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 0x2667e92f49fd32b38679754f84fc239ad76f1ca2304cc95eda31aded110fda89. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8ef9bec-97f7-4b4c-9662-5ec181745a1d.json and https://artists.proofprofile.net/proofs/artist/b8ef9bec-97f7-4b4c-9662-5ec181745a1d.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 0xcb4600b78d16a3ac9dba3f7450ea00938ebfc7f19db0dd81a1484e73b5df9a07. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEAR42584623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5959e600d8a8a94f6ed52361f1f4106a46d9483c8f3c43135c0b16b82422d9a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:41Z), 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/DEAR42584873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63e5d3bd2f9ccd70770f388effa9c253518573bbc9ba96d98d7cafd66c70f3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEAR42584892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a21aafc356e7cf163d62f89eccfd0d0baba15a902632b147c3a6eef2100bbf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEAR42584582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33536d1bbaa454c94de625a8e9fe8d9e151f426ad0904c018ec11460fd41d148. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEAR42584624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43df7f01eb078e21efd84ecd53dc7461e45f3dcc031519ab151d85bdbbbff1f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEAR42584879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025749c737e3a207e318186f3f07dedb42d256a7c7ffb70407d9f450bcd7eadb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEAR42584495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd98f4f63f2e282e7bfb9834d89ebe81deb39fa5d7546aeb0b20d11237e8ea8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEAR42584536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896785463d7994c49e9ccdb62648c3df312435dcea27183e59e60013c332d91. 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/DEAR42584774.