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 0x5d1127f9a8ed655090d2af51d896689010f6b93fd931333f0baee5458e6e2212. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62ef1719-9e1f-4779-a5a9-33d5d7f98fde.json and https://artists.proofprofile.net/proofs/artist/62ef1719-9e1f-4779-a5a9-33d5d7f98fde.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 0x986560fa7032359f40e3290c7b378de4f2c501ea3ea7cb9a58af6a09e5a11598. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6N2145566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c576f5221cfe816118409dd28543dfb9dd2fd68147f7340af90e86922dc6e6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:38Z), 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/QZMER2132984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f2fb6ecf3611b6d432e92a86bd11a281a783c0448219942c7d4ee708a1f92d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:02Z), 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/QZPLS2196094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42c3be467adf11e41a81aaf02c0b1cd7b7fecbaa81295665db148e1599b296e. 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/QZK6J2277946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1773d1defb46a19c895674c3f8fd97527d14183b2cc3f0c8bcd85f7b80b5be. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZNWR2228663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011154cfabc2e7608d4fdf70d22e8ef29522bbf8697fc39ca0dd8b24208a2944. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTAS2255109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc0516a1b52922b64feb2d7a9e2bf3aa3228a431fb2ad2a0d8f15407477e292. 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/QZDA82370072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f560521ad0d46674d71883e29e395b10848a425b3693991eed6afed7c0d7ff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWV2306850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b66f41999c1491fe2ef8e2d31ee06c4129b96ed4ce7ac076bb560167d015ff. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB52365233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d753a87d9a2a8301fcdfcd916c599768ae68145794270fbf4bd3224e5f523. 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/QZWFK2371347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333575bf23a759c4366a9aa1b1fa917c1c2707e12f09188ea27bcd1c31cf00cb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZDA72406527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a771557ebceaf133cda6ca337012c943e2a80756259721baeb61e38f839eb2. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN32496651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcf3af06f644fa03f17ae8885a7184ff79580e67abc36338491cb92abaf8e88. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNWQ2409327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3903cad2551ed1df523e3884faf2cf11200b9bf163018658798a9a8aedd1f1dc. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZTAT2482457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca69af0e16b53b3736a49fed31faa92cb093ca2235ec1105a521deb6c1cb8bc. 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/QZWFL2466962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e1ac91e6b6b1a723eea0d7f15748a0c2560599a61e0b35afbbcda91978ce29. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZZ7S2426442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea26cc2fd80b114e76b7024b74a1a1c7cdf2a1fd7ae1020ac4a30f96eac1c0d1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7M2527609.