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 0xea36b4e3f8d4d7b29de57efe42cbad0083c78a3c08cc3afd8c02833aadbca01e. 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/9e5ee6a2-4859-45c8-9753-1ae36182eb9c.json and https://artists.proofprofile.net/proofs/artist/9e5ee6a2-4859-45c8-9753-1ae36182eb9c.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 0x0bf47f9edc1f1382d9065bdddba8b843462cca04d9f7cd6676b7a8c64f9ba2e0. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GBMJG1608083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5b13c2628205a5ae0ef345601e1da43c16b1f810aa06e8bc08a6c612bc07a5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBMJG1701483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721749e7c1c045cb24abd47fad84d9cd5bb4c0bd36facbf333d6417fbcb7047d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GBMJG1701934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cec944296deb7245415287abf56c72fefdbe2720f34b34e632b327d649f2543. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBMJG2009309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba62c8cff5cd46efdcc7575e0cbc7e92a79f26b3bd64b2dcf63527d8373c89. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBMJG2011159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445e93d0f099eaf741bbdf86a588ae938b056260c51462af6e7b909ed66fe897. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/GBMJG2013200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975390ac3058ea8b0fd219aca203990c045689b8e33eb458387562e937d0ce6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBMJG2018967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa064b42e85ce19b3d8f01240421189813452a288835f439d26eb8d80751b4519. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBMJG2021301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05e2a19e523eec2c0a4d21c6dd006b26606dc31e0dacb599f3d382a10e871af. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBMJG2023111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e6f50b6738958ab0a3f3f824b667b96c09281effc83f14e0833ce5f253f6c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBMJG2125036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf03dca4236af984350610126307da41621c93d3d9167a1f4f9810c0516e07d5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBMJG2206263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd345485326029f5ac431f2320517c16008ec618bc31decbe35e18a30cbdc90. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBMJG2211702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e12d04455c850f43848cc4f34557c67576ba98f41823b13abb2378fdd14c7f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBMJG2217345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca455e8f5d80c241d45a0d3071b7630fe1cc5c8a460c1e905ed449c8dc615f16. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GBMJG2216936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8f8c8be1c432ebd7c8c1b694b1e3a16f30a8e97abc152ff1b85cb5ded9fd8a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBMJG2216937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf03dca4236af984350610126307da41621c93d3d9167a1f4f9810c0516e07d5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBMJG2206263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd345485326029f5ac431f2320517c16008ec618bc31decbe35e18a30cbdc90. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBMJG2211702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1601404a21dc6419034561ac6dc45f37847655af87fe7b525502b1ce2e1982. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMJG2317072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf402c4c61bf5194daa51f1fbb359815c34ddb9792d9794dc837dbc8b63a45287. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBMJG2319213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1601404a21dc6419034561ac6dc45f37847655af87fe7b525502b1ce2e1982. 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/GBMJG2317072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbfc2c4516f16c66738cfad0f427461a34f287e042b07912a2a2e9582cbe593. 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/GBMJG2227762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855dd1c4f3ed31d82c2cfdbb7f97d6fb03ba318a2049bb7ef3bc4a1106cd2650. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/GBMJG2323413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf402c4c61bf5194daa51f1fbb359815c34ddb9792d9794dc837dbc8b63a45287. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/GBMJG2319213.
Descalzos (Banda Sonora Original de la Película)