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 0x2e582bd1a2b6caaa1e71866d49b498275db73497e7f167b1bdef06458d3fe91f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9b75f02-d502-4664-a52c-7c7c572baca1.json and https://artists.proofprofile.net/proofs/artist/a9b75f02-d502-4664-a52c-7c7c572baca1.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 0x91975e1bf8c51cb7f572a3bfa1f69cf9e0c0c480b92e9233c89d90189c14deb8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:15Z), 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/CZA381505208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c3362e419c67d54b740e49663fcb2f776cea62e30ade390a775481fbb916c5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CZA381505210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1914c4c9c181e89e198b7c12046ee714a5a0bf2c08296580bf5785b547a6c9f. 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/CZA381505214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2085074bc347e38f2bec0a360aa7af3613a0c76ead024bcc7e562cb21e75322e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA210001903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93970a1c135dd0f2bd885cb0e54a6aae380424e91e0f474acf941cdb8d569298. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA210001908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe6e00186a6c5e67fb975caf0808261f84bf9f58885fb8b150724c9747338e5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CZA210300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8380ed294b51ef440f959b4e48c86420cd7ffbfed3dfb5c653107073308b4a2a. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/CZA210300272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f2c98b3451718b3e86177cf7ba2c647126965ae37dc307579f02f584f4ce39. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CZA210300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f47ad8bccc4d67cd093ecc31257681bdb645bfbee948e0b5ee3ef33efc0b1f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CZA210800953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a25324903cc9b38d0d06a0f1df09e7559abc774ddcb6c9dde4866e576b3357. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA210800955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6c9f31a9401d41df94d0034431a3efdf9426769b2b8a79c4c1933335a91f6a. 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/CZA168376999.