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 0x568db638149fbdce3a29ba0ea637190e4e35f04ac9bb81eb7d1c56fe993ac9da. 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/4b1e2aa9-76ee-4b09-80af-1751f50440aa.json and https://artists.proofprofile.net/proofs/artist/4b1e2aa9-76ee-4b09-80af-1751f50440aa.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 0xe9fd9d5b427fee099856a9fac53f501c5296e3d9e7ec3501f6b6fe3f98ab02f4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CAK471500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a58f7f8fb933edcdb009ce95f189c1bbaba7e94d105c63eeb867fe8d037ba. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:17Z), 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/CAK471500801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d5d347f23db22826a22e67efb942b638904b676c9c814701780e579415643. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/CAK471500802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9448fa1a17fe6d207491eafe3bb51a57bca240462fe8412c1cd7b396a33a8200. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:46Z), 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/CAK471500803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb725e4d74220be6fd5814b90e8e3e129239a89048b79fe6965e5f150a608b12c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAK471604101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3c00cd344626f59811ce498c2b5385e8b8f42784d958890d486dc1f88768cd. 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/CAK471604102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c73f5f6641e0ec87cd6527dbf061f856aa6b793050946bd4c58de6bd9efbaa6. 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/CAK471604103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48706cf18fac03e3eb8d4bc030b207b5a896d823f7edbc8bddf4894097be1f9. 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/CAK471604108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beb63cfd3d0be17f1b46f7c0720c4b178724ac2f8ac8ab8a7b2a5cb4b4e2764. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CAK471604110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb725e4d74220be6fd5814b90e8e3e129239a89048b79fe6965e5f150a608b12c. 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/CAK471604101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f00d7fb2bd293797409ae627bd79987f30ef6b629addb435bbd0e12a5d6c57. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USKO11900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855b222133b7b1aa710408e282202eac2dc03c59ff2a360ba9815ad5a5125e0a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:05:33Z), 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/USKO12000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2997dc96b02e5e87d5fbd3c2d75fad76250632e7e3879c26f2dc9bb681d021. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USKO12000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5abc9103f9a48b5c2a6431487d3c9936ff605150ab738ab889a9f78fe7241f0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USKO12000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f55fa9d9565c3c3c290578982709e851536e14dca5ad2a675463f54d390fb1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USKO12000025.