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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6779dd91ba6d3746ea91dad5950c13fa513987f98bc095d9cbbbf900deeee05d. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5635a38d-0a83-43a0-a78b-2111b65ec137.json and https://artists.proofprofile.net/proofs/artist/5635a38d-0a83-43a0-a78b-2111b65ec137.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9314c7704888c64a369230852d642cbd43946b638c89e12087a93cd8756ff1e. 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/ZA5CY1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d52900a95eba00546dca915477d149bd7721efd945aa6005d1374face284aa6. 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/ZA5CY1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71c67b2655c0e3f55bb09eb41e1e309c3a5653c120d5c813eead630b6fe6ff5. 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/ZA5CY1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273598dd400e0bdb880fb53cb5904ca30e6c44359138cb3413ee14bde205104c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA5CY1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc354723ebfdd18f5783be619646412835c020fc241087e7d2665e1838ece67a5. 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/ZA5CY1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38dc02df724e3f4b88ae340b4bf2f85addf32376120229aec56d15e821df38. 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/ZA5CY1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8df4cc4bc5e4fb5c48bd78ef01d51386d97d388612eed30033138d4e09e6d68. 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/ZA5CY1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75adf14995012a8cfa68a8ed2f5d9beb24d5d54e97472062c1aa7c408ef020d. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/ZA5CY1800001.
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 0x410972a6145a6da44b57392862bd919fccfba68ad6f8060e98a0dcebc9566bbc. 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/ZA5CY1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61e725f17c7c1a3a5c22fdf97d56eb2dd01ddeef6375f7e681cb318334b44a3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZA5CY1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548f5aae69ca7bbd9472e4c82fb8e39514e9bec0881fa7aa34a6627381e312af. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ZA5CY1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34894ec9ec0888c0c034e6a423fc31071b0b33e681a882a596db5d8a92992f6. 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/ZA5CY1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fc5487533ad3b23d59fecaea45548cf8f47b2409c05b95db9719636c515dbf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZA5CY1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a016610ca9afb56473e1b0e72a18b5f818e14e44bb99116513d722c913d27. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ZA5CY1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7045b717d1fd1ebef7a0ba82b0e31e878ce817e44afd49be7c4e66ae55584d5e. 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/ZA5CY1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda70ced3b0a280e451dd41e410eaa24d223e85969b99a249ac9c885d593f1392. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ZA5CY1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda17863330ad2c896c1be5e7c9359afe8d82437abfe68781594fc968eb94bd. 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/ZA5CY1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139df0e9c5621556f7999a2c81d8c67e4628f76b5d7acaaf64e1ba8f260fc3ce. 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/ZA5CY1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7453bea55268d367e40f6ea53cfacd214020f1f47309c1e7317e500772c9db3. 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/ZA5CY1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f25323f7cefe63ad6a04d605e11f7ae254853b61849eae5bb0d17db31dc51. 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/ZA5CY1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95060b27126a6769d7508f51c10fc7ed4568ac84d3cf0e9dad7eb4eb9bf709df. 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/ZA5CY1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4014ad59040fe5f19be1beb1a823d9ffb9d3bb1c746d750cfbe85fa2b65405a2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ZA5CY1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982457056069bf2665c82f11f47132095c86ad1691805e97dcaebec3f7e2f50b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZA5CY1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d211edbd3fb81893609004a64ae6daec8000967bf13fb7819ddef89b87080f2. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ZA5CY1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541d96751666d718b468cbd71ee4aa31b9f85c04c2d539576e4c6e6149820aaa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA41S1538376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2b0146290a7d0c7d1abcc85c479848e8617a0926ab70965d5fceb91f738576. 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/TCAIG2419906.