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 0x4b974fc839cf10bdd0d9a3244e91e26c70047c89a86d85f5891fa1134f5a6216. 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/11a136b1-c0b5-482d-9068-2805c4d3d328.json and https://artists.proofprofile.net/proofs/artist/11a136b1-c0b5-482d-9068-2805c4d3d328.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 0xddb31f3c27402a79a107e6192687003dfb567281fc62d3ec7b87853f9804dcec. 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/QZHZ41941299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1a14bee0295ee249264a775ad00826b88a1a20656f5a7aba638b22d6bbba55. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHZ32030149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21f6fd7d18aa91a090719dc52c1bd31d73902b5209684fd17bccaa29f936702. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHZ62066353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3765a776adf62d48adfd89270408a68a2734090b142137887e29c43b0a162fdc. 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/QZFYW2155907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86395d1303e45371a537ebcfdc3d40ff131369ce07afb3d2a94ff8765e05afe1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHZ52174409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf5d78f0286f83503575502b28e3c740cc66232c000a3f052130efbbf28e591. 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/QZNJV2172242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910a5c2812e25c85b510d3c1a1e6d5e26db4e5e51940cec0721a2c333337399b. 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/QZNWY2190807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131756e3d9d1b5c24b0e31fa37ef4b1b5b3df9aae99998daed5eb2c37ae46ac6. 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/QZNJY2124106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113d42b9821d3dbb6e0fba4ebf198a710ade02741dc56569f88869200f28aca1. 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/QZHZ42243640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a80d18baf12d2ab4d9bafb5f2ad0e77a9db27616bf7e2c693ecceba98bb088. 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/QZHZ52240032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184f131ae4518d46a38f0ed119b49745ee380e4e11f49f34d695129d0f62009c. 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/QZK6H2251701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45ad80ba7cd28e1c00c43829910392b42db268cb40a4b52c16487e422040a78. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZMEP2254029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80475288cf11426a1075efb4c8743b5def2b9a9a08aae6b1a1208d9523dd75f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZMEM2214667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f3a078a8fb13d7aa2cb49bf42bfecf7232a6cc47a2b3c4d9587a390f3dd0a0. 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/QZNJX2000486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc8ae6baadadd727b8c371f4f3253bd87e9ff350112cf5c13b5e6de4f89ed2a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZMEN2219181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c7a2921f146afaebeac53fbbb45df4fe0cb5216d775457095e540911b77158. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWX2283276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0c269722ac59a1f965ef7bfa2882cdc593ea5f140535f92b1bb80fbb281768. 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/QZTAY2282084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee4a4d42c827224b1b2a7eaa1491ce467dd02b7fa1067caf7495ee95f36ca2d. 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/QZES72305387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9b95ef9acd83eb2d1a21bf4b3293f18339f8eed3d1147b21b47f305797d3b6. 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/QZES72305388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0f595d22b9071715633c95a7037452222d2a2d8f7424e5ef9f2ab0bdeb1abf. 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/QZES72305389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cc22f8a0e622c85a4af5f31a2132a4621a615b58bbaf3fce479d7c7d5c1878. 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/QZES72305391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61d1c2586eae3911a140ade9f685f17ab605b2271b1b53625f9943610536890. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES72305392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634d2f7fb18a4a01c4195465a8929df703828505e3e098c1d79d5358fc481fa1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAW2374897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed9736c609846a2499278929dc1c3b92b385ef11496e9848ed44bb1a4b4c696. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB92338863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc893fc12934ca564c3f6a8a226379080651b4fe0f1bdff636b1958893397e195. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZTB92335982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a2ef8de27b11fe82f15a2f3554943e368f05d930b336d47b15d08931449a84. 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/QZTBA2337038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baf00fe92291091dbea4b12ff1491a7f5d6876c8885870e39a84bddb5440180. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTBA2364829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1549e8f8c746bf3570d633c44c45f202916d22b2d2c89ad9d66db886320e0b9. 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/QZTBA2381997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a55329f40afeb6b9a8cd106d05c84028199eeb1e5fba862ef1c8a75abf1925. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZTB82330429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe49caa3c30c2a71007d3e23bc80ca333e7f3a859c9eb46f23ca449158c1bd1e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZTBF2300536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256975b66a99c4fc8426f2f61b97f95fef3ea1cd85773ca46c73fcd247f4352d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB32443075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca88d2f43bf2c4b4fac1b86a2a9b7b5ef7b034cc8f775d514a61487bca2e43b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB62467844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0304d1beba1c6268fd41353a3bc68e9034f0a832ed6f90f62d3a73191c3700c5. 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/QZTB62467845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ff9fa6f79fde939d74d3c16a32f428b454a64464d805dd6d18479675310d8c. 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/QZZ7P2424750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09483778244bf1e3bafc6b45c47c8174e26c0729da0f0d2f845ed25a192dd711. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAU2516656.