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 0x14a3fdafa7256767b2f55dcaa9f52b94331b885ad729e6151a2ac5b57dc4a5ba. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c86ebf7-f576-466d-b131-a782cab288a3.json and https://artists.proofprofile.net/proofs/artist/3c86ebf7-f576-466d-b131-a782cab288a3.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 0x25ebaff676742dc8f1c355326f016382b27a7c6d471f4aa38fbda2471dc78a57. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMFMF1551446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2284e7f8ada079a60984b28887cc03d11ef38bba414e5c1a8d8931e412d36f. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QMFMF1551447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67041926f702be35035d1a645b0718d57b0b2b7b63bfd35166f7d6ecb8ced7d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFMF1551448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1e7d680f3565e319ad66bc72698e31154375645d5e04ec8168a8bdd732ddeb. 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/QMFMF1551449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a89bb71314fcba02cfae036714f1481ef4aa5ab6d9d528642a4720d8aff411. 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/QMFMF1551450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1430f2c14c6465e40028fa1466d877a9b3eac8b69c7d7bf342a7c49cc572650c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:32:27Z), 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/QMFMF1551451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9ca7caad97efa7b3cb3c5d3790f9fe6a06f53ef77adaa96b22f6dcb4c07980. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMFMF1551452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa3cc2821fe739ad88611379c57a5e5a703f186e21d724cc1f5ab7e3d957065. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QMFMF1551453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816f61c059a4d51d24188a2755a5ed31b21b31f99d2e570052f0bb671f3b8651. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QMFMF1551147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1141288a8c8b566d8df3c197d54a4cbc67417a086e3d01e877000d6d6723b04f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:02Z), 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/QMFMF1551148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657073cb02878bde89ce4098550fd3e5b7481f0bf913494ddc9fa0cc853882ba. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QMFMF1551149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc5ac4ac79d38d4f385a99e19915c901f71aacb5b880d52516242e7b851bc9f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:32Z), 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/QMFMF1551125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ac4351aaf0782a1d888d1f4dab80ec4c124a016db7e88438a62b933c7af171. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMFMF1551126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3ed1483138882622cec8aaaf7d0b9f0653ed3173d339e43cb532f5d580b6ef. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMFMF1551127.