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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b08bb3c9372c3ee4ae94d2605717e0ac2ebde75adee29fedfeae661850e3dcc. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be46cc7b-efbb-4db3-9835-37d43c550b45.json and https://artists.proofprofile.net/proofs/artist/be46cc7b-efbb-4db3-9835-37d43c550b45.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91523aad1002e504732883ab11daec272c1049dd12ba3f912a04d9d834497c4. 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/QZMEN2592262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f684813f2622614b2ec216c279671a24ec8dcee0b939f629b2c250cf084f02. 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/QZMEN2592263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccafb9f4f9347f19ebcf2ff82a5444f51817be3ab342e76936c101a591ae80e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZMEN2592264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd5ac77637a746433d097d1c0ed04b9d52c875d698a3bce491bcf14a2473dbe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEN2592265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09f014343fc7e488bf4007415efabaa1de64b721801417dd02cd051190a4b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEN2592266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc41f43ffbfd2499f4d78d335d64beebccffbf99bc542dc45714b6637efd811. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMEN2592267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c7272cef96b110fe9a230f8cd6e3c2c80fa1c66b5311077082e1e6e8c88151. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZWFL2584738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41072aae6545fb53230c522bf00b106de1e0791c49ba735e6d0dfbdc9f8b285b. 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/QZWFL2584739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d5c4815033623e8fc93db4b98f5865517d5355a395911572068e870c529af5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFL2584740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b74af604b108f196a7cf0a679c1baae5024914343a9ed1b982f78e88861d7c6. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZWFL2584741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e13adebb286382a81bc94eb3b79e30776ca0edc773575d833296d5a1760674. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZWFL2584742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e83aed8c47b4fd72d48ece4e0fbf3da0652cce8555ad54b3b0d1a35a17f5da. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFL2584743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334561725194fd678cc363efa6d35025a8a199bd715da242565f669d4803b4fb. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZWFL2584744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea2c23b419658b79669624932fb9a0716dbc7bf163227b9ecc8c6fbbad9bf57. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZWFL2584745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8515402a1bcdfd4cb8b9943eac411927ce2faea34711caf7124882ba552f9555. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZWFL2584746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25e4eb24c28da363903c163bde834664964df99dd93ac0d550583393bebd34a. 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/QZWFL2584747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07c695a6461127bc9d1f77332e57ac35dac6e3e54c25b3db0c974a608bca906. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZWFL2584749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b11e580185c2c7cb6e9d4a02091a3132aa30fee3ec91d67d53414ffce2592c9. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWFL2584753.