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 0x8edf710502482cdc80add101ad873d34a4d196de236a54ce331a3188a333177a. 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/c360f886-8a21-4a3e-8429-f439084a70ef.json and https://artists.proofprofile.net/proofs/artist/c360f886-8a21-4a3e-8429-f439084a70ef.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 0x3a694a2f5fc6f8b16bf1768a75333d22519fcde82d37b857c685ae2b02801460. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/ES80S1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1c77c50e014917a648b4cd4e38ee537ff721244d2913b6e748df421224307. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ES80S1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9175c9b460943098314242ab07e3e4d39700e69bd54fe811c53b117b1b2034. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ESA011932314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58d5f51133f305536e2da69ae0e88e08dbfed0e76ac078b277dcb6dcd5e93d3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES25E1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e79db665080c604ddb49d677915ba85ee2ccec988155d660a5b034507269c3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ES25E2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03030755522e0b925954767c85024672570a98e66980d6138b797e74cf6c5ac. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ES25E2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d179a68f334363f8472b6dac7a8638f663449a7ef0eb4ace9e74b0d4ff484ab. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES25E2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f4691817235a4bd79b731885dee81ccfefc73b3d509969a305ebc3aea5163. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/ES25E2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66d89e49de8873361846ac50975d26e1ee4e122b0041b04d41780226cb3a03. 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/ES25E2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2623a616ca5cd84c7c16a69d377ccc538c6297894f6cd8fa0f8dfad67fa01d89. 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/ES25E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92743d7645a66117652800d324736f817e150dbfb47e1f8371f22ad794ea60c3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ES25E2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840922e02eecf4bb3e28de6a16476007e9eb221b6a8e22afddb7b3895bb201f3. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCAGH2271558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67efcfb7a72974e68b868847a993a91ff370afd55c8253b36c855c1068e5dcf. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES71G1631871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570da8cda8e6e1cbe3fc8c2dfe56ed96250bca046615e6158ffe4446b6d99ef9. 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/NLRD52018918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936400bf6428e31ae584729ad52b48264c3f5cf18f1b72abc5bf0b0fa8e3930f. 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/SE6XY2302634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641b436962b06a4f326c92717693cdca69278ca55b4b0b83b03c4f23c45ab338. 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/SE6TI2350690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8df0ecc557fc2e230b26d9ce49c16941663730109220ee1306eabeb4c4089b6. 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/QZTVM2352330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612177de256cd3b530952b5011a71666a40614561f59833bf1c9ae435722749e. 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/ES25E2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00147722ffe1f13e7b3c0d2fad16b0cd67e89efb53a7d0a7be6089f54bbf70d1. 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/ES80S1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca68d901463758de6e80bde38ef2ad1977d7a6a6c5e80ee92b041f82a4a3bb7. 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/ES25E1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f94a46517a22e16b1540696d855a519ad4536af48864bee11f2ad788a9be34. 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/ES6102423504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612177de256cd3b530952b5011a71666a40614561f59833bf1c9ae435722749e. 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/ES25E2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e57d436612b5be9301047d71d089a7d69b4c544547f363d3129b6e97b29a8e4. 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/NLRD52017437.