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 0xe583da75c90c009e92d8b2384805cedd74473a11cccd96bb08e34e02316aa26c. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/113b1249-6408-4f72-81ac-d8548c39ff13.json and https://artists.proofprofile.net/proofs/artist/113b1249-6408-4f72-81ac-d8548c39ff13.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 0xe0790ba924747157f88e29bbc008175015caa365059d102339c648d1ef17d104. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM6N22005233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1dea326f549ecda59f3eb955939b91bc0d89fcc5817f03b353170707004026. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:57Z), 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/QM6N22005231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e0cc17518bfcd95357540907acceab8273563cbb49144916ccc8a5e3a74066. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6N22005234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dad935aa1cf92ecdc62e9eb759c18a3509447cf9abfddb50f07badfc920871. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QM6N22005229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a73729f60871e27053963385bdcd45570cead51daccf63d86aea2482770721. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QM6N22005230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc4ef63fcb3fa30d648c60a970e6b53ea7f99320ab9e7fdd75cfb327c7f1681. 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/QM6P42175878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe918ec96a4e539961d2363298310fa6139f2df10bce3fb7c4443c70dccfa647b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMDA62190254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275438c327e446ba594ad48ea3f918e8ca5fdf2771d8a910b9a0f6f2921d1ee7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:32Z), 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/QMDA62190255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f01f1382d53e549a45c69e0c7ce8672482a67c7c4f8766eca2f961c5796a8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:40Z), 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/QMDA62190256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7505c4330bd49adc47ca574be0b472f86e88e9dde0e6c76122ee2afb87a92a28. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:46:08Z), 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/QMDA62190257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6cc6680768380d176da46f0b832be4f4920bc190a614ef64817c64d96f91f7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA62190258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cadb4c1b19c56e7d38b24e7be3b62360cbb7b2efe25f1660cc422793d8005e0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMDA62190259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe556fa7dad773171ffbc8f599888b2126d0bb06226fe97f7e76e01d9690b17. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:18:27Z), 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/QMDA62190260.