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 0x9269c0ad7b744f90915a6815d72de9de81f356451d3637abe2d65c8f488f8096. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43c257ea-ff0e-4efe-8743-f29e738dc05a.json and https://artists.proofprofile.net/proofs/artist/43c257ea-ff0e-4efe-8743-f29e738dc05a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fantastico (Altijd Larstig & Rob Gasd’rop x Kruzo Remix)
Fantastico - Altijd Larstig & Rob Gasd’rop x Kruzo Remix
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 0x1890078388e49209bb802737817f43c0ce5a5391873bbffdd21ede4271cbf89c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLUM72201099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74811640f97066e217a5fdad470d96cfaa2a83cb62388ce46b78c0cf402bdb7. 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/NLA802400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366281a6f2931013fa43b92a339829e00639ae08aaccf762e84608bc567c3b38. 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/NLA802400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709c467684e2327e60e6e48047ba5f1615d04118e98612ce009702dbf6339548. 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/NLA802400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80828340d26d17b1610c0c59bc03ee83603b63698e3a442c30f011be91a0e6c. 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/NLA802400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74811640f97066e217a5fdad470d96cfaa2a83cb62388ce46b78c0cf402bdb7. 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/NLA802400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeabdee31a92ac1fdb4c017f45c69aca342fcb60a6b5425849b981a9121c5bc8. 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/NLA802400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c36d7c20cb8705296b1d14f07bae6f6fc537da8b4a7c0e56eb5e23f5f305016. 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/NL9HH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a01730a7d754a28ce2d23bd74ca87cbae6cb6d0921ea1dde1cc85a4fb443f. 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/NLUM72301353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbb852251b2bc3527ebfd2168260981d1e2d65374909fee9c52bdb6a909ab3e. 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/NLSB72300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ca4af6996c98f9c7b74d3a96a9fa50a9c41942b1d032fe6070116de0a0d097. 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/NLSB72300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016959afc2efcc6e616dda7f4f0eb49e5e4e3eb1b9a76949f419c4ff677d2ec2. 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/NLSB72300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634d857961546f9d3fac6b295538e7e2304f4506df24d3d81810dc195a7a6b0a. 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/NLSB72300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e757f7d1eb9e410fcbf22dadadc2e24812c8a40d0426f11811c67b2f5a47933. 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/NLSB72300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5c4f4eef76ad194e2e02aa9c01b62ec964d2f310724c6298383cf535b4d324. 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/NLUM72200998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4337f12f10ec939398955ad1ca0fada3a2ba1f24d258a410a8051a2da7427c11. 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/QZK6H2267560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8cc2d5fb15397c589e22270d732104246d389f73682ebb6cf9d9c7fc84893. 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/QZFZ72234382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564c9ea00d76e53da7eb7b3750a3f09a96f4e43c88b649a0932dd03a356c43b4. 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/QZNWQ2173714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba23fe2f96c7facc7e6fe6dbb9074bd80a0e373e252b2638a64c3d6b01cddbbd. 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/QZNWQ2172272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9575b60e75e4dd9ff9c49a6dfc106ef1ab3191c4c38c11127e25982d3c1ab2. 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/QZFZ32148129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5043d9bb80eec70bcdc31ae672fea2173be034fe9b054648725b70c4d28d629e. 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/QZFZ32041931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0153e2e7109ae4d9fa899cc8e22021a21c44acf078b9d191e5fd8fd0c797a31. 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/QZFYZ2028391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6794c29cd58c9752726d6315a5cff84bbe92635d02e0a545535c4a9f894f66be. 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/QZHNC1972679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d86cad2f0d63fb36f7742d44505f7740713ee41501e2683eb7eccc97d0cdf1a. 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/QZFZ71958473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cafb0871c5da6dba68b165fffb139d889afa3c6a5d94f8060cd62839b36f1a. 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/NLSB72300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5c4f4eef76ad194e2e02aa9c01b62ec964d2f310724c6298383cf535b4d324. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLUM72200998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0204bea084b6364b074226f058c25923acc161c1b0dd6732e19717413a6c76. 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/USUM70965169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4bd20ec558d5c34ded3256568ed7a5ac0aaf55910b40c455966ba1dbcb4044. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USUM72215262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ce2e7b85d0bc6398e70cab3bf1110c75b8db4567d7682109aec1aafd55aa5. 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/GBUM72203666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff78f34f8c07dd80a5778e65f6bdeb449ae8b7e3cd030f784298b0dbfc5c38. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLKK11400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c346403076a850d35abc816464db5b5e2ce24a3ba1daccc96a3fed42772a8. 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/USUM72210379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb916319f65ed40a56babdf978c13d6c9343258e748d70103de17c9154a335f04. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBUM71604557.