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 0x4a349881a787e1c5415e27dfa863a12edc6ea17b342ac3760cd57cc175768c43. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/474be2e2-28ea-4cc7-aab0-7c2a3acb76bd.json and https://artists.proofprofile.net/proofs/artist/474be2e2-28ea-4cc7-aab0-7c2a3acb76bd.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 0x7421827dc3a060d92f94e5e69a94846ed8b2d2c95eb7ae9954c0472b5b236f4d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:51Z), 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/GBSMU4885006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c0e4817f31bc3284d061bda7435c5c5bb76e4a17e5d0c846bd840c8f9f7a9. 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/GBSMU4885007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ec2d52ed4a9a76f0fe74077098119316eac7923b90fc93adbc7fa3923be417. 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/GBSMU4885008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e14f0bf26ad6d89eac6f0358df2d2074945a3b091986cb91df2b2036db8f3d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBSMU4885009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851f466ad49e536c954309880d43f27074c07952171056efa94cc14dcce3d73b. 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/GBSMU4885010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31d66392aa2f5c036e0c65d90ea45e4d2148868f0a11d6202c06a2e403a0171. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/FR9W12100738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681fbc7c8ec8fbc7c285bfe17ae5e98b181d50e2410904cda5849549934cf99b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR9W12100740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65208b2ba56702fdb34e31f3a5f70ddf22d8116cc453a9b9f7eb829c131af3ab. 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/FR9W12100741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58e5834156c38655c9493dd59574fecfe90d8bd3b32c8e04cfaec0aed302bef. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR9W12100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c63c1763fa25c9f736c27f3beacfd46fdac13558a32914dc0c2d8594e242763. 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/QM6MZ2416662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3cbc6000fc9284f0e4ceca012fda6f84cd198447e373c8f3b333428f7d22ac. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:35Z), 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/QM6MZ2416655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bd0fc54fada3f94e474d3482b94d236eeaf964c1c25a538be007002e08dba3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:29:47Z), 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/QM6MZ2416656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ede8eb842bd4512af21d42ca37dceb016d29b010f8d21a07e61299685f61296. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:44:09Z), 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/QM6MZ2416658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28febe6a7979f6b148926bb606f5e79a109e258def6a26fbd7eee7f9e1ca0ba0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:42:26Z), 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/QM6MZ2416659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa08e97d7a3ad54825cf212e60f5f52fbbdc051bcdcef7b77123a2b20ec381c. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QM6MZ2416660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182952efc69348baa985331de8ebc3608f7fbbbc91ac9ec6ddf018ea158ea87f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM6MZ2416661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c63c1763fa25c9f736c27f3beacfd46fdac13558a32914dc0c2d8594e242763. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6MZ2416662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a410786c34a79a2c5b59b30992e0e93264d50384e988c0aec6bf2e53a22e4a2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6MZ2416663.