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 0xd7396ab934b3ddbbbe683c317adb4a82ae72eb776c3bd21f0f1988c0c55da485. 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/7de248d2-c2a7-4368-9153-74e62e0126ca.json and https://artists.proofprofile.net/proofs/artist/7de248d2-c2a7-4368-9153-74e62e0126ca.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 0x67a499621b309c884b9a9a906d0e2f9f96bad044bdcd25c70544892ca744468e. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBSMU0019621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40a68eb80db0727c944627e7f2c7e44fb0f7fcd2fe02454dc4cc3ead473303f. 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/GBSMU0019590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af758d380ccb96375c814cda6dd30c759a38416f54dec5d0aff9868e413c642. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX5MY2107929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87ba396b8d8bf2b57ff7efd7d1670b53cf02c905cbf83e65841606a591ed511. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZAKB2343526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70070ba961e3c4be208455ef396b3b1d00f15d3c610d5a6b07dd31b145b0cf8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZAKB2369958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb771d45555c7788172759f47ff34bf826140028e43a9491567fc40ba57058833. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZAKB2401465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ce59f6356378eb00f57ca790ea8f72816fbd71de3d60e90bfa10f9a7040c94. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZAKB2406602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e9a74f976c9b1e1e853bb7a5aa7e7cf9f085fc525f132a67650d9300fe2d2a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZAKB2454681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a7ff4a90563c1c4b74a2b2b6a94809b4d0feb0153525dc0340f40bfc8b6117. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:57Z), 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/QZAKB2517835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5bba2f66f07a0aa17104f0731f35f0c974dfad278cd466666facabbf6a168. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:28Z), 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/QZAKB2522687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04437e5256a6156f558a21b4120df180c108576130fe9db71597fc023119c2e7. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZAKB2532506.