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 0x5a46d03f969207dbe02225d132038057205a3f7874247c41b740eb9e2de23083. 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/17968524-a8a4-4115-8b18-d559662d68ad.json and https://artists.proofprofile.net/proofs/artist/17968524-a8a4-4115-8b18-d559662d68ad.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 0xf07b969b14cca0339b6b89097ac9a692c00d7cd3efa0db395d3362ef98674615. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BRWMB1901444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f1ae8808b8bb1304f0171831c699e1aa820ced65af3512dbcbe3976746fb90. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BRCID9400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dcf3d28f377734c4a2383288c9e78ca86144fafd536077c6d740ffa1e43558. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRCID9400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2b3d752541447eef20fc57765d0ffea96db77d12a39075a2a6cf844eb36994. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BRCID9400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a523df934cfd015b4273965a794c35654d55948604575d5ed30b8240a810d73. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRCID9400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f8861290264a7d9054df24ae7b60813fbf82c3118786e7db9fb2b3304f9bb7. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BRCID9400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd6cbdddd0227ce2d625aacb101248f19e088be9f654225174c50aa4047a65d. 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/BRMCA0200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185bb48df9e45a38fc0b76b096049d9fd393a20791dddbaa50b27666ad5cbcbb. 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/BRMCA0200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2963cdd8fa435ef563901e20736002dae8aac6266a585dc408faaf7d5e1b3a6b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BRMCA0200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065bfabb8fab0cb2c22f2bd721f6025c7c6f10eb267648a7ef37ecca75f4cb2b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRMCA0200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffec1fad62ccb78204f5e826a90f7e69130c4ec2d8bd512a3d20e0f79bf5165. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRWMB0600282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a9ef29487c497196921c97fa310c3a4bbd76e81b8cf445c8403a6b5a60d8d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRAA80700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06a2e6d1f723696c62f426095820c3314bbbcbf0a91b366a189a100e942abf0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BRWMB0600284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb768f20495df64ca6f14b903b9578b3ae8ab4892ce3af14bb71e967fff3d430. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/BRWMB0700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9a7ea44e28abf95a30eae471e2233a4704910bfec9c7a4d1a7b37de51b55b9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/BRWMB9702522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271a10613e2b1b2a1be82bd3ca154ddc21be6d938ca06ae5bbec5d4def17c10e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRCID9500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8035567be4c48d100dd20e8368570e455182114ad491608060bee137f6b4031f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X1916680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6fa3dcc6e0f416fa983bc821aaafaf388100b587b4fc517446c9ede48aab1d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BRCID9500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddab17958ac3043e78433f6be29f514d98e9c14db216a10aceeeccbb13db5ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRBMG8800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914819c5ed47b3acb73debcf8dce76068ed9d2414e07a788a81b980bb3749398. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRTAP2101186.