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 0xd712c31f6b41cd8ba250e6504c4fadc50696d4882fac7d13fcfb22cb236922ca. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72470b6a-f1e7-4fe3-af1c-34340250adb8.json and https://artists.proofprofile.net/proofs/artist/72470b6a-f1e7-4fe3-af1c-34340250adb8.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 0x2a99e6e3f3996c75074cb30d9218fa797de9519d13196f03bfdc2f4c0b63cf5e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F42540624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76922cf4969188d38e455843ca91403b4475ffd69601858e0d4075ad3b6859d6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:20Z), 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/QT3F42540625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520063fb8e8168305e36bb9bd5fd8f782ca6c6b6efffb992562c6157e1f4573c. 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/QT3F42540626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b06dfbe90ebdd09ae564a5066b072953812e4b26560a02458e0a6077cc8084. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:09:07Z), 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/QT3F42540627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee3bc35af005c7f426cf55838d49b1d51e788a215ad9bd3a8ecf7ad78caba3b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3F42540628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b709ff051c36a74ecdb1e85dede95d634c9537ae4a949361791b830caf833b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F42540629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6304789814f295b882abaa2a68c25f3482e6dd170ed4fe7ff336cba3d98e67. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:08:44Z), 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/QT3F42540630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb001abc83879f6930bb8a6f1791386646b351890448ff36fc3a256cbb96ce273. 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/QT3F42540631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35fe697117d23963a0b8e6367c0c5e21891168c42e937fb3b4cee548d80fa58. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F42540632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9aea7f103a55a8dfe5590daee4de60bf51b7ff867f971a46082a143b91f2a6. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:12:01Z), 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/QT3F42540633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc26033bd7fa7940c261c845a876ebecc0f93293535da295a91df1aa075edcd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3F42540634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3334fc35c00a21793bd4bb9ccc742f0218de116bbfb7b57c305eacf425a81f72. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:32Z), 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/QT3F42540635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5cefa4578bb690eb4edbb245e51fd793cbbc626d72652f5a7f014669933dc0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F42540636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbc2636e2e47fdfe31ed114323e1c87ecac417fef1501d60c6b6719e58b41ba. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT3F42540637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3d3e306057d768983abb7a0a37cce269d0dfed5e34ba6a743c2a362bc73cba. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:29:42Z), 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/QT3F42540638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fda4e1fccc50549b78d8443887c779e1679dd0292416c0b3605068df6810829. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:23Z), 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/QT3F42540639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb984c3acecb4e86fb339b139931a24de90c3190d7be2b05e8b535ce799a4a192. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F42538275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e2435c31a27ed5fe06b1f014ce7baee226c0d3d3c4e450ab93a0434acf47b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F42538277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71ea4a8b799475ef939f3809c8d357b341ec898251e525698b0c3a1f5198a45. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F42538283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545ad9ebae5080c3e0c7dc1179c1a26bad804a6ddb2d0b145867993e6d79c762. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F42538284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690683b2fa1b4e343482d166a4a8ea77304b468c4292ebef552bf96cb8812223. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F42538286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931a4fc6f05ef9c0f3cfb875313d03092f0a81402ed32fdbb7f9a6c962901130. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F42538287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b52b8733e4bfe182148cd33bc220dc1f689385b5e8901f5f5badfe115139f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F42538290.