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 0x99891999fbda04ebd8be599b01870af25753923584d4ad51495a51db16155d0f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f327bf89-262a-4dd0-9ba9-4dd4e442e579.json and https://artists.proofprofile.net/proofs/artist/f327bf89-262a-4dd0-9ba9-4dd4e442e579.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 0x10eedfb25a7382382b9a26c2e116aebe0c12efa6dbbd1ab6b53c1632ebe3f677. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA71962777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae7f2739155e3619acfda2448357d5c687c5227e0e175ea3652ec348e942489. 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/DEKM61900480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc0cd2b4bf38d741cd507c3043852152fac5142693368a0686db1c909a2e6ff. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEKM61900391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808758c5809ae0ac8d8ce7b02e75278cea05427e05ac883eedb80e58945ce9ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEKM61900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf600f3872717474339f0b6c9b94a364859b169317f0e784882163d1d398e3869. 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/DEKM62000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40fbb87dec5cbf3884bea524c30e0f21617ea5b2b12ab094b0c850e7b6b3bf. 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/DEKM62000442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d11134dc10ae9d8981ea3b472773f67ddf3b3ab8d8bd2b48c1f75d661f83289. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKM62000549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a4adb1c548c4cbe328c66d801e32f104f24d1a223ee1fe6e1da73fedd9d8f9. 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/DEKM62000390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731ec2e1ab4ae5d3a113120c9330c19cf6f73fcd4025b97def75878caa2ac9d8. 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/QZFZ32374336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad2d8bd034e5474649cdafaa10bc00aeb12ee76cf779cb6b8a8055e6c9abf68. 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/QZES92293510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2419346c0f747727f02aab2526e783e6056680f5a532ca937b7511ed9c280ef. 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/QZNWT2261904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405986622eb50d2ae63b37828bc0414a2a5786dcf9316d6a1a4a7b397373ce64. 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/QZTB82213242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261e8f31fd245b115d185337931a62fe96df54b0d567f6ef6f427dada9ff253d. 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/QZMEP2258736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731ec2e1ab4ae5d3a113120c9330c19cf6f73fcd4025b97def75878caa2ac9d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ32374336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bcacdeac7733372b47d2fb8177c5f474bac3d0037e7af0dfbc6fdedd376b15. 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/QZWFS2550246.