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 0x16bb6780e1d05f85d9fe3ca7c924fd60e8e1e6ada720b7d78574be02e00c82a5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9d6003e-1a0a-4147-a71d-bac9d4fa114a.json and https://artists.proofprofile.net/proofs/artist/d9d6003e-1a0a-4147-a71d-bac9d4fa114a.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 0x10bbe8a32b30bc500b46b79b27cba5065367eb1920df77675ed03def1e119f51. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZCPX1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f44426563eb5df1543328544563f8f9cc25c96dc6ad23c670346b1c7a2c4be. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZZ7M2445924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f08ad9edf6ffdb699b13b8b03e404d73d34a6030fa63666ecb858126d1469d7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZ7M2445928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992fc103b8a87f5e01cb6eed23d54b95917af147b4ac6841151a734cd20496cd. 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/QZZ7M2445932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a4081d71dccc357e91ecb473f64592f4824900a823c1b9926987344ec1fabc. 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/QZES62504342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1f322ed6bd475cc5c5129bad59ddd5271d9454da3f78c2c125270db756f1aa. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZES62504343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850ed2b07ee5a6bed9b444541f2ab99b1314d059607f62cbfcdbd1474aff7d85. 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/QZES62504344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312ffe52f11deaf287a57151b61b5aaec8f6d27bb9cb1e562132faebea6af4f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZES62504345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45105faf769025d6137e312e8e412f5b1ad9e78be088632a6370cd1b5f14029d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZES62504346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c2e558c73f7bf87caa2601b53e7e2a874b0a0f2fa6ffc81fed87c68ef2e75. 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/QZES62504351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded50651ef9cf4189788dda3ad2c0516d1234e55d1dd5c367dda5856d3ee46b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMER2579865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21f72b5358ed809b2a5aec6348a8c8d05cd56f8bfc1b9bd733cdafb6892d589. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPLS2592143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf531cad0366b0c4e83789741ec98fccbd961814e8b326172c54f9d21d95d6fff. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZZ7M2445931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b623b9cf72c2ff0724099861f0be819ae5e38792eaf3d8162c8948c507dc9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFH2565411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded50651ef9cf4189788dda3ad2c0516d1234e55d1dd5c367dda5856d3ee46b. 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/QZMER2579865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d22667f340948f826a4e0c7de39e9f7f9d48c419f0bfbfebb03d181153b0e. 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/QZWFH2565412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2313ec73fa33f4f4bdd736ca595e9ea45af21ba5f25f508748bf31f624dacd51. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZWFH2565413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1ac85f9a2f88a0ac618aee197c20fce14d4a0093ee3e37f9d5ce4b9d14bc9f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFH2565414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec996505e96faa2eb6f56d4e6f236e7880d13292bfe515d49fb80ccd09f90626. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFH2565415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaade7fbade1f87de7f49b7a49b2fca0a483432b0ad791e5b3dac9190dba2891c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFH2565416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf531cad0366b0c4e83789741ec98fccbd961814e8b326172c54f9d21d95d6fff. 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/QZZ7M2445931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5f5f09893177a91a97bed7500102d97305599884b9ceda606cef1d4b8f8015. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNMW2543439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded50651ef9cf4189788dda3ad2c0516d1234e55d1dd5c367dda5856d3ee46b. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZMER2579865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509057abc37818b579ba5922c17cd94ac30b652ae9f768fbf476b86daf0f2485. 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/QZNMW2543440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a06c0a4d17f1b220b82c08ea18ffe2cf9c78a1d2cae428639225533c35622f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNMW2543441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de9bae106c94d67698a62bb9489f6aae5e8d090a5bb47294967abeddfefb12d. 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/QZNMW2543442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e189a170f75f9e590ce1da9da40fa9e3d545cd3715711a786d13384c9a8312. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZNMW2543443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c12160347ebace745296886300382232d0449529093e4adfcee003bc18e985. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZNMW2543444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd216cbc47ab2b7098a8c9aa5d4b4cbae16e84757fe4714cb07ddaf3022bffbfd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNN22120994.