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 0x21e0e2d35696fe7f990b4b7ea1f583673c3a83f3c5273cd4e31b016b4e3ef57a. 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/3e3d656b-0ea0-44d1-9999-756ad160b91d.json and https://artists.proofprofile.net/proofs/artist/3e3d656b-0ea0-44d1-9999-756ad160b91d.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 0x28a0ca8189934511720dd1ac321f2035b137ec69864bf4d6fc5e4e96296505d0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZES72287505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f566ffc206190a78dc4c7ac87eb1453039c660bd819a3635ef46ab2a848a17. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR1A92204535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f6ce45601a4ffd092c2f3504d7d813d9ee27c85e913f0f7266876dce5bf2d9. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR9W12309247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6535bafc298715d3fd974477942990f9fa15260cd87f1291fa0551703866cee. 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/FR9W12339640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9a8e3f8930a3d04232df6cdfe17cbe181ecfe59ef4269c1df2510ba1ac8825. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR9W12339639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55973a04e4b08276aa54a2eb1f9456445e4577e460705a2ae254e2502169c3c2. 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/FR9W12417112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42423c09c162ee41cf3be242afb891237c045334b8099961b1897c6bb244bb2e. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/FR9W12417122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ee5f0c7e28ed5b4e37421df828b14b786efcd2f4763ad23fa58d7ed3888d1f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12417123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba43ac5f9449b83c89fca4d17363fb0aca58dde370ca913cd184fae2cea36d3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR9W12417120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b69babc91c7624692def9a81c5e22edbc4690898fd00a799bd4c9740dccf724. 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/FR1A92404914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f5f060103181e70facccab0b5294323bdbe1233171f931f18f2aeca63910c3. 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/FR9W12506227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50660360dd7a9ad0de9746d9da13bddfcd897b5d916a54ba42a1942dfc3d5b30. 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/FR9W12506228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c70c41f950129436e3d35bd281207738e68252614d3941d3d55929a0ded947. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FR9W12502541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c094149cfa154bec82093e8cf9b7bf3e3d7dccbc6ede5da3ac5472f7d1bc3df. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FR9W12506229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f910145eea00cd5ba5e4dbd37593529ab8f63adc6773a5e7ee4be8f11d9478. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR9W12467991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6172fad6909f632302cdd59a455f7cdfb7e77790712227d02b37aadebbc9c767. 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/FR9W12506230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8233484da33eca842d39a562c0551cebb91881ed10dcaa8284482eb3412842e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR9W12465204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c70c41f950129436e3d35bd281207738e68252614d3941d3d55929a0ded947. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12502541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f910145eea00cd5ba5e4dbd37593529ab8f63adc6773a5e7ee4be8f11d9478. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FR9W12467991.