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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760f91f298d015979a4cd92ac1ac361ded9aca0ae713ef1e30832aa384360866. 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/1336a980-a0b2-4288-8d79-07ecfbb13ca8.json and https://artists.proofprofile.net/proofs/artist/1336a980-a0b2-4288-8d79-07ecfbb13ca8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa788ba5c0dd983a5811f500026af7c13404dfe0db307421571b9688471e761c2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHZ62048781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d992634e8d48d3e88e888ebafe48f11bc04a403f80535a0c5d8b5dbe374c839. 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/QZNJV2053038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5434bcfa6e39c0a71c04c3787cb9dc83d6c493dd7bd56c219b8f5a3e6ba5c7d7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFYX2154749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90108df2df569f8c50b8da884080d8631520581df9cd0610c533b075ffbe046b. 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/QZK6H2178908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c87db89f79e1ae10e4a059dfd2b7bebcb7e66019cb75f9bee5cf57fad26e408. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:51Z), 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/QZNWW2112445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb5868dc086252bfb77fbf59e45d7c981d0566cd6f94897c043c91faf8a6224. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJW2085996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d8a093e2a86850c7832b85ee29086e3a3b0311c2bca3c131b6189ca55f5f77. 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/TCAHE2319144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc190fc92909439e573482a5f607134d0e551130f08cc32a713a412e75ceeae93. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:24:57Z), 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/QZTB42361568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d53b2107da0a3fc01f8937f0d6b0c5400f7a41212d75b991ff625d06efe380. 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/QZWFG2313567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0e5c754ba5fd73af99ad9e132a201c19a65a9d404fe377639c7c40f393c670. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES52411885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0304cb14abaa158f9d34a3c0691ec93ca908c1757148b1f053fe57f678ec5c78. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN82452326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db2ceae5a90e6d202c04cf8617c8ae4d877ad686bbde7136ebf01e31a3d429. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFU2502133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b30d4c23b958dfc716870ca64d3976190d0aa25800fed924a8119ae1071821e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:38:13Z), 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/QZWFU2502134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad30e0d338ff63bc0e35e4233898a3f7082c5a7eb80abca76e6a15786e5961f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFU2502135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902c56480645d9c6664fdb9fbef8f1dfc7618485aa1ea8c9c388a81412f8bdc1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFU2502137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855669083e8ca84d24b697429681958914574eed540fedaca5376351d51245fa. 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/QZTB82476109.