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 0xbb00ce002f1d893adaf5db414ec81dd7667792a44d8c61fae4d9d591169093ce. 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/62259ad5-32d8-410f-965b-37109ebac45b.json and https://artists.proofprofile.net/proofs/artist/62259ad5-32d8-410f-965b-37109ebac45b.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 0xa1f2e2fac51f24a0201ac4d96f0e5813a75cf0f7b5c035c82428738f1d140c0b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:51Z), 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/GBSMU6093350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9edef02b603bb4da14c9ca687d5669921a0fd53568d42bad85b23f7002ca700. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBSMU6285514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a08b9c290a7ad1ce19341875df17903f141fb9ffad9eafd09c0be4f38f8568. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/GBSMU6601269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76db431cdf7a8683ec0cc8cbbdcc9e1847584a03593866345021baecc0b865b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFYX2144183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb961ec8a756d1c2d3fefa886ca40d5a6330e009507046356cceeb05a2c39e9bd. 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/GBSMU7194591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d0edf2aebed7588650147fd4e65830f62d1c79e750539b674ec57b54a0c7d7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBSMU7692867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5324a6aa42a3dc330080f53371f9d827f109d0fa0d22140ba38f5350063b4837. 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/QZFYX2144176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd03b56e85814023c9547cae3059fbd09f612f25d287ad39873a25c54f620c1e. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GBSMU8197653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a37466b809673416a3f88464d37a28ed56aa30731812ecac57723d301474bd. 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/QZTB42418349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c0623e6b958d75ae77a4f689984d190a0aa6cecae0c82a76f2bd6ae185d001. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZWFG2426360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf162d061ce325386eabe5d4dcb761d7a8f06bd217ffda49b145b226b613462b. 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/QZTAW2573157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf36caa65f1d7f68455843e65dc142a4a234e16b65caebdc1d4e111b7038c061. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:08:24Z), 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/QZZ7S2569055.