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 0x45d6d88199fca640508d4bd1467bd71bf544bbb2d76a5bb85796989b3628c442. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b055c2b7-cdbc-459d-847a-377e32e5bca7.json and https://artists.proofprofile.net/proofs/artist/b055c2b7-cdbc-459d-847a-377e32e5bca7.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 0xe70f9cbb5d41ef38e61059062e21d9ef20f9ce6abb20405c46f8cf10ba3b4b23. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:11Z), 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/QZZ972455303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444a79e2d828fa4991bcccef5a0bfda6b60ff991114a33b0d1a32ab2336b64fb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ972455300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7ace38951fe958e538cef1fece965190eccca67dfd4df76dad3ce1b52fb73f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:56Z), 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/QZZ972455299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe168e3c562b9cfdbd01d4465911cae54f0302bda2358bfa623f75e2cb53a0c58. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:51:23Z), 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/QZZ972455304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9099c67c4de7271ca5f502ab9eaf0617e67b1a2573658f685bf98ff8cd5e8f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ972455302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d5220ee0212db98c9f610beee7abee6a996841365a04b03d224f8f9b3765db. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ972455301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58952ba617ad79d41aeeede3a5ac76b48131c179ff0607256764f2165a234622. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:42Z), 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/QZZ972455305.