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 0x7dbc1241f83078d307d2d320f3db7f21dd6ecfa3bb59b307d84de50b9239e1ec. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d1fa61b-8c68-4835-84d3-5f3a766dbc26.json and https://artists.proofprofile.net/proofs/artist/8d1fa61b-8c68-4835-84d3-5f3a766dbc26.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 0xae84108115bc37b19281a10f3f366f48621abd3346e88adcd4c0deebf1959370. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZES52023982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc91cadd14669e420f775eb42ffb1b8d415dd71c656da50eff6d7c06feeb7ef. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZDA42022383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acedabafddd78720ee26dceaa359854bb789c14766697754eb62d131dca9710. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZHN42016901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e23e07a10f68c29ed6fff9ed89906d9e54a3a79034d3d9efb68033dfb76630. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:46Z), 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/QZFZ42045617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc378fc9db760122db9698f3e2a7d834ace67bffcdad3cf113670a53304adfc0f. 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/QZES52024005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00d20a7edac3df5af3bf3e4dce355b41bf47216b94a3241dd708530d204651f. 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/QZK6M2039414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f21e340248eef90f1322ae7e6555703de1cc7577cf20ee93011d18e419dc23a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWX2058406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f83bca3d5b88893d6771ec5ca88d23894d9d5cb960460d5b2bcc7563a42d5. 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/QZHN52199751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dc374358ef82c6ca32164b9eee3a0e40adbfe4231ee1248a8323c150bad9c6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWQ2120161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3f78d17ad6ddcd5645c86fd9f90b780fcff16a71a5341109841ac47054a51. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:51:17Z), 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/QZK6P2283843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb3e03d1797e33fafc5d57fab60113243649971874c8b54fabb9d3efe90b7b8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:42Z), 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/QZTB22314568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5e6f60fa7d2cdbcc43255f08132bdc5185db616122c3c28dca1c43c833fd51. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTBF2347665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda23f954708cff25d69af84cb1a8d9ef9e8558757c46b3075ade3c9bc1b560f1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:57Z), 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/QZMEQ2433846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44463d3fc38e8669377dc984a3a1d69b5e96202bca09c8fad1d6da6e1deac222. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA52573332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa2017080c2cdcfcf7971648be8e1326b57f841b49b0cb1b598f1ddfb0b1d4b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNA2551496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eae0e7bb961c6525c0eeda6eb6eac17bb3f6250a95062b2166b511ec8c87263. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBF2538662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8614c67e88b8f95f4f7e3b5ad1c3e59d5583f8126935805d9e34fee813aa680c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:05Z), 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/QZZ7R2539103.