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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99891999fbda04ebd8be599b01870af25753923584d4ad51495a51db16155d0f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
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 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/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 0x0bb2ddddc3ab40cc59d84a7e5e55ffa7d6f3ec1b07c7e66c7c25f94ca3d11d34. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEKM61900577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d497b81f2cc30a6436a0fe63422111f14f391380f2d63fd674898188d2235f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEKM62000687.
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 0x436f77ad0c390eaa4c8bd416dd4f513528be05865b7400c4232d10d8e1460ae4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEKM62000597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d32b7f3fbee6c8cd755682577c0e9dcde8f1026bde21b70a1f2e0697675cd. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEKM62000667.
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 0xd795986b253f85d5c63fe5054eb8327992ff0e271bfbcd5653404b39052e28db. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/DEKM62000369.
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 0xb776037d00c9b8c43b9389bff738dba7944f3857f3a8d3047071aded32a1b062. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTAS2260876.
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 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/QZWFS2550246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e454df94f154cd13e588db85a861e2f8dc1803369bde0346b96882b41dee09. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAGY2371197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52ce3fd65422d43d76778c2b8260601c564fc03403c689416a4c490a07335d3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTAT2128507.