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 0x8e5799954e7415c02912afde69d53afebfb8090cbbb678917f946b901f1871d0. 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/248868a2-f8b7-4468-ba54-86dbb88c95f7.json and https://artists.proofprofile.net/proofs/artist/248868a2-f8b7-4468-ba54-86dbb88c95f7.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 0xb673d5d50ed63efcfb1ee63b49087db97c8887c8418a83241bbc99b84fc86cd9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFT2481884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb5b70cb668ebd181de398c012bc39b162a997222cc7a408a8d75cc0ad5a27d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLR2480536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb5b70cb668ebd181de398c012bc39b162a997222cc7a408a8d75cc0ad5a27d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLR2480536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24469d721bc391f88e712fca510c785ec6f2fe623336a1b74f76ff2e11f95a18. 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/QZTB22447175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd24ac7be3e07f08d1b8b55b33a2410ab85a7df30ca3ada4c81ca935126737c6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTBA2492435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d39ead60d5b9b7c0de9259bcfe90aabcf04b5daf06275ad9e536a6f82ec20df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ772421616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb673d5d50ed63efcfb1ee63b49087db97c8887c8418a83241bbc99b84fc86cd9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFT2481884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24469d721bc391f88e712fca510c785ec6f2fe623336a1b74f76ff2e11f95a18. 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/QZTB22447175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd24ac7be3e07f08d1b8b55b33a2410ab85a7df30ca3ada4c81ca935126737c6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:20Z), 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/QZTBA2492435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea46264f457620e9c5619ba368fce214fe6198b0c5774027fa8cb646bd7d675. 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/QT3F32412302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb5650cc87bd5604519b821c3ed5daa951cacf477e3223091df5e8469ea4a1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:55Z), 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/QZNWZ2552886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4155461e246ec08d50d0fef7a8ed799f1b881a4cff919920d2de9af9408761d9. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZES52596958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4155461e246ec08d50d0fef7a8ed799f1b881a4cff919920d2de9af9408761d9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:49Z), 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/QZES52596958.