thumb|right|The red gills of this common carp are visibly exposed as a result of a gill flap birth defect. A gill () is a specialized respiratory organ that many aquatic animals use for aquatic gas ex
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 0xf90f06fdc50b1223c7b3f7fe881a626b84474670d7515b45f702a6cc4e80071e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cafbb88e-4ad5-4ef2-9d24-e9afa3f3d6b2.json and https://artists.proofprofile.net/proofs/artist/cafbb88e-4ad5-4ef2-9d24-e9afa3f3d6b2.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 0x366dfe45cc21bcd92120ceb67a26d498718c4367c1443f72489287f510c84647. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62178555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7793d427bcfe221ecf53ef596dcf3b4bbf6f6ae8647a99ed2cbac6bec1bef381. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNA2271559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fabf2c7bacc099c6d75b2b3dd24079c584545023eda68f92f576fb7cdb4ff2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:04Z), 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/VNA092201591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88c1e159cabe90885f42ac5ecb6e4211134ad672b83e7ce5716fcedb01fa8d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA092201592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca63a9869f7cf804fc89682851941c92a7b0e5c1aac340fcc2d5507c68d842d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2372938.
Mashup Money Bag - Bảo Sao (live at GENfest 23)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57590ad6d21bf7ff78c0c1b5859a8e8bdb468bcf049aedc26e4b7537e5f5e61c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:16Z), 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/VNA092303662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceef6f668ea0eee57a2c8de75afb908540be1bf18af4b485c3353affd5d7bb8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:57:18Z), 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/VNA092303663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50c3e618655b7080e31d42f8caa8c86c20fa56d0aac41315ab294ce0c98e97b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/VNA092303664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f73683c069bde03da4c47ecbe7cc1c6c503bedc20a8d58a0d53de632f46707. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA092303665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ab7b1655bcf33a402d72c18a38f695a31b36578b698571cef0d98010e50b6e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/VNA092303667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf4a03d87a61c92a0fe44512a3f9786079f8344fe65f22e5901a4048c8cfd3c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/VNA092303668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5809bbc8c067007b77f4a53290809164ca3d21e5dbb4e589597a91705f0a63. 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/VNA092303669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894740fcd6949c6a2129ce0f12110aaf70b7ba092a41d829344642e17c4fb878. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/VNA092401959.
Tiền Là Chi - Remix (Mcredit x OCEAN MOB)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e11b626e18c8ebe0427ed212928655d27ba21517d3098b4314f71fada10cbb9. 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/QM4TW2302883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6181d9e2a22e364775360c8e3bdd97c1ac854bd7dd26563489337831e7aefb14. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFMF2219839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0624906fdf6ff32b8d27b7f637001fa3530383e2b6e868ca61662c3e1aa2bca. 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/VNA112000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf26e99cee36478563b68ebbdf9e2afef899503d946aeec2d4cf995e22d4c44. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA112000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dbe9b66dec080e1e87bfb9884564e9631edb173034f65780bcd9d4e89c8ecf. 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/VNA112000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5445b8c2ea9703612dc978a014904ca55873ac8c079f1cf4f7c24c2ebe344adf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2504859.