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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bbe845512984d6092ac321b081d6f0db981925fb9110d5676168dbc9734bd9. 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/deb64e4b-48da-44fe-9135-d34b4d7d1dc1.json and https://artists.proofprofile.net/proofs/artist/deb64e4b-48da-44fe-9135-d34b4d7d1dc1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa2f0c55d7c0c060203c71cfc800397b92aa51c4940ba52b595016fb1f4e401. 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/TWDK58807011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f6f6496dfd4ece87df88d5d6d7cb441f32d1b96f19c19948398da526338e76. 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/TWDK58807012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa0daa820bc0f8642e81994bdbb5c4eabeb0e009ae269ee7f09d9c81efe7d95. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TWDK58807013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c15ed4d51b7f189b4d602279a11cc8ca17fea953e6a26679a8ad3e00ddf3ed2. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TWDK58807014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16338b4c9d5d2348be27a7f72f17ec7d6a94797d44cb97aa5d61edc7679ff9bc. 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/TWDK58807016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d77ef5cb8e47ecc9a3bfdab9b581efcec9429ada6e34066ef5231f28d24f4d. 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/TWDK58807017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b10b63f22e321913ddf6b30c75d0290f5f4fa2c0f3386686d4af975e4e4dd6. 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/TWDK58807018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9369b5b26bdcd762688c10272a83a53de05ad3dbbdc2794323ab89346a6150ca. 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/TWDK58807020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48129e80386b06cfebbafd529e5370de98ab94f57df2de81feedc7533b2fbafc. 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/TWDK58907001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cad0ebc7fd251309e643e50a957b48799c7cd195869d398d2ff8ec27676170. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TWDK58907002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087677dda795ae5bbd632759d6bf732f537a33764f89be53f2476cf3a3ebdfea. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/TWDK58907003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe567962190adb500bf4cc89ae44303b396ab11dac53fcb4aa732c4bad73ff425. 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/TWDK58907006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8d397344299028b12f01c9f175e134b3cbfe12abe2688ba7da468d68d55d82. 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/TWDK58907007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5381f7d7034efec71baa0865172b69f25c9be128305bb7a01f91c4d5d0b9da. 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/TWDK58907011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6080bba93e8b8ffea039bde5851704858637ac93b99bac5ea57cb4141ea472. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TWDK59007001.