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 0xaba450c223596e22d527c005795e2e50dc42695efa625c26611941545e2d6625. 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/1849456c-1102-42fa-b60f-53dd196bcaab.json and https://artists.proofprofile.net/proofs/artist/1849456c-1102-42fa-b60f-53dd196bcaab.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 0x64091f88bf1e024f4e517dba01f3f5e6e4059fb8c59eaff6ca93778f8e2b66bf. 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/TWHG32300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90440d744078ff766d6e61bfe0a433b3a6a32738621b2b186f5e35528fd393e6. 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/TWU712204111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3032e085d574bc9568376a2ad900bee37fe8754a8d0a82f5a02592f306aaebea. 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/TWHG32400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dce1fe2f62561f280067b8b40074b0eda6bf89870f5f0e3b3db7a91816ba25. 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/TWHG32400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e09a113d213cc61a560b8ae9c8b5e260cc163134f33148a43235acd47e2e58. 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/TWHG32400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a59fdf8afa42fc8c8f773e29a529b35e5bc02b117ec4df663e56e835466539. 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/TWHG32400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb815128f41156a05a1b6a2102ea24ddec58230bebc87918e2af007a7c095ffd. 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/TWHG32400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee02e77a61627271893badb212c0e53491e5c3a75529c4806c34bbf96eb8c7. 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/TWHG32400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee418bf5c0a8a8b396fc8805c4703913d66951239e65ef9dc2be3d09eb6c3ee. 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/TWHG32400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab93626abe5fd1f03ae802553b97e736c21e917af823649d13bb1dd2c840c3a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWHG32400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceef0b2c028f92b22614bafb13190a6b0c27c65ab5c06896094f28ee83d6562. 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/TWHG32400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42a8be74060ea9b0ed5df8068bfe4f5e7da2de131bee23d0b2e2663363a245f. 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/TWHG32400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb463486b01cec70237091056196594e6944c89bc813c7ad9b7a547592931e5ca. 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/TWHG32400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13860d7dcc5ddc5e5e45774262c502ea49fc648772fe2bf7a7663645e44d5cbc. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:07:34Z), 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/TWHG32400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c2b99154d4825263ed9ed9bfee8d72490bbe94377673d3bbf532f8da934ba4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:30Z), 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/TWHG32400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5804309255a2cbccace5cc54361f24e247d784dd946b2081a95b6789ab1d9eb9. 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/TWHG32400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a814fd65caaa13040ad6d5a5279e6fbe3826a4b9d3c6268c81631194f4a9b61. 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/TWHG32200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d56d1c0619dc98f3bd31310e1aa8354ed0af31d9386a5ab710e3b01f8cf7e8. 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/TWHG32200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa220b55d4a6264cdd5b92e8f1ba2df4cca004cdee75fb58c0a3f318a9c4344f. 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/TWHG32200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d615406e06a7cdb3941aabd15d7bc7ddceff75bdf22ff1bc75fd7b847a7ccb6. 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/TWHG32200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da17a628ddda2f6c3ee1f9eaecaa3609f3e64e7606641d4ecec50d88c3d1f78. 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/TWHG32200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7856fedd15b735836be6c6504b99b71303d710e1565f68da6712d8b3146a6c0e. 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/TWHG32200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f240bf1053897a7c56e92d80df45d4914f8ddd8d09fe5e645af5488e08d44. 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/TWHG32200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1839651d644958086eecc9b70a6b304243c1417a54b325fbd92567bee8d3f716. 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/TWHG32200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c0f2216584fb1164166d2780ffdb2e318d88e9fb21ff69b7a9f4decd5555cb. 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/TWU712203131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e16edbec6902953e6814f784b1301375e437c20e196f2b985c4e7380a2186f. 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/TWU712203136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1393e8dc0088f9cb6a6893ba4e8f1f72f5963706dc16d9b0be2b259d312dffe. 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/TWHG32100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e78e58bf21e1f6a7dc409718a3161e1d48bb25d4f38513e6c0291469b84266. 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/TWHG32400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716219e65a12d2349b13e9409236e19556db87450753c4eb1dd8dec6e0b3b033. 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/TWHG32400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4127342332aa75cf2bbaa8a1fcfb75b7537d0212dda543053624deea5eaf8ad. 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/TWHG32400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c922ce3772742c5b2fd540f9d602023b868dec9d29d87647f269f0540a7bbe1. 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/TWHG32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b918f358617b782d7d0b41f2533be65f7718888659b4acc81f3d14d271fb301. 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/TWHG32200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e05b481adc342eaf36c3df4e35785700126081761c96a25c288fd5ef91fb58. 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/TWHG32100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dba0a667ff2cd7b28728e872357251931ca8e8d3d8a801ca1288659dbec5f6. 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/TWHG32100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43725ef650651edbe13bdba531de0b6fbf87104195497ec733f86a3f67cd18c2. 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/FR10S2103530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863289bd0b0584c746c92d27ec4eb29d86e84c1262de9012de6beaf0222fb414. 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/TWHG32200009.