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 0x1841da426bfb10cb32997395b4eda1d456eedb6cbb6cc04cfb17e4d05adb6fb6. 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/0ce1e3dc-c030-4f93-8e02-4964b54e4b44.json and https://artists.proofprofile.net/proofs/artist/0ce1e3dc-c030-4f93-8e02-4964b54e4b44.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 0x9e9f04bbbb9107a43b73af7f3d4166edd7b94eb904bc59d484492b71096d50f6. 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/QM4TX2324313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b01fe3a782f7a4fc84777d4a9ecf59663b99a96d8aece2bc956186e8541bb3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM4TX2324314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fae263199ecc56b26ee7fde0e415a317996820dbaa0423e35565b7a30be1b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM4TX2324315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77534141a7f60d653bbd16b18ce75b2ab1778aa618b5e4c954ff40c7c50cccb. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QM4TX2324316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94bba5b62cb84a03ab90c4df1a3d9d19bbc8448b90288a707f3a5877332c920. 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/QM4TX2324317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd109ce3f037d9da2d1773574463cb5e42349b9e772a19d8be444da3997faef. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM4TX2324319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f48d7d18ac93b22f221ddbc58e2486e3d4858f689bcf902ced9631e68306a1. 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/QM4TX2324320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead51afa49a2416604b3de4a745ac8923a924d739e24b4e769e393f5cd195ab. 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/QM4TX2324321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35022565658c7606a2c6b50f3c5e4b3f47b875afb7f63612ebe5ae0c4c1c4eaf. 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/QM4TX2324322.
Twenty Dollar Enucleation (Love Is Blind)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d02810d3ee889fd87cca8c2a417fdf3370c217def855d135e6c55173bd1ee5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TX2324323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291a8de4ba67205117efc20ceb11ca9aafb929cd1b1046265f6d7d2f00cdd762. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TX2324324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1973abcd1df9ca69d12940304538fcef2b455aa644260b1728087adf51f62293. 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/QM4TX2324325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e761578751f4bc32e1fc5767488f634e97fe13d92070ebcf42ad495fcf40295. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QM4TX2324326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c8d9e9fbcaee081fe186b7c3909c09a5cdd51d4171ce22e66ea9991ff3064. 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/QM4TX2324327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed801eabc4ee70ca4bd489ca79a754f8e1ea8c1cd395a3d26b5571a3c1c92e3d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM4TX2324328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317876448220f06d087efaf6727377d4f5a310155809dff411d61e0779dfd8c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX2324329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a1eaa0735c4b7a9cebd1ec2b4002da6f0a7bafc7cc7b89b5344dd61f80abac. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4TX2324330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e523c9453b677755712ce69104fba2587c47b7690a21e31a15d3d8d5567206a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TX2324331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe1e13c4b7e848febd1e1d2e6c40f7e8d09c9d729327c031f5fe61ad9382c8. 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/QM4TX2324332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1db545b442cd233e66e4803d13039cada005d6f31b98ef4a1d74b2142f81645. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TX2324333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82f5d32aa27b1efe7e0635259db39dc7b1402a7a1c6075a2da552cc6d50589. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TX2324335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7fbab5c32ce6e4667e85afd5e8924a5314b600f4f3be96edb4627f61fdc321. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TX2324336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dcbed5b8153e1d1dfe7c67ee0a117720508a188ae62b9b890d2b5a95c7f6ba. 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/QM4TX2324338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89be056eab32cdb3fa9c1d5fc9596d5508a6f280c21f61c37091bfffdacd54c4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX2324339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fabdf394c833fa320a34f5a281f75b2019f3d0e7d235a5dbd1dd58dd0e08c58. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM4TX2324340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a44aced7c7d1824ae936194787d11ed85a7624e351b5d347f4d42b000d438c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TX2324342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5c34feae0960360b7a02e8a01f295cb71c1f7c9f423b2f6e6d94cf70e7dfc7. 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/QM4TX2324343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9f04bbbb9107a43b73af7f3d4166edd7b94eb904bc59d484492b71096d50f6. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QM4TX2324313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9e84a0d20c82c26c33197c205b5fd88c244a0f9127ecf3e5f5b6e6b407e55f. 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/SEYOK2040047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b987e9fe44542d7917bc226baea00c210a3b29daa3c51ced8ba2200198d2b0c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZ22D2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82670663fe563b5512f02cbac3643469d04a1d02b092ec1b97f2af3b74ef9aa3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZ22D2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a68f36e5510a1de13fd73314166d74cad6b4a4be6389476748bdf147457d54. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ22D2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6df8b5a1302a20ba7694319fb5cb55e0ea7ef658645136de746a8d6af63442. 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/QZ22D2400094.