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 0x1bac0f78d9fd9a6a0c15a6eef9cd8cbe03867cacace67bd6536c89c5d62fb4df. 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/00eb795a-34b7-49c1-a791-e07e2d201089.json and https://artists.proofprofile.net/proofs/artist/00eb795a-34b7-49c1-a791-e07e2d201089.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 0x572d3f611f7fca8e574946ee539bbb69729a9e6deb5f73dad2379853ebd0cf90. 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/QZTB92310505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b089e0bd27f7ab9dbd37eb57d45fc99678f6469e14173a0c207d624973582e. 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/TCAGT2317530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a748ff34e5c5968ff946c7919aaf49a7f9e68b7f8124d02f91ee26a2aaa25f. 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/TCAGM2291449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe58530898fc6012872e792950cf2194f4785494ff5f83fdc1524fbbf037a1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAEJ1961879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b59151102b4032391fedd517db55ba5036ecf588cb3cd2e651994d8c72c06a6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NOX8G2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c86856dfc69cebae89bea840509a05c0317a9f916f34bbc036710ca41f4c5e7. 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/QZFZ42453939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e75c7b45061cf5ac51eac0de99b33a9a7b364c4e7f1e16e7af78d86346ec06c. 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/TCAHP2347269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6154991fafec1cea4bc193b7a812e7d530ef87138b52256d1b454970ee4cbf. 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/QZES92380034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6413c369874b123a630ff3ce5a13b8175af6376f814b31f18d4d052ef39ce9fd. 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/TCAGS2370965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1aa243222a00e2a2af7ebaf93f63d339bcf3305e803706487ba1a6c7bef7ff. 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/TCAGO2274488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9660e28238b280d592e1b825c1928966613b2a6310f6fc6cd1a2ac6a08ee1b89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAGL2263599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85768e35efad404601875e093de5fd47d8bf53139122603fecaa3498fb6270e3. 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/TCAGC2298328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee333fd07eb019e94ba691662c4095240b030807cd681b6a4f46d0ecbc1b154. 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/TCAGE2208166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b292ce39bd13a3c0fbf9d936818f6ce200af0bc0ddf9592b3952975f97d14cd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAFW2155531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627f42ec5dde86c4ab7b2e1ce187a84425a928edffac6696aca2045a274efac7. 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/TCAFX2196828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f018e4866c0271f46a528b4f2b4ef8ea63bfaa8e88dcedacb748820e6a01da. 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/TCAFX2102997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ce942fe86385010701780db1041a9bb2fe9e697ca410bcc37a4fd5aa0fad4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAFW2146494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e283bf4d26f1a51c936764abb24a3fb1fe2de0352d6aed16a375e426dbb06ac. 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/TCAFW2118442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284e56b91b207aa5a6d282657baa7dc3e3373c7e2e8ddfc30b1beae7dac48915. 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/TCAFP2171190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bb3fa4f712650515da5ebb7518c82020e9d2cc9cd03dd0855ebfea39fd4823. 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/TCAFN2180757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc9e6c9935187a292a917b2e3c254742f07025f5dd5f5db740cf47e09133741. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCAFM2137676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ed636fb2274a7652e2f71413ed3478005c5329238823449837351606d8c24c. 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/TCAFH2051873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485f3f6578e4ec817755603bbcc4ad46699da47e037a370ed74eea9dc346f370. 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/TCAFG2024287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b37e30240af63c7098e2280ad28dfc9c4b77361c0cc10ff0c64c852eb5978f. 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/TCAFG2029848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8a2b3d5f99a365524d3c63432f00dbd3c83f87c1a5f8fe0ce461441b701822. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAFF2085749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5b39219ba9a9e0f3b075980c6d503335d1ceab5ed530c43fb35986cc4ce57f. 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/TCAFC2067359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe538ce8c6abfc6edaf4d0f2755b9b79d6ba2764cefa129fe3aa7b12c5502acd2. 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/SEYOK2026292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa600ff7822fc25345d845857067e9d80d7ff4a1edceaec1272f72f86aabaf1e9. 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/TCAEW2035746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc17f2e39b37711e34a1c47928710f2b279c04de412710209f2224d536748735. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/TCAER2039364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dba91af9901871abeefcb4c055bae281edb572d3f655b8564539203587d400. 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/TCAEQ2086818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa80ded09d0ee61d11e35fc803cdcdfcaf086a549e797bbf1a888953c3b5d5c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAEP2059237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5213b6a8be219ebc22e9c615aafd3d91f072675884ad16817e3e5a0112557d80. 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/TCAEP2059336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd86f68aa7e9e73154b05dd9ab4fdc21e4d25004b981871dc6e0ba57060f21. 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/TCAEO1996991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce2e6ca9b8f67237852ce22b450318a650104cfa08ca65bf4a1d8254ad22bf0. 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/QZTB32355610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d836e71fc6cc8ea6db60551b804ec8e1d9285fb13fd91caa046667bed830cf. 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/NOX8G2302007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62c3e58df78e045210ae3e9dd5b4dbeb34f0e81d390f8b4d5906a4f8c6857b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB32269722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b9f296de3dd96d599892195dac485a464c96a298beebb873aceed1cf4fc555. 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/NOX8G2301920.