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 0xfadee617c457204f924d8b892968e2630e2d46bdf476b1765207967f9bcc7d74. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9da84e1c-7f3a-49b6-883e-14ce145bb0aa.json and https://artists.proofprofile.net/proofs/artist/9da84e1c-7f3a-49b6-883e-14ce145bb0aa.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 0x5d7f290b91501a3a9d245e7087d00d0fe6574399c69c075d579905982b44005f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFQ2315950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e514d21b829392db2814c1edfe17afcab12a4933d7116b970232d677e36ae5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFQ2315954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0029591fd50c047f6ecad972d04b44dd418c89fad79ba7821f753a28250c05. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:07:21Z), 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/QZWFQ2315955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250673e2036be8eeb573c0929fed501af917159f973167e175589846b22719a7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWFQ2453267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cc40bbe7c3df6d38285250a1cac562abb15c0dff0fdfda1c6ed076803a40b1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:32Z), 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/QZK6F2511310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dcb35c6db161bd1b43ef2553c460394521bbddca4b259f857beb96b771bb22. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:09Z), 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/QZNWS2549202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f332683c4367937054edc29addc01a8c5905d02fc55774cd6ac9d776f76fe41. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFH2585676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7ae8013c7a91e71454972b4161cdf22cdbe4ada6d08cf08eacb04b4d6bc49. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFH2585678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65100975f523602464d28a8fdd667375eda8bd2e8870fca507c8250089f2aa6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFH2585679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938abbb1ce288aff682eaf5ddbf78fde67cf29816a721a99b2777ab17cde187c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZWFH2585680.