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 0xec2078e5acc534569efd1fe76f6598bd59dbce8bfe98ca8b3c0f6a240b6aba94. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/041d1730-11b3-4394-b4ff-5138d0a2fb3f.json and https://artists.proofprofile.net/proofs/artist/041d1730-11b3-4394-b4ff-5138d0a2fb3f.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 0x3fcb3abe07100579eb97729b5111dba33f6055fc6f3c45dbff6401cff3349af6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6HN2142603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc7fba514bc4def000221a9760c6336b750c801f3b9ef269d2e1c7b58682242. 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/SE6I32153884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd2c2a7fb579b6b63488dda4d90d858ad19989cafc9d7c8831582dbaa01776f. 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/SE6I32153885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679504165f14acac94b74c6c8330d499c5dc531831b856e8d5beaaf2097e0e4. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/SE6I32153889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47723be13d7fbbc898a669f9cebd2db99607e6ac83e17b842e20c764b0672b04. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN72201250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7922029649d2ff4806ce8184b1b4fe08b17499841615fc9526ff89b183aac46. 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/QZDA42305702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dac25335152744993539c6c5df4064c627535d898560d13162fc596930d7fb. 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/QZK6M2368987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f347d098960fb62570d965253ffd785996f0486c960f3c04c16d22f7936ebb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFS2324439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b1fd24a8776e5496e9666fd3370e50463129acb9d60fabed69fd4c725787d6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN72401964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa32e49a84079e38ce77cdd6f3782ea3b90cedcb957dbea22b3a0c0e4312fea. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHNC2416106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd8b8c9d805e5a5a21429129a131d211b2fa8aabd687044d8ea7cc06266d9f8. 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/QZHNC2417051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f768d092d14694f884711e4db78770349da62e6fdd6eef34b609c575fea1447. 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/QZHNC2417053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da988721a70282df7d92e789c5b46fef17a1b47b6dd40f1c430c44fccd8f48. 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/QZRP52482607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfce48a60cce921a3c471c98d0719cf4ab22dac12a5ae042a141b8128dccb9e6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:14Z), 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/QZZ7S2438874.