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 0x666c13c84052cfe0d69f7490cb010da56359341151bb117d2c644b11fbf498b1. 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/fdfb4273-3f01-42b7-ba8f-5983ce29a4c4.json and https://artists.proofprofile.net/proofs/artist/fdfb4273-3f01-42b7-ba8f-5983ce29a4c4.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 0x2b13ace0e00917fe912472aa9eb7f3c419c6d52cad0b79d4b7de2fdcc5dd1370. 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/US38Y2420355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601518b1763859cd5284fb11f7487cfd23e17e35216dca087bc1881b2a352f31. 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/INY132400559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbefc5edbc8ef3d15b0f864f8dffeca0e69037a8e79e7ea0ec0be27fe947c561. 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/INL232453377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f371a3af35e7095995084f8cb260fd3f5750245fbd18bad6a362a2e726d98d. 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/INL232452626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d85d987352f08af6aa5ffe07ea515f0a29e6d29896f58a03605f6008567fc7. 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/ING642403173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877df994b04c3b4c8ff2a73423f3e63fd3319ec0857d7e48ad1b72749a4b6040. 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/INY132400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f619882d1909b69296d4883234348c6d18575fc734ccd6b6082d1f173722fb. 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/ING642402111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31577bc882abf6a95bcb7e14d7a483f0c1fb04d1fe0525cd09f2311856f32475. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INY132400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f0a34acd55f3d42f767d75cab54c16bca8f335f367f36b1b2f29fc648085c4. 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/INA1I2311700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59b4d52e734991275c4edcb1475db4a83dd85c103b074edb1cddbe4862cbd0c. 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/INY132300936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e976b54411689d03d8b92f3a5793b5f64325dcff26ff41087fba23a45c10bc3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/INR4T2300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc8384196e7ffc00c64382d8ff2cb921972cd74a09cd2bd6eb5f2fbd3d5cc95. 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/INP852301112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72083a0370926a816928b8a0b80c7407e1fb1848a71b9ee32daacf152ec5c4f0. 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/INY132300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a66a9b1ba6c6731ec17893f6a3d2c1fa2d0c0eb20db3db1e34ce9af65640d7. 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/INS182301483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f99a082d9f72384a815a7094f4cce32f4075404c7a9a8486ce0b275b4f172c. 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/INP852303101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d957b66a7fa0962f10b4d26f45f3f55ad5677f44d27d45d50b9194a800d6d0. 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/INS182301481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcc18561f6003e7a9e09155372826c5536da46902c1f005d47568d7883a73b6. 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/DGA082382150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6eeae853868decb4d4c9dc85ce7aec51dd1b4e600476776568b4f71bf91611. 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/DGA082382148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3cb8ef6d97f6b9681bac58945d294fad2986b27c2895983562355c3bda706. 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/DGA082382163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143f13667a224af94f51f73728f1a24dee9c2d275dc1f1734fbe2796a6fa1af8. 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/DGA082358576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570091a12b225d6af3519c8278ec58f819b79511181ef7b35e7107532090dca7. 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/INS182301482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb5cad6acd6943aeff558dcd900b9294f44f84b25e4114e4073b9111bca7a0f. 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/INP852303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7440d2787a23afcdb4ba06ecdc04d07f5cb4ae0e91273b1a3b63db0b3a3e7908. 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/DGA062387478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd85cdc17a57c605a2e9bae5b9b19c19a70ca92b12466ddd105407db9261e83. 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/INS182301480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523c7653a1c6b56f56d1bae49ddb2a63abd419e089df0d51393ece9fba41349c. 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/FRX872396920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3898ba33f0cb3697d9aebd19677a9b82d6e5b9942886e8a77f8c3cd3b83f75cd. 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/INS182301474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9cdee37b590f6023331c51dda19028e964313363c465f7fe16e17a1d4a1a12. 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/FRX452382128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70e1025fad9a6fac556fcf9fe10ac8c0db2ac4fe168e5c76b3a824b4704581e. 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/FR96X2343758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42870180f4f49b553c0ab6ccdc270fc689dbacd3c031181dbdb91bdd7c5009. 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/FRX452233504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b10e68e06f55eb9a69e5f49838206a0a33c0918c4bed005701a2d5c6eeaeb4f. 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/FRX762207316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0a880f545641222f2ad8c1630934667e291a0066ef6a58ce2c40ef1217d25. 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/FR2X42232925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c998207a1d57b4e83095974fce441795d810426615bc6231b4e6f476cd09520. 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/FR10S2208338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8c16d90159cbf86878e4b6e075d51477b75c46db6eef7ed62c8689767095f2. 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/FRX872136048.