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 0xf51e2d3b4e56afee54da3aeb306db67a0318bd38654840d0e3739e47a953767f. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bec6a5c6-32a0-4021-b172-fd37a9ea1da0.json and https://artists.proofprofile.net/proofs/artist/bec6a5c6-32a0-4021-b172-fd37a9ea1da0.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 0x28e2f165454864fba1c5b7ffee246a3251e170040246567c538bdc4c8d00d3a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQSQ2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55c8d83c15ae57cce5bcea71855f9d4a865135635d437c966b8ac606e06124c. 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/QZQSQ2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aa95fd5de9a80891684e1d76ce07423703694416b23cefe91cd758afa69b79. 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/QZQSQ2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7249a1ac133aa27de44b65b0ab51d71937b81429d973e4d9677bcd0cafd60c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZQSQ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d4c0f2a0328bca85e025ea5214ad66265a54f36bd10604c01d609cb1bc8974. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZQSQ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2b8e7eabd3cc64964f5d83547891fca1091df1a4483ffa8ca16a6d2d5e2a51. 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/QZQSQ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6ee6e3cc69488388f93e0bbbaeac822e4c4f0d3400eab0f6b45d98e0c2edbe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQSQ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d24a911ec004ce518d4caa4bbbc7f8ba79eab33e94deb9830880573d4b138c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZQSQ2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29e516c70b579b6f19c8985a47bdda82fc417c9c05a8e5d4b67961fddd69762. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZQSQ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7249a1ac133aa27de44b65b0ab51d71937b81429d973e4d9677bcd0cafd60c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQSQ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6ee6e3cc69488388f93e0bbbaeac822e4c4f0d3400eab0f6b45d98e0c2edbe. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZQSQ2100005.