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 0xc1a8ca7c459ef9b9d8bb4a3338a6d51069f72dd29fcbe39ca44ed015be92218a. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddf0c191-f740-4ad2-b494-b891eb3a8cbd.json and https://artists.proofprofile.net/proofs/artist/ddf0c191-f740-4ad2-b494-b891eb3a8cbd.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 0x13086275568ba0ebc59fbbccf5cde2d05ab0bc5c7f62372fee39d22caab13ffa. 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/TCAIL2448296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65460e0f27a1c1aca2dd721b749dad150059d138d747d85f25acfb4956e8060. 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/TCAIM2472372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535c386d88ef677cea892a8581290d13667b3497b5f01cf0363af77b4f98040b. 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/TCAIM2473346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb4c530af5d0f96a71996289cd0840b2a6bd9839c7c42306cbcbd749dfeccd2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCAIL2473767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24138d0405bbc2bb62473de5817bf100608871e5933342693cfcf787fdcd38a. 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/TCAIL2477001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eae7ad0c4a3528bfafd1cb1db16048a2800bd229ae91c8b5986c77e68d85cd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBMA22493051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c93406235c15fc71b3d8fc4387c6f9e807f9a61105c21882ccb62a6dfba9068. 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/GBMA22492999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a14a90346533bbc1170f004c91609cab305c4fc05747c9ad98286c5c6d9c574. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBMA22496085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36520aabdbc5b0e9565ee0f5a99144b5827344c9e8a12296827ee9ec5e29121. 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/GBMA22496077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa69b249dd7d8ea3dec224bab9e9867821a6097ef38d3453dc3c086274638e55. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBMA22496400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774db831ba614384f40f44c448a0d43f3273369bd92703a4aedc3616f6a7246. 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/GBMA22350470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe234a30dd3aa2ad2b1f699987f8d089f464714d4bf6fd0a35ff612d31b2bf4ef. 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/GBMA22350468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e0f13c83877f439d94e19109dccb7bfdace456b908bb7b86d8d19dece05683. 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/GBMA22350469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dbf16f586ba8d827e76f0a33f2c81435543a96e91cb851ed30afab92990ec6. 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/GBMA22355849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6417e3837e762c8c187bf04ef95727a33260e205267c02da8f5621ca62731aae. 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/GBMA22355767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b13916772ca08e767040f76051840ba2b26ed1e44ddff07077d2da62d19a4c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBMA22358650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916a78638927ab77b384b88e1cce8a78dfe8ee5cd87778f508bb54a1baa6d34e. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GBMA22358652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744eb481b4195513871e2af88ab94c1c7c3561795a13a66b8d676179d6586cc1. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBMA22366537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b57e13becc443a589ced3c5f03e2b295f1dc010e1d26c9e98b49603e8ceecc. 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/GBMA22366752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34befc670873344c87a2a934bc59b58b1faddca16dd409c231c6d8f591e155e0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBMA22370921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032453f7023e529ddd7ed75fbd1f49f6c8dcaccd9c7c360294280d998d391ddd. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/UKXN22521933.