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 0xab0bea3a5d29aabdd6cbbdbd2014130fc45229b6fdaac1ebb888365cd425cc4a. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d992dd1c-ae81-49b4-9470-10ae0eebc2d5.json and https://artists.proofprofile.net/proofs/artist/d992dd1c-ae81-49b4-9470-10ae0eebc2d5.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 0xa94ac3ee95c4381ba48a7735e778e27cd06c6fa7c88ce8709aa963c4afae4972. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPZ2406160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489981da58db8cde89aa88fa4dc9c01a49e6f78df5cb447fadc6ae6e308767e2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPA2443638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa566b599dc5dd3cbb4d1291b4ffe9beaf10ecfb4cf88558123a5a8372d3f7015. 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/TCJPA2443639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce154ff5f1846a5b29967963b494cb6b009e8f0ec18771367b77d044197ee0ab. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:06Z), 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/TCJPA2443642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f10a84cc58e2e8c91db595c60d19f12ecadc0acebcfd8628bb853b55a60993. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPA2443645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b0aa2f2b70f8cacc283ccd6c5502e7219660f44273499ae1210592fba6c719. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPF2535153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1f08c6b217cfa4b9c25a563d2d0a36589f50aa6ecdedbaeff2d49bb46ebf4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPF2535166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2724125bf578573e460665f75e5c3877856a3f0b55dd6283bbb19de1f4537fef. 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/TCJPF2532986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c725f69059a96e655eb5b752a7b3fc51eb8c7356fe62e2610c4ed407194606a. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:00:14Z), 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/TCJPF2535173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf82597689bf26d3fe34cf8b5c714d9d337a162cee2ed331ed7d6f2df86b4af4. 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/QT66J2585949.