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 0x716ce1ea545bac782f28df6719edcbeb0c1e2c3daa7ab64ce898b99c6c2d50a8. 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/bdc3b7de-2cf8-4504-a9ba-616deb20be63.json and https://artists.proofprofile.net/proofs/artist/bdc3b7de-2cf8-4504-a9ba-616deb20be63.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 0x9c596bd469d827f222352bbc67ba5f10ebba8f598db46f6f36300f9723568701. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZVEM2381248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b6ef00a96ac6846369dcf9d02396e32e761563c348499409c7f1fc8f34a248. 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/QZVEM2381249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7c7cd740d414300dec8e1147bca7dc72480cb47f874a9554b5eded6ccd0eef. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZVEM2381250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a93573ba6fcdaae2af52db08a4ea51d1648cc4fe9a7d5cac47bc54bad319da. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZVEM2381251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b2bec42328a5c58708aa40ff1f694b23b55bdf9e75dae91c5cd11bfdfaa60. 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/QZVEM2381252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec6c9f5d3be77764f9fc0b6f29deea46344b7119eb21e2ffaa628de89295e09. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZVEM2381253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a1824f76302edd3d8abfb91e86d303ad8b02e4ffe2e563f94cc2672637522e. 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/QZVEM2381254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6afea47bc376084c38feef05429885d66e28525b56e9dfffceacf7870d5bf2f. 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/QZVEM2381255.
If You Do Not Surrender, May the Limbs Rot and Die
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87d26fedd2f57e055cd97e00eb6ef414b3eeaf79d19437058869d6957955104. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZVEM2381256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d7320a65154abc577749d1a5ac167559bfcd8171b32b0af38d0f7777a4e0a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZVEM2381257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36a293dc60d5ef987145d464d32697fb729436678bda16d0c9058f8259d4029. 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/QZVEM2381258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aee87641f54ebb009053e0fe666a0909573e168a0dec9fe98d4671aa3c01f13. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZVEM2381259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c350e3ccf2bb8080cf7e3fe05cfc63e9fa6641c1723d91e7881e28e9eae2f5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZVEM2381260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b3e8f5293774d0d8f5fd6c957a000f8443eb985d81cec5f94fd5c9afa68aa0. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZVEM2381261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b444c8e2bc41f204679795e3db2296e0e328126461c6b0ff7e51ab800b04e1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZVEM2381262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fd1af314584552608c79c36540fda3d162af0dc974dd7953f43c264b73b43e. 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/QZVEM2381264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfceb3ab89d2830860ee136cfbf07c46a09ec62ea0cada8c83da490538c36ac3. 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/QZVEM2381265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe655cae5505220c38f3e333b84efa15467cf9737e18b9ef421550d286d2dc014. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZVEM2381266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48edf5d5084e388e4eba7d1abe52eb70b2221e54bb5f3207640bba901f4505d. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZVEM2381268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c5e1858a4b290306439162d8cf636841ce3c13536c13fe5959be98491d04ec. 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/QZVEM2381269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935330abdaada8554a4805604f9eafc313645680a479dca9d85a880c3456aab. 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/QZVEM2381271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93e40cf3fb56a7eb43baab78b445b3d75d54172460d138c2d06144b7f2f3779. 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/QZVEM2381273.