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 0x5247719ae00cbedbfebe9e0403fb03f9a8e2d1c53bc6d0c66532338757e4d288. 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/2e1c6711-54d8-4ee6-98b4-9334857140f6.json and https://artists.proofprofile.net/proofs/artist/2e1c6711-54d8-4ee6-98b4-9334857140f6.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 0x46856d282e7eae62770ecb0a5eb34e450d1ea6dfca57910a6ecec9fa4e506e4b. 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/QZWFV2477122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af982cf00eb5ee42e1c51e99818725774c1382c66355d90b324c4b8e409a360. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDY42536254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2d475a2d8bb50844ebb7b2a6bf06f213c384ccb5d866f2fd0503b8fa594e0b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWU2477076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aae5df9d70306b865082063d5a50792189139314facb208c028d31a72b7b8d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2435373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aae5df9d70306b865082063d5a50792189139314facb208c028d31a72b7b8d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPLR2435373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6827e5087b9f5a453bae3f628abf35789a3ad630301aacd53c9344707554a72. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/QZK6M2512906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6ac14a13a6dc447813430bdbf205e279e6a86ce902f90e82fb3b2c9afb282d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT3EX2458487.
The Silent Goodbye\Mourn Death In Silence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21078f973aac0843dd195760ec54e3cc0884dd73d533427a226c75757659383. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6M2512900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3921b078e9edd9015edd7f3fe5634afbb5652f5c9b277422a9dbded65c54cdb5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZK6M2512901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05a4c0f59c20df1f9dd5af1b3c5ad00b4a2df331592978aea30da1953faae07. 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/QZK6M2529961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b53fc9c6055609233b2e3fa469e86e174889f25fb6f88b0c4bae4a618b0d2. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6M2532070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c45ff480b6066932f2bb1f922144fb709a411a1cdece2c7b96ee1b270645578. 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/QZK6M2532071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd895116aba10fcaf58c293f6887625929e62a7139cee66490852d4fe5f351a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6M2534502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3911103bf0236b74bd6ea12101a348c5237fe480c46d9e392684819038f62186. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F42434319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92077dc892e099a0f6f0cef874544bf02b0128bd9fdc77068e58747e1d01d105. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EX2467857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f70d8f3115b38a860cf4bec32f77d3e0ce977168c4c49e26df7305420812c. 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/QZWFV2590409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf753746cb26fa6c88e4529877c15be161db0301cb088c14288d091817c39c84d. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZWFV2590410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4c959ae71e398769b48e5c2c313245f88779a9c09263999e4263616e9c2809. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFV2590412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8409fc42de07f363d7d9fbad7a9c7257f9efae4d45ef65eb8e1d760a6a9b3bc. 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/QZWFV2590416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92077dc892e099a0f6f0cef874544bf02b0128bd9fdc77068e58747e1d01d105. 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/QT3EX2467857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fdabf9ab6a34b938c15407af875efbaa106e96081e31bc0ef139da70f2e3d9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6H2558680.