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 0xd40e8c40f3c86c53ec6459b5b44326b3c6cef47e8660eb3694c2fc54b852fa82. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/541fe95b-a381-445a-80ef-ac1d6b13017a.json and https://artists.proofprofile.net/proofs/artist/541fe95b-a381-445a-80ef-ac1d6b13017a.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 0x6338ef07487173d4f7d1d4ce335a4e23f1e596a9617eccbe5dc7f2f9d844755d. 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/QM5MV1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227a6dfb2170ce030568496405543b796eff22aee9066aa0e05e4a612bca4e40. 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/QM5MV1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49550c3568551442b3e863b383f19ebb700c4ad394d7705590371510ee3ea169. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM5MV1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f9e5e3cc57e70b813e257fb7aa15cb34050e384f9085abc49837a4c7c9ff85. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM5MV1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08547f46a8203288c25dbbf79a6f392f3044c1bfff52459ffebcdf6912cddf. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T07:59:28Z), 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/QM5MV1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4fbf7067ad6145464cd5dc5fde6e94e1e1b1b3295111be435df1baf4cc9dea. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM5MV1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b59422312ea82e02f26b8190eb455305637ca8814ec6a585905f4eef1753748. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM5MV1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4fbf7067ad6145464cd5dc5fde6e94e1e1b1b3295111be435df1baf4cc9dea. 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/QM5MV1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61044d746ba8530d6c4f70695cee7947dfae8824cfdd3cb132a2ebad9a3bdd24. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:54:44Z), 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/QM5MV1800007.