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 0xa802eeead64b0f085c7eccd959673065f484b3e6cf9ac411b60a1e297e2740ad. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a1c86de-dba3-4693-8c74-b555b957f47b.json and https://artists.proofprofile.net/proofs/artist/5a1c86de-dba3-4693-8c74-b555b957f47b.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 0xe03b3df8f9587d5cf421c867cc55699b3889c3b6781f50f7b85c4ce754ff7bba. 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/US7VG1730032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3a266ba18c1f7d0e9605cdcc940bcfa25b7e0250699efb4f52b55494bc2e59. 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/US7VG1730033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec38891252e60ed102b4a8372600c245dba88f6fc764a14e0079720a202fe394. 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/US7VG1730035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2d1003dc08160d863ec8715a4e146bc66ecdc6f93d67c96546da66e4bda4cd. 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/US7VG1730037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c7d2561e3a0880a4dd0702ae90b61beb48ac93481320e9ae12f287fb7bd3ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1730038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c69c95c6fddf292d2c3355a15323cadce445dfc2c10de2637960399c1a74108. 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/US7VG1730040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9544910a0a3cb72095dc655919be6b94a785f1712d8235fadc303d636ef1764. 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/US7VG1730030.
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 0x8d8fbabe7be8584003a0dbca099f0ef6cfb15319a89997dad0a886b9cd63e29e. 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/US7VG1730031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c0aab21741b197d3ce6c8647ba8e9e322404a909a553ca183617baddea3dfe. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US7VG1730034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d10476459eddf736118727cdbbbf36741d8cc1ef62bc32dfa630bead811cdc2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US7VG1730036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca49075ef6375e6585c6b3ceff37b7179583aa1569b3361994cb2b6eb05a0ae. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US7VG1730042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dadf720b529b36bb58bdb39c6153ca1ff93ddf678b9eaf829aa0a3455379f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ52133764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd56ec8dc09baa987ea6605182bb48240a62c3deca8d97df58fb34eeb0f46f2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ52133772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec976f2c5df01b2d8c8307b2f494758849de8b99685aaec75e80dc12e9887afc. 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/QZHZ52133756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9ba196d001b89823250011f512307fec1813b8ecfc68c90828665df00650df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ52133769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41df1cc57c7e9ae8b3ab3d2b547989ca3f3c06bb66d05eac0ead9bce86b636b9. 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/BX1TU1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3810a098a828b64d260734acd90f886404000a9d181e9881df79145669dce50c. 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/US7VG1942815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b849369bd233f33a84099b38e42642d0f6be83a8de755a5607e7da9fc7b51a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1942816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf4977df0fb77fb27a20bf838751bd1ceb154867c3316d270c786101ae10e3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1942817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef8b6ab0f04cbb2991016238e5c7040a360d83dde3e49df2f34a7aa5a835a23. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:03:05Z), 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/US7VG1942814.