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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 0x07582d2d6d248f96a6cd5caa0d47ccc79a9a36f0ad57ad93d856752caead56ed. 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/0675efcd-3c46-45ec-a209-ea4820e51920.json and https://artists.proofprofile.net/proofs/artist/0675efcd-3c46-45ec-a209-ea4820e51920.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 0xddeecc3136f0fba1f1835277f6c5e6ab419925cc7af8606d48916b61c53b9469. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ4JJ1916766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cd84c0f740b1ad487b41ebc7de0dbc224146ad048ec06d9c175e6753b748f5. 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/QZ4JJ1916767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb699f981cf3b219d0a1b5736daa3d905094408cd9f83e984dddf3132f62df80b. 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/QZ4JJ1916768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd772d3490ec2d95b5fa9a88ca0616a06e0599402bac98bb296facabfd62870dc. 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/QZ4JJ1916769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bf164aadbdd21193782a6e8fe793bdb0fe8d25c2dc4cb663bec781f0f15155. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZ4JJ1916770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e08ed91bbf72c49a09fa61fdd17ff533ffde1b4047ace9abb64570db8819e2. 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/QZHN61928270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1a78c0612635bb077b60761203eb08e6736052a2e2c163016a8b6716e362e4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN61928272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da5fe13c5520148325bf63ee56bbe230bf1ba9e43650256331d76e0cf2c739. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN61928273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b87f50cf6c87d29fcd6c5a9956021e91ab426476596c2365d306ece8dbc61e4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:02Z), 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/QZHN61928276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2bd6910646fbf51953b9949bdfb67e7ba1653ec4d99d47020a542857b201a6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN61928277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c317db483ea89ebe1a5833b7fea8e2e5645312a054d80f181c47a7fb20d81b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN42002685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c30f8d35ef8bff156dd5624c71ccbf91773a9af68ead2229278156f2eed0cc. 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/QZHN42002686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e98e4c5955b7e1e593e992a67c105b02286133a8f1c92c854930ed0bf8b908. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN42002687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e73397c31c99d4bc3c3831fd1e750a4f708c0e2ea5e405988369f8be41e0d57. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN42002688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50255202366c29680bd85ab4647312d5f988ea23ab652c95c7af8f6fbe39456d. 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/QZHN42002689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecce3a2bb3487d2e3c4c7b6087e50ad3c914d874e7f3d514d7e106b84b3bb3c1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN42002691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d89518195969a67bd4a2c034268be86cccbb6280aafe089b679d8ff47eb7d. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/QZHN42002693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c1d98b7b0a93a4567b6dfccb4bde829439386a6bc828b75aa6e08f4d2bb66. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZHN42002694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2428ea2063a27e57e4d004e37d0ca37b2b5055d488c9e3cac3354a7ac88f2c04. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHN42002695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516e82cdb71a7785707e269221014e945d04bab5975ed3e3f43c97b39c95a9f4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:18:05Z), 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/QZHN42002696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be9b317eb294a9c953a4472703dcdf525b3b83c412004cb190e35f3b5caf3f. 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/CZBS12100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9099a4b656ea44f963b9fa2665a0be81bf882832b83a15df1f8e1d182028e465. 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/CZBS12100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca0d5a3e85ae814a0f487ad0ff271196ce93f597b4b15c975a835925ebbd262. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:08Z), 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/CZBS12100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be9b317eb294a9c953a4472703dcdf525b3b83c412004cb190e35f3b5caf3f. 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/CZBS12100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878a22a3f79d07cb8055dcea3fc70818da1eabb82e2ae16757e23190d0a20ad. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:42Z), 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/CZBS12100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5183c30493eea79513073a0cbb3421d341585b302fbb06ab4b47219ce775dd. 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/CZBS12100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ba958e79e8578c0f082b3272fb93cb7e334bba20588620d9815b2e19e900f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CZBS12100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7889c9b44d5f65b1da0e415a3bf18a202bed17e0ca8d728495f084c4323f5b. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/CZBS12100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe182cf470f56760e349f0ca25b5a63ec3868d32c1169989a2a25e7e90e91f8ef. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CZBS12100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dc53e0998bd7ffb034b743fb6dc4149852d3ee5d134c96d4b7184b41508d8b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CZA232400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119ed64246a475ad2a44e5734823d1f47c10a352343f21b55b99f7f5bb88e984. 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/CZA232400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da95e146d3054b4d6550297710b99efc00f5a6e62e963c87060e558120b1fec. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:38:53Z), 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/CZA232400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb80c96e6203a6c39077ac52a74818c668ccefb782c9e02707683ba689d758f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:16Z), 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/CZA232400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aed1331133f9365c1783024bed5b6ccf4991c7def40571c32609013e292e48a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:44Z), 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/CZA232400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3f8e6ba65f3196572675e0ab2d6282166c0c46555a686bb9b253ce9e36eac1. 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/CZA232001084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda17f4705b10019ce070e4af39a80127cb3b5b3f7a7ec156dd65d6c411541981. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e7ceb4cc8aaf5fe41421d4cab1fa9c4a33156d57168ecb2b229bc19c5c4df. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882081402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748edafd729ef503d59bd9d8001ba4ae79028bcd8d148376730b4828cdb46bfe. 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/CZA232100143.