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 0x2c06dbd2f74f540f0ce71eab728f127c0e23942c94e40b192a42f50c2c40555b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfa1e8fe-485b-4c28-b912-61d9d950c960.json and https://artists.proofprofile.net/proofs/artist/cfa1e8fe-485b-4c28-b912-61d9d950c960.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 0xcc4741a6c7d4709d3b5f279727cea776620f43af4f53eb9c2e3b25de6f1982c5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USHM91413475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4a9b8358ac9bb9072c861a4f4c0144131ec28fc6965ad41a64310fa7570415. 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/USHM91413481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7926ed3fd622a4f9784b9926c8edd9243f075c2cf8d51a26dcc796b033ca9cb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM91413464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138d939caf4a89e1a208f6830fc508aefd6be2c929ccf1d52043ba7a4419fb9f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:38:20Z), 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/USHM91413465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb200b2b42482cd38ab87fe8c0e6ab2eb02b74e20332e8acf078a16f714d004. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM91413466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9354e4ce83e398efcc439f06d7033196c79721eb1a3dc2b13d3b486b7ec830. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USHM91413467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3675968a0c871c4b1c30315adff070ec5cde2c14815f5f905a407f2d668ecd8b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM91413470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0865a978c576087f75f435387146cf83bb88c29c10ed24498fbdc77b48bd83a5. 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/USX9P1440369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aec87089db14b10281b25f608f36c731b0776f4695cb452735dd7beeca4e7b. 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/USX9P1440370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bb86b42ce8bc6c64828f3e04204faeb5b79e88ab0522219b716dc71153194a. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USX9P1440371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a55148520c2b286b2624e661d39734f5cd2023dc086cf715aafc1771c9d3162. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:32:00Z), 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/USX9P1440372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373465696e500de516bcef05384993e933ad46a62cf38dc62e3c60abc9b180c2. 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/USX9P1440379.