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 0x3c6c4bb955449cab50ee6a0ef6422c117589cb4797251dd9a9cd2f5bd10eb85b. 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/2c4cf156-3e7f-43a5-baf3-c42c2fe40f66.json and https://artists.proofprofile.net/proofs/artist/2c4cf156-3e7f-43a5-baf3-c42c2fe40f66.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 0xc902e63750e4129f86d3690363ad37cdff2c6c053a8f80475eeb0bd9945dea7c. 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/USLZJ2299243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556241dd1fd824765918339f9e5917becbf2e2985f6cd7626958453bbc841f4b. 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/USHM22138443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc9620fbdb2118d12954caa2ab5d6cf6e0f6e38205c9741f31ec171ad951599. 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/USHM22138444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91673f9f9b9984ed28b286c649bf61b7b47efce0e6d8bda38c9dac636d67059d. 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/USHM22138445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7811e6279b98118fb38879d7977a41f1bdf618b54e52ff26cdc03a2c17da35. 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/USHM22138448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc3fa62afe42f923b73f77645f545994d53b107d3059596533c7fb62ab12e22. 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/USHM22138450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb787048666686d6f339443278beb82eddc43dc9d0451facc618b32eef47590ef. 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/USHM22138452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1599f84f6d25ac176a953d194daf7f5c1aba99a07ce00def5a6b87cec572db03. 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/TCACY1759605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b761a6ec976de4f1347947c59da27ed8b24d2f23022144800a7688f8b2e01d. 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/TCACY1759530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e37e8f91b658ad758299d8d63b7c40ea350ba1d9aeaf4a65ee0cbf8dbe1837. 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/TCACY1776021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa36fb17e5bdaf9c03edb77a9f7dc67659e70880a51961363e2fa76ebdf8e2ed. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCACY1759607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71671a0fd101cce9aa5f8977acd181b70c21d789875d0e261360234c8e04438a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCACY1759618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c060087f0bad3453098f492001e56bf702557b29b6591f66770687484e61c1. 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/USUTV1400410.
La Original Banda El Limón de Salvador Lizárraga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f6dcf774d29697f275e880f6651bde320d4343ca95ab976097f601df9a49c4. 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/USUTV1400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b64e1452f95514b0c04d124be6518291a78a59ffdcb1d84163bd5569770a0f. 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/USUTV1400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ee57c2b05f6d6f5d6867a4be8c98a810f85635bb270d940a47dceeb3e26d0e. 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/USUTV1400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea77f4bcf5a96875d7f6f1bcd95b4c0f8b1f3279bfa33e3e86a67700ca2f6be4. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/US6D70900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ee7e27a80b44b1b119d73192366b5f464475cf52c776974ae7bad57a8c1931. 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/US6D70900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd129efdc89c366cf04f6e98f646e4e6cf0d76b5b4a5c49860c1c1fae96a23855. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US6D70900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f3e719847ce1e490e690b2fc14cddc10c90a32245447f5a22769dde178acd4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWFP2302134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce230e084745f4f5e31bf30edbf966372a986b461b076f31724c96ef4ceeaa8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTB52378850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aec80c522d50ff490cc228e16407a68555641baa9ff2c0bd8b8e07a90b0488d. 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/QZPLR2301091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a91d25085a87c948220f27e5bffebd5e8d984f212c5f982b3f470da38f546f9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMBZ92318940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f2fb33a5d2206c8b9d8a8fe4a05584c501018f81cf4d3675fceab2d391ab04. 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/QM6P42310613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573514e2bca5487b1104e00b2886f208f7296944ee870b67da736b6a471385bd. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZNWQ2250758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783f66dbce632728bc19fed41e183649d0b259dab0c8414612f935b87db12166. 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/USLZJ2263257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfe930246923bb5d2710b0e1bddcc48c6b7fe80e1c0c64ffc1fa16bf9b10e39. 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/USLZJ2263270.
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.
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 0xcecb931e2c0f2a20e1cf7cb2bc6cba8f6033d1da055b60f58ecd572804b62105. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHN72117725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a24a0576821c79f74e451136a9eb1d0ccb51f91a63665b463da87824f18262. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/ITFZY2000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be22043a757b0f9e8dfa14d6190db0cb62162951d135e409d450f7224ee97ec. 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/TCAEC1931009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a91e6b0a4e11c5087b69212061b08e1642f395e0a0d0ec127ce9a9165a6a7c. 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/TCADP1859599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b42d12540d33785789c48e0034d2a2f223ae887a66d1d1f14df08d761d59a6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCADL1863880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718a6b05870ad986ee54969d4d1824de5cea738c2da40af59ec99ebbe975bfdd. 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/TCAEP2073702.