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 0x5f9db903d0d9b0412f2d4f9ae70670c9803929f9bb9893cd4b1e33554897d68b. 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/f8da6797-7124-401f-be7c-278f97e11e99.json and https://artists.proofprofile.net/proofs/artist/f8da6797-7124-401f-be7c-278f97e11e99.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 0x366d7b655826ab5f1c8be916c918d2243aae1ff711f28435d98530a1adb6199a. 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/HUA630800485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fc5ed1f6b32808dda38c6f932222bff670a489ade3326a7dd8ebaec681d866. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/HUA630800487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8b234f1371449a58efc1052430c09682150e3de95210ea10d33d6fec490ca8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HUA630800488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0cd77e3b67c545ccb202dac2f6da055ca95bd820e61cb5f0bb1687ba7f34dc. 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/HUA630800489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf99e11d629cff157508fb57556e840f822a1c2c9ad71f9bb27e95f7dbfe1c27. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUA630900621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdda6acc45c814c1f686fa7d4274a37ddac2637fb182258f9ffd26bfeda336b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/HUA630900622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d4d3a2fa1afe5a2d729ea60b7f5dbc4c75383e0f236f81b3f028faa6744993. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/HUA630900626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec6e36dd2ce2321e57ad0fb6777ff5d6bb44a9fd060bed49151fd3488db39b8. 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/HUA630900627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3932391ca6790190bb03d59cab2b7fc78f21b7cd975cdd071441109e9281133. 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/HUA630900628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db5ecdedb1b13d8558c6c24456c8cac83164881cb81a0cddbc568b3caa939d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/HUA630900629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34463d2a98c15d2fef734c215f4431f498b11d94ee8217a116ce30bb7f10d9ce. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/HUA630900632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccc70fa5a1c14ffda87c3996b9cb879a01269c20bd1e5e08e7858dd662d83c8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/HUA631900689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5cec3b31384a2da5f336ca4100af8ccb9542f03b0df776b0b5e2b73753c2b8. 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/HUA631900690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa0b98babd8e5916125e66dd5236404cb0e0a4cdc924f3d729183af13c1d6de. 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/HUA631900691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc450db5fb99fb7c526c8c50ab4d66699fab4e669b97bd37c6aa60061fc6d71cf. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/HUA631900692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef264a5537e0e7c04b3bcf1d3ca648f8c68192b34ff98efb2df31632d51cf1ba. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/HUA631900693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97136c3c3ee18e8a1e2b586b5f72568601938bcfcbbb15b4ad2d2419200ead46. 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/HUA631900695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9374b8fb4d257b367febaefc688f0af44794756c72be5c3b9190fb24241ea35c. 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/HUA631200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2e5b929981818f9be9a8b5420d1a2ff7a6fbff57e59a00811c276ea28edaf5. 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/HUA631200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f3412aeb844792a958e7b9b1e083ef02852c24a6b47d63ce1813e711ca5cda. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/HUA631200298.
Hunyadi és Kapisztrán Nándorfehérvári Diadaláról ( Saltarello )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1a67ee519114b1d4dcd4d6112e9a0e8ece189ff7c95f2862025229bbc5a07. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUA631200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0635e40d6e074a51b41142b55d3d9cc4c650dc54270e95449c3754378acce6. 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/HUA631500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754c7f85074d198383542b1c1fdd42d672b6a20e9f17be8906ba61d41407951d. 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/HUA631500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d2ae5b57d475bf15a8b083e9947e84c83027f0f24e9a1f67d4f8f9c1cf55fe. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/HUA631500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea7e73331c9ac0a536fd14d80b1cc06dc109bb119b75b785975dff55ac582e. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/HUA631500564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7adc897dc7f51318f75de786d6ce2a5652a251e98c73e4212f0adcb38536a3. 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/HUA631500566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81765013d912d09d53638ba5f9b4f4f3b02685e6178fe54b942b66a0183a988. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/HUA631700541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6329b0bd2721e5d54d6755be1cb0bb7a3c384dcb23454780bf7262b4f3840e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/HUA631700542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6412de4efbf1c38fd8dd215fb9e98cee71aaca47378867d74f27ed0a847dfb17. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/HUA631700543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ea6ed324e04c1b4db6b05515a8cf2ce423158fd499eeac64245ac63d159585. 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/HUA631700545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f38e0a044be720a0b1e66b73b113a3836ca4b6d803ce6a4cb65f64268ca5d49. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/HUA631700546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e1e5dba850079c9fb3cf56f3a6cd87a6c5bb6236220c6214ff0a3ccd072750. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/HUA631700548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adcfcb062819f7e403772e3461bc5b204941279e077f90e6b5c68967c271db2. 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/HUA631700549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba97fbfeb47b6bb1159e1d74c05c7d09639ece793fbb45f252fd2041333bb6dc. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/HUA631800659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d296dc887a766d1cff23f122ed7c29234d814fea3b2b960c85acb1f951230e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUA632000419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7bbcf3a8bd66680f779c605c4c9b1eebd48e3dd51e0a2890a141e5d8adf4cb. 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/HUA632000420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4340419a40ea842d1fbf5d00ab7b62e218876aa880cb1e805f75a231a91e0. 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/HUA632000421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa075bf03a7e71fca5e2f5dfa99cf4036de04d3ef15c10d218ae7363e4dbd71cc. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/HUA632000422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9030187361e9c5e8a28b256703b2795b297541a8802e53a5b048800d5ec9f940. 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/HUA632000423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b99c7763587894d3d421ffbaa76eaa1d5bd5c59934d40049d37f9f526e1d94d. 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/HUA632000426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa339b230dec5fbc48eaac0d3fcba991f6e5e9f548b10bae51e5a514810fe22. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HUA632000287.