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 0xf0dc3e7643c95bb1fc58a0885cf255f3c6fa64b1073741b42eec2960f416ac39. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/272bd0da-e224-43b1-ad86-b02489ae32c8.json and https://artists.proofprofile.net/proofs/artist/272bd0da-e224-43b1-ad86-b02489ae32c8.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 0x16dd1f6238d5461c3c6df3036a2954491faa6d4484c9bf3b0c11d007cfbf0761. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2516679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa868a6aebde3f8185198795506a9a2723a207cb1a53be4a17f8172b2f8d216. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW2484462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8bc84b5bf4dcde4cb327b3f39bbc63afd82710ace5168aebc7b5543bc83668. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2484463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492e083d15f11946d664e7968afb2ec632fcf25c71b3602b9f033fa62077b3c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW2442663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb332275f18fe01faf3ed913441dd01c16a88064e47bc14fa96f0fa4ef90de69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2304829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d992885c688a47183a558868092cad936679489689d1c263b16958fe66defd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2484461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6795f64e906b41612bff28d6bb2d2970a3ea4cdc11a0bcd2765e658697f2bb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMG2329758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe9ebcde99b46aad5004e2b1dd1710f0ebf1f553cd53fda554459c1e9f1641. 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/QM4TW2484468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492e083d15f11946d664e7968afb2ec632fcf25c71b3602b9f033fa62077b3c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2442663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6795f64e906b41612bff28d6bb2d2970a3ea4cdc11a0bcd2765e658697f2bb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMG2329758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb332275f18fe01faf3ed913441dd01c16a88064e47bc14fa96f0fa4ef90de69. 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/QMFME2304829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9cf6bae69e98427c4a1d11f3a06fc44487b99b241e0e2c80eb0297558c6614. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2312629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ef5dcbf47a0c2ab93c25ab77c540e557ff9c7533f6669af849490839ee17b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2248833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbf3bd3de757535a8768bc8a6a0c3a4adcbac3c0a9bf730e30169443147ba89. 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/QMBZ92278500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026747533d26d86cfc786b750f236498b42cb061ace8a8c9d73c336f5e0b2e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22269214.