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 0x34d8a08237ba4c73e729af59f78d0fc9ad536c69a8ef45acb1d31f239c9462dc. 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/46a5ce07-11ca-4722-896a-b9e33535e4e8.json and https://artists.proofprofile.net/proofs/artist/46a5ce07-11ca-4722-896a-b9e33535e4e8.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 0xca834d3a530155b86931fa1f32c5a314dd36cd83ba078581b60cf5eaa3251283. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEBL61124997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a31002067f17c2a9a042c01d63245426ba63a43cb3914850918fe56e572afd. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR6V80271191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac2778d50572759a29ff59421bc37c1e48126b5a78714f99f4908191dfd49ee. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:31:13Z), 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/CA6D21000167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5315d115d4e8fb736a6cebc0fe2df33bec03355c98d76da224a9af29cc66a52. 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/TCABP1346555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed543073b13cb233dadb98c9df6ca2ee15b80adee43b54e9b7b8e9ae2cb4e50. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABP1346561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ca2cb83decc7b71250955e36ef9864fd3097a05e74df8992aea43a6938589b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCABU1466809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897b4e72ff2fe6e3803f87bf1140231bdfb47865cddd34b13c115693675b8239. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCACD1502821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c6a9432f5928ee9984d21505e3ac2e2eab0d26144ba7ff2178bc06be5ab9e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA6D21500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499c944a87a991ccefacbb06c87e9a03c6461294c101da1fd6722a5fd9488e12. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CA6D21500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3ff87ada12708653348011cb9ad8362c7b162d282438c5801ac993bfdb2d01. 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/TCADR1854509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0a33d6577f1850b611fcea9494d500370d8f1a3da2a77d5b99b4383f0bde3c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADW1809544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde55d5bea5b614166d98489fcda78ce1599f19d459f43b59909e19f8907b5b23. 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/TCADW1809545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e9efd9ec24e1690519979ae5db072357057a12e4cb1c3d8b22ac148d249a8. 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/CA6D22100558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c67ac90706717d46759e89a9f8498eb557ed5154b2aec1e7695a9b2dd9fd6c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA6D22300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47ffeb841fd8c1cd1744aacf11a9ef3d395772304ccb7006f7d28cd76c336d0. 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/CA6D22000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791e2d6862b6a2b90a957bd33518002056aefb03b9e41581a107e49604eddd15. 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/CA6D22000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1833904b71463aa3ebda426f3570687381b3c08c2cea687a5e9ed874c8b5a86e. 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/GBKPL2087318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023ea05716bfa8eff53740df64785c723c64ec09d1398ea49523b23d02f8f074. 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/CA6D22300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a946acb1064b2d297fb682b7f3abd7d9ad34bbe02ab393e69d8a1bea4e65679. 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/CA6D22000353.