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 0xa9b1b224a4d19ba5746c9202f1ffcf79a46a7d3b49a580d6ddf333b1335fe490. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/812d68f0-3809-4ec8-9d0c-461a726bcb42.json and https://artists.proofprofile.net/proofs/artist/812d68f0-3809-4ec8-9d0c-461a726bcb42.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 0x16549e8196565491941a0f43857e1ad73fbad91c8b3d53c64c0a8c499f2afac8. 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/GBSMU5762770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ad82a49ffb87aa2f244291c7594abb9cbac9e7ef85bd86e14231143af5efa. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBSMU5762771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ef743786c071ef6ad823de3f4697eb6369060d5cca7abf3138f012b1c0bc25. 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/GBSMU5762772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a20fa507679e2d43233b630af81d8be78429cbab8058539f3b41e3cf85b53d5. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:54Z), 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/GBSMU8285897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deca3e9dc2453453cd133e4c819aaa8d9646cedce48de3dff96eaf60524ca69. 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/QZNWW2270887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d24c6f0efbe0fd4deb6a4ebfe518fe83ead157fa9f377c9c0e1b30968528cd. 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/QZNWW2270888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d9218fb940ad0134654793a132984c4036af4b3403cce2d5e031f7a282c003. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:32Z), 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/QZNWW2270889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fdd3f05783524615a5778220266a1eaa241934d72ddeebf49dd52b60cfa4c0. 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/QZNWW2270890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8b5184790b39466e351672af039b97df7a045299d2c8572b57859d98350ab7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWW2270892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fe712570acf4fbccb7c9a12ecc4e267482d0f329508fa678472c1d0f34bed9. 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/QZNWW2270894.