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17828edff60da5e653e8b8b3de681609fa472b6e6a0f6a4c79d6b2c7a77936b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZNWY2291491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d53ac0486c4bc9f4f850dbb71568205610981184f00bde258a1eb5bcc1e1d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNWW2250838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77237de19e855ff62ebcac4432b120b7f4697f407fe75a5d168abbdb6408e96. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFZ32334472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0acfcf666e64ef99b6c47f8cff8545f843ef6cf84ffffbe288c7f3bda387e0. 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/QZES62379222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea09dce85be4157995fd88c2f9b57a246e55b7cb27d6101fa2f6611fc99273e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6N2384261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b373b98cbb32a6032f26fffefce73aa70e6420d7dc479f80329b68fd47c6f1. 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/QZMEQ2308008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce82a2561c8e6700f08628ac9cabd4eecf654e43a018ed0c9b0dd1b5acf8827d. 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/QZTAZ2345919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fb67560481569b17a0da5697fe7bca1671c765f97562ce7148f9f8459b8248. 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/QZTBA2321697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29e5cf6caaebefafda76e625663eb58c7c9dab201cb14ee82f0b81932d9b019. 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/QZTBB2318157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca3cbe66fae8497fcbd41d557d30f363e7ecee259f1d1c7caf63a87feef78f5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFL2398899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646ab5b5228bdffb08739a018735d66d67d278aa580ac13984691c38dcb7c89b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ22437350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5de7e095657cafe5674fe83999a8b61fa595484264395f854cc98ddfa7e1fa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ62433659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf226c39d3ca1a4aac20a5b2028f351a70b69379135910bbea428e5260dbdcbea. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN62079044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e7150c1c6e9c26b74c3afb4bd57f99de329dd44d0953b2211bea94dcc157cf. 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/QZHNC2473446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf4115b75ad33536baeb44393e94f026d385650330e75241c2faad30bcb430f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ72146591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d51c0cc4645062b54aa1081b9906abe7daf4c36bd1ddcbedfbe2f7a2c1188ff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB32426154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fe6f0141c8a09addd4a8d99c9669711df70d4fbc582a17643914352f660768. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6P2283125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4e176006111909ba81dcf7b1466822ab45200f54df83fca1caf574400641f4. 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/QZK6M2243222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4112ae539eb5f9c3c9ac5479b3e3a99606344fc5fa6b927bc79aaaf32bce4a91. 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/QZK6G2341386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29e5cf6caaebefafda76e625663eb58c7c9dab201cb14ee82f0b81932d9b019. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBB2318157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17828edff60da5e653e8b8b3de681609fa472b6e6a0f6a4c79d6b2c7a77936b. 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/QZNWY2291491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b373b98cbb32a6032f26fffefce73aa70e6420d7dc479f80329b68fd47c6f1. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZMEQ2308008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646ab5b5228bdffb08739a018735d66d67d278aa580ac13984691c38dcb7c89b. 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/QZFZ22437350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb8f70793aaa644fd1d3cd43c0f4ea1efef3d9574de6a28b59840b6f29bc90f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZEB2469005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e60ac155e9ad0863f4b17cad463fc40d54c2332fe36222f2a0227a9296c5a3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWV32544348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a580af373b4e1a4bb70c5193541e186c7c6987ed7e94c69dbc8edaf3073aed. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWV32582002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef887a24fd814a427b036ffce686c30ae74388148eea89043f38895ee5893f6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWV32589513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb941206d4debef44b782b10ef62625cbd1953e474595c91a4c69518eecb9f3df. 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/SE6I31971132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b478cfa8a51310db1bdd16230b776c3aad289fc3d85547975e38ec38307d1. 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/TCAFU2139646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b478cfa8a51310db1bdd16230b776c3aad289fc3d85547975e38ec38307d1. 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/TCAFU2139646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db49cf4b3ba490d03dec94d9100bad91226bed03b5263dfe7f0a51efc03336. 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/QZFYZ2213388.