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 0x5324558a324c8f8728b0f48a82a4cfcdbf032e847454b2da9bb9f81518f9ce7a. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/366902e2-5870-4908-a5fb-951be798a4f7.json and https://artists.proofprofile.net/proofs/artist/366902e2-5870-4908-a5fb-951be798a4f7.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 0x3b4158ba69abf5b897358141841e44913de647b7dc28dfcfbacfb48da01df75d. 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/QZWFR2362061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c7f846f278013718fc5699ef52c6e6d92b55754a39e9043321929cb4db86ae. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZES72331773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b759f9651e0a68b65432c146a1342b48eb49652b824797247967e022bacda5c. 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/QZRP42210403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7f3e53fd0a2c28866312dc15a33bb40462da7861867fec79c9747ccff943f2. 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/QZWFK2330281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989117232b3ba6ec4d9cf1bd87eaadd24240fbae4ec3bce98bc9d7aafb5b4d3. 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/QZK6N2403332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f773a28a1ca176cb27b4928ceae770b2bcec50aa0d7c75306a2427dd66691f8. 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/QZK6N2403333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2440c9a0d22c0e5bfd166db8efeff9eace4a8c43ef0caf5286d21f9cee0c0b. 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/QZWFQ2359051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f4bd748f4db594262ba75632e85525e692d15d8ade6923d979f9ddfb9a54d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZK6N2403334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b27e566d806697aa2854c0db85ebd3487c59ee6c3be76255a5a917349c592. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6N2403335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200768b9dd211598c245f6602a210972864c10fa07273f961e197e2008c006ed. 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/QZK6N2403336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a32cc7789de064698a929bd69f05e432392e28725b03a56ef57ba491b776f8e. 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/QZHN92406241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7238bb12e563a0c96032af165748ab6d45dbc3b1d3bad13ae925c12321c4365c. 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/QZDA72488522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeacad10464074e4c39f11a195dc18dc519c1cca500b5ce1ee01ffbf0de184e9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFK2382492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bca567d2b3359bdfadbb19504467e7278bf63cba1135010320690dc0e8ed64d. 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/QZHN52409177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716a34b6ff1980e9954c772af8fc6a4ed0fbf80e6725e57b9c5decd5ce287b39. 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/QZTAS2289096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1573d23f28d8b2a4daacc92ebb9d12b0c2ce1720513b72ba701f71a173bc0d36. 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/QZTAS2289097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f6ac1016d5eee1fb1549d64af19c773dfb394ca86f45391d7baba4e58c11e. 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/QZDA62295075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aebd281c8009b6c0b2f3d2210e1b40b15c48ae8733f8ffa85fe00e66c42381. 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/QZFYZ2297766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9501bfdc2cc515b2fb9f8a2d850842244bfadd82135359f50d42053aef0921. 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/QZHNC2221466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980166140e7c42eafeee2c052a28a8f2053373e76c18de2c4db2a1b3785fbf2. 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/QZMEN2288821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb26a2c252cf18001f0bf0ecb7ddb6f1a7d4104e5b72cb7fcb71590e8263fc89. 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/QZTAS2289098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0a2fa6b5f039ace68253c55a404b06bc595f04bf100776615a760fbce2135c. 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/QZTAS2289099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa090fbedf377d62fd4747c69cbc8618735d1606f431cf5411bdc5bf521b90b7e. 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/QZES82289459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a2cb15b6a6679a265724f9522a3cdd3559dd9cc17dcfb3b4d9f686d4dd4316. 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/QZK6K2233223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985eb43922fbe38bf72d60904488120c540198345bcbd27af629b84ba972eed7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWR2222486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d3ff73ba39c728109cdd0650fd8bc2daefaaabc36eeed710f38710227472ac. 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/QZRP42233459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1451e39eddf72b22024fe8559185fb1e82505caf56cee73ac2c915289deaa8cc. 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/QZTAS2289100.