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 0xa06ef8e1d6c7c95a5b8a71aa2be51b5ac1eca71f9c98c8055d6e0bac53ee52c7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77829836-daf4-4f2a-a2d7-fd1efb038e1b.json and https://artists.proofprofile.net/proofs/artist/77829836-daf4-4f2a-a2d7-fd1efb038e1b.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 0xa36d50d140037421f5bc18d62bcacff2347721122b9e1ff4dc21862fbec9bf12. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZYCS2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc1f646fb703588194fb63a39ccf6d51aa73be10771705d6f93b8447b0cdb8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZYCS2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741d56cd3c9c5d20c7ac07c3336577ac753feb1e867a4b2453ad9ba917b57393. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZYCS2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9729e2a33e6b3aa4c34eb0681438460c4b634d2dbaff0b4f9527ed5a93b4e78. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYCS2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3ccfe139d3bc437da5f31faab2aca4fb855901d0fb3ed685c6b5f1eb6d1e21. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZYCS2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc1f646fb703588194fb63a39ccf6d51aa73be10771705d6f93b8447b0cdb8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZYCS2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91fa14ce7867b20e23cf707eb4da71eadc9cc7fc03ce1c94b6f227e7af9c0f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEM2157500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca4caccd8c9f9587bbc522f11efe8da775db0e268ad456918f3e498a7a96d24. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ42298075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dd05a5c5c916c003812c332879b53d52c2f333e013c35129a7cc7e640d982e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ42298077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43daa4db9c9a335ce82713a2716f3f82ccf56e25996563d951098320a4152fa8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPLR2175213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55ce5eb21e28ae15ad0b4670d4e8a7984df56fb3a5360ac7d9cf847ce77352e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ42298078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8133dfa0dd75c713b7b1e939301843b073f993466c40ec450d3a916280299a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ42298080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30406ce7163a95664ab5c042eeb839e62c9b7651b40305e8b033bbe8171cfcb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZYCS2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fc5f28c3d3dca301b0e148c2f21d4f6b3a509243ec3c8cd028aa99ba0f4ab1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZYCS2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f9e33a940239f1f32dabc5b7fe723179e2bfb780e8711d9e8e47fe909ebec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZYCS2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43daa4db9c9a335ce82713a2716f3f82ccf56e25996563d951098320a4152fa8. 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/QZPLR2175213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525c9af21d58b03c8bf4b4c4c7a74597a7dc08b4babd09b56619eb9b1a4db1e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ72278103.