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 0xa929d758c1a867a3ed5672d21aa1545d47c939c0ff2f12b2c7f5d43737e38a93. 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/d8bfc24e-789f-41e9-9ce8-8aecfdddd365.json and https://artists.proofprofile.net/proofs/artist/d8bfc24e-789f-41e9-9ce8-8aecfdddd365.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 0xd7d548481c271bb0468057468f05dbcb479e85cb51b8dda5e4d6d283d9181c8a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN62143938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c2cc11ef67beba18fa79f83cd6801d7ab1518985e1f4061a7df3a0c09793b1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB82496676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d1293fbc993ebb24a4c21f662189a8e1114832070c5824359b791369b99658. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZTAU2443043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49f9c7e16c462f0cd005a100ff387712805b42be40c67e0ff564ea1400b6733. 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/QZWFQ2483267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb26e4bddcf1a0eb1a4911b0340fbe7592484864e875d1332a70f746692461. 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/QZWFQ2483268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf933a61b85fa445d286bfdcd793bd84b3c0cf5d25fb0816f1181fdefba294c75. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:34Z), 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/QZWFQ2483269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaced58ef8e6854b9dcc731a92b313ac7d6f44c2b2b850baf0468037f089453ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFQ2483270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba4ab805f12b0a3fe339a2f31bc7cbff31c46162b6eaa08edaacff35472acf7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:06:20Z), 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/QZWFQ2483271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b962311d67ec6bdf298316422178dd17f36e36eb16e0a7c6ddc51e164e3eb. 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/QZWFQ2483272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb29bcec2ad51903d69b9cc74af6f89d0e4f39b1de2d20a7a543c06392d2c025. 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/QZNWT2522823.