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 0x2880e1ff3bd62bca9710d9188a761ae261b667ce8e76766ef4bec88d02e7002c. 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/48468c8e-7c41-4c7b-9933-575008dcf4e4.json and https://artists.proofprofile.net/proofs/artist/48468c8e-7c41-4c7b-9933-575008dcf4e4.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 0xf4d09dcba7e740998090fee50c33ac4a34e467c97cfa88e83d606584d2a4cc3f. 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/INE182014148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2699dc4e387a8cf8ca49c374c2853a353a299996456329e603f24bdf0ce9e5e0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INE182016185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fb5f987d5bdae81b2d0027d01793caa1590cb681e24d70062e65bfbead4b58. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/INK602100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5276b372e5d54b7ad3a1e605270e202cb1cc5ecb59fa6c4cce5ee46d144acc7. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:54:53Z), 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/INK602100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499881afade54d86325561e3ccda93e9a61636fe432ded333fe1287d1b182d85. 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/INK602100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadd250b023f74d84a8fe5ca47eacca09aff8c4c6f711fa38a67df8b05f5115d. 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/AUC6R2121746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13a0a3d36f16e6dd59dc4afb38bf1a7d8e3704569a66148bc992e6515fa22e2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INK602309394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762bbff8824ca7ff2fd33faeae4eed984086215295fe49daa2f7cd673b2aee95. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/INK602309395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e5b4533487116dd692eace755c910da9544c870bdf0ccd1f1abb7a6d159185. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:50Z), 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/INK602309396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95eeadf950d2bb1f058a5870a2b44edabab4e29b1a7f6966781cc3c7bb14840. 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/INE182331458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640fde6801377c6f67e2c9bce5ec414a37795771a1e0048bbab5618c2c3b6c7f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INK602412973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e8d8c4183bc29bcdbf0eb13a0bdd0726aba4ddf1e9375adf79b785577a86c9. 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/INK602413622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bda856b17b0d813cd6af7e9c0a8be03896eeef637319988c98963a5024561b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:04Z), 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/INK602413623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96210f4ffd04476464669fa4d6c276863f60268793b31bf7ec14552b1fab873. 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/INK602413624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ad8279cf8b6f76348bb221f80e36893392a1659b64532711cc68e3a4b4810c. 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/INK602413626.