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 0x079e1a93d110ceadefdabb679d21c9a532c6bcb011820f7d158a2b62055a34e7. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdf9f642-f4e5-4cbc-8864-85fbc422919e.json and https://artists.proofprofile.net/proofs/artist/fdf9f642-f4e5-4cbc-8864-85fbc422919e.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 0x3a9f2d1133b1a09ff8415025def1d984cae33e5d49affdccb817f2628410b402. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:08:46Z), 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/AEA3A2219931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d91b702a2fe7e865b6194e88a1b9c9148649d766f354a233c8b05165ebeda9. 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/AEA3A2232347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6246f814856ea652f96b5116569403a7643a16aaee784067d442344248e037. 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/QT5M22507232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abeba29ac51fcc552befbc2f42579d2a2d11c0c208b3233b3b9b99fd8a936b5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT5M22573222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6e425057ffd0a4c8c12bed6df57f988fbeeb09c56b58cb8f926b9565c2b389. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT5M22504719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a32f1d9c6d68ecff3fe67b5a2271fca08d205f89358c5cac674101be46db9f1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT5M22556846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a2d883baef3679f7d7c7785a82be3ceda6bf0e2a939ba85e824c60d33ab9db. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT5M22567159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf234446e78517e4be0672a0131930516ad3cf4c39c22ff3c3a5aab1dd19b3f98. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT5M22547172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764963af4eb343d9d0aba3bcff643c997937f717f94c531a1c5d7e2f749c6ab4. 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/QT5M32546703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45b88d208924c08e951f842f81b01ffd857075e536c6dc923e099a3cc019f46. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT5M32503075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf125b0e33be017e78967cb856441099675492a5a5f00b598ee0b5a3fb291267. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT5M32505197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb6ec3645f8932a145b603c85c32b31a76eb82fdfb8216985bbdc7ecc4cb69. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT5M32587233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c987ae6782522d0b58a91e7ea2a2780d7cd473509dc38490980edef469f0d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT5M32512427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9840c13c03ac84117756ec9b21108c2a73eb7be5c328520d0a6d892a0679125d. 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/QT5M32501027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb434c9160d2a3f1fd1c9922a8e86767eb5beee2bed82b4d9c29168b3abd5f85a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:44Z), 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/QT5M32547950.