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 0xe1dc530f27463999df1f2276a1ec1077a1418214e43214457242cbf49c41c26d. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac96461f-a0e4-4393-b416-3f09784b332a.json and https://artists.proofprofile.net/proofs/artist/ac96461f-a0e4-4393-b416-3f09784b332a.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 0x03583b3e73d1e33539b6170a7015fba5dc198792c85aecf42c84aea74b6a7efb. 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/QZHNB2572293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e3808e0dda6b99a802676b89698bd7018e779c9cf08884f6e21e978f57d859. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHNB2572284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5565518091504258e9c5e27bd6fd69eb59ad027649b494ab5700e59c2f3ad4b1. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHNB2572313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6d4b0e509c017309fbe794a2e54d4536452ccfc79f5d2c3f30547b3920dc2f. 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/QZHNB2572294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0cfd269f56bb8561430d84fac4ab141eccfef7cc3f0feb3f2c1035368ad05. 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/QZHNB2572287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96dbd02c36eeeffc8ab564cc2b1716155e86e50d4e0315a5d16fdad71dcb61c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2572298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12511eac30d79649002e8909f5db203636b7c7b0e514bdb90354db5f3e0696fd. 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/QZHNB2572296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68897f2e1b1338379cae12d21bf2f33b2229af3c50093d4c27ee8cf14bfab0e2. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZHNB2572310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3952f4eb7d774d352b1ec6fb5b3e58d112863a3c944a9ee9e4e82c483e5b0bda. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2572290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eef0494d687322b448e0a5b2f9bb5170e1617b8310b83a48e4427ac12c504d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2572308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca17787df61376d83440c3c43c6511d530305ce95423d9add69ec0d175d2313b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2572285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f059e5f263e0d71dda525a74dfd443e89258188add3089c9ba6d5b5771e7aa. 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/QZHNB2572305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b5d2bb2d0e635c95489a6777fccdd07ceef440d6cd8897eab5ce1f64188e31. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:51:07Z), 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/QZHNB2572297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e42003d79f6a278111d016a277992984187cabd7dfd9986c36a1c9a3894ad8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNB2572306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b513910bb4323ab25e4ac264a8ce53d18d829a40836b83d6e7e3374d98691a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:10Z), 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/QZHNB2572317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e2be636d83dbc6bb5d13fb61042198a258cb52110f4974c171835e783fe321. 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/QZHNB2572309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb881e5b90430a9663b90b97a8e490c1301badebae6445d4d991fe1c2118003f6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:31Z), 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/QZHNB2572291.