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 0xb6b05dd29d838ce759069407a6f75b0687668fad5a7601bbef03ef8d70b852b9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a934f62e-38d9-41e5-8b42-2b0c47d7803b.json and https://artists.proofprofile.net/proofs/artist/a934f62e-38d9-41e5-8b42-2b0c47d7803b.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 0x7c8879dc60edad8e558e68de6ec18aef49ec30b9bcd44bb4b7a7fc43e114ca63. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:14Z), 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/ZAA029600325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de4e3616e36e1118fb48a2d90c73c5711f73f619484c2bde0df28bb84879978. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:34Z), 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/ZAA029600331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de2327a3fead97cda9a9e35a34effcc07ae8d8fe485d492dbf665b1ff75a45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAA160000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb1d15e5716b2456441599030f8b61aa2a676db1c277325b6de66c6343821d4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:38:22Z), 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/ZAA160000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01ddb463f0428b2d5236c5f4425947902d020cbdecd17e119e12dc9c3d69746. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:36:02Z), 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/ZAA160000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c26b3eb2fd5e534c05a6c64b465ed27016114cf2777d62d6656b6cadbcd4bc. 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/ZAA160000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d0da393836e7b487497ee8053500bf6a8c2388371b2b4bb358a6db7b51d4d2. 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/ZAA160000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df29d644891b672ba5515593e349c129f939e12142cc5c1f09515d74c43ec3f. 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/ZAA160000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bd7e01c20a178afb7c582288239043b28983cfc4ebf0077ba953e42e3168c6. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:02Z), 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/ZAA019400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1061f530a1115cbed9f339a8ed0db4fe98b7cb22726f7994defcdf6393355b. 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/ZAA160000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111c0a49e207f7762e1ec60664415d81a4cfc720672ecda8aa97452f9237d575. 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/US6R21223084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff273e0e83c3c8b9ad0894179d7da5d2aeaaba779a3e44cf3c2344383a4787c8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US6R21223085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b538e5b95a58c65a788229c4d7d8928943071cb0b6036a899048aace99e40a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:01:22Z), 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/US6R21223089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49056d540e436eed9f94e21e47429dbce18fcb31419ebcf5f20f74e2eedb2ba3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US6R21223095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce24f0cf34706c1e7e6de90cbd7de5fd28825d9515d2ebf2ffd24072b45019e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ZAK8B1800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaea03b4cec15e35976ffb2d6a86d6492d74bd78f6a35295a6e56611b7ffa34. 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/ZAK8B1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968f8745c556d534c103ec9d26e6cdec7be9899262210db1017afd3441636efc. 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/ZAK8B1800054.