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 0x88e6be308c4baf4e8e553274b573f16255cfc40fc75652fa390e5cb558f34ece. 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/18e7de99-b8e3-4e8f-a638-c9453623d191.json and https://artists.proofprofile.net/proofs/artist/18e7de99-b8e3-4e8f-a638-c9453623d191.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 0xa60a793a361741b6d8c376d1e82b3cb57b32da338f4736d245f826d8bc9adebe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWS2403064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbaffc010ea207d62bacf4d4e2a739f97ae4c972a1c5f0cd8d884f3f9589a56. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHNC2445095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6c5efebb7a31f96464a9ff051b25b5b581dfffefb3201018d87d39e5bcaaa8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWS2403065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e825a145ae5885296480e34d86e02db69fd31c7afd02c04b157bd6df0bbbc36. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA82452602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a9bbdb80b66380a42298e541888ba8e8d0ef99136dccb1ac6e83e62eb93446. 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/QZWFK2303687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264ee10fb00bf5c0ad2b9c891e25cc111eff56a073067450efa3664c1a2c4607. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWS2403067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a25502d9bcc08bdf30820b7e3c248b08baf73b36457b0db4bc3381f681be3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWS2403068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6f453de668a2978485705631430f2f45ad1717d9c095eed7f022eb0e4f3c5f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNC2305372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5785035ea01fdbc3cbe530beebaae17379702759210396a2639b31a96fa56dcc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWV2227327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a171fa160b0b35b5cf1a47e69ab505dfb555acc62450b5709e897b6c2da631c. 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/QZNWV2227329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8163dcc08a999f31335d3b20bfc9eca9693403970728989f42fa1e957d70ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N2266704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb678fbc673b39dbd2f7bacf7af39265a6584bdaa6cfeb5e7fa1bd7ee47bab42d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N2266709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbaffc010ea207d62bacf4d4e2a739f97ae4c972a1c5f0cd8d884f3f9589a56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNC2445095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e825a145ae5885296480e34d86e02db69fd31c7afd02c04b157bd6df0bbbc36. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA82452602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a9bbdb80b66380a42298e541888ba8e8d0ef99136dccb1ac6e83e62eb93446. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFK2303687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6f453de668a2978485705631430f2f45ad1717d9c095eed7f022eb0e4f3c5f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNC2305372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d4afa6fa8df6f5efc3f26f79290b07c7043f769c169d30e8926655107c1f66. 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/QZTB52201691.