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 0x11d865058346a6fcc88b2e4242e5fd2dfd8ee5b8eb963c8fbd5520c672e59abe. 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/b0cf3322-a5b1-492a-8663-13a5c166cbaf.json and https://artists.proofprofile.net/proofs/artist/b0cf3322-a5b1-492a-8663-13a5c166cbaf.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 0xaaa75ead4f6062b117f6fba7f713760fd2b46dc7e1e160a711c0be7b4c2f6fc1. 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/QZNJV2085895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f60363a4cf61e0b3b2776d7a0a4dd8fa5ffc4fcdf80bf5d8f63978eda60a495. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCQVW2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaea4b6ac3fed55be34e261be6072743ef29d5b0648b12f802309d5667d83003. 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/BXSSW2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20cb5bbd5c13ef18777b1cd1e97456020d13b888b05fd0e39e78e436b034391. 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/BXSSW2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6b42908badc296dc78904e99e8f02c26deebc548c43ce46a7109f160604188. 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/BXSSW2400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833975d84478f9a869256130570b98c2d8103c791862c11f34ac4ff7308c5d51. 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/BXSSW2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1e01d5b4aac2ba09ac8316fc5da27ed2dbdb3b2305ac4c16738d808b06d025. 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/BXSSW2400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6b9edc04a1cccf683b1f1c5aa8ac1c3d3a7b7b8ab0026d9f938ac63cff777f. 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/BXSSW2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71cd8193cb46fd7fa21c605d27aa27264585b2f67d8615f1dd29ad62614228b. 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/BXSSW2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1a08b613ab46081b6376e5733de54a2879134ca53f34177dea6a741bd75de0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXSSW2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80701471495232770926fb9ab0a8a305c509241eec123df7974cb1ea81bc3479. 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/BXSSW2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7df9d1457f8fec4de6eb3b020784048e1d37dce417cfaf1586d5d156bd2fa4. 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/BXSSW2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b48ae5ae5d82a6da522219fe5ba8d0584049a937b68bbc35d3165548582f97. 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/BXAT62400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b48ae5ae5d82a6da522219fe5ba8d0584049a937b68bbc35d3165548582f97. 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/BXAT62400037.