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 0x6197a7d7415092bca50bebc26f0887a497d4cfdd3bbc11f8629f5e72c2e9c33e. 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/1ae62b71-21a1-4786-adad-740694d408db.json and https://artists.proofprofile.net/proofs/artist/1ae62b71-21a1-4786-adad-740694d408db.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 0xc263a18b3e7cafa86a71f224108bccf1209a31519bb992e78a9fe59c8f541875. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZNB82024559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173c153526e068047f58d3e5db748783fa64f9f150b1aa26429f11fbe0c8bfb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZNB82024560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0860c8af789323e0ee78063b6a1f45d1329a326ab8aadb22d6974dcf380e878d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNMT2054498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f66e4d05b4af5cde6ee648193767c2ecf40235313db1db22ecd8339a648c2. 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/QZJG52198179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4983de338cf8ebc17fb7ac400aa7b62e5d23f427ea7c6bb09b6a07ea91c45b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZNMZ2134467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45976de0f2a1746371e71e95fbee2744beecdc473df6576223473a6b537a5ac2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZL382248300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266d9851454b6177b4f7b85fcd3a5036858b7c5d6451a00f75549af01409382a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZLL92264015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81c688d7503001ae576020bb056ba6aca4ad899014c1d735d37e794c6d532ee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMWW2246666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8412bf9357234b53d1906431f7e43f6857d20d49d0a312ea13a92e7908214f08. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMWW2246674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efe68d8c9efbb7a1cd7ea9c8e2b4278db7103de28e987e368eb2c3b0a56d8c5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNMV2267702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791c5086237a1bfb9d30c13969b42099b8bc3254b6e03a5a0b64ad2488d3e837. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZMEV2304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d9a78a84ed0ce5bc07387188c8081f7d85a5193059b402b14b3ff33307425. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEV2304004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b08bd37b4afaac859239e1f8cfde776375f73170a7feaf40fbecf80cb0a940. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZMEV2304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc4b860e899054002643dfdeb67b9d5d910a4209f6e54aaaa891f5f12560ffc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNB82338029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dea5aad794ebd199092a4489c52177110462a2ad8a9baf302e63f7ea65bf60. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNB82338032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49236e8bbb9cf47c2761486efb652122ded2e20b940791cda4d05a01174b3c3b. 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/QZNB82338039.