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 0xc3e86873e06e44af13831939ab9fd7854a381f843c6cf2724951cff92dd632fb. 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/0bf02fe7-611e-4c67-90dc-478fed3ecd7a.json and https://artists.proofprofile.net/proofs/artist/0bf02fe7-611e-4c67-90dc-478fed3ecd7a.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 0xef50cefab8ebfd255dfd54ca902438e8910672a441a3b516bdb3e554a2ecedaa. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZTAX2375840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef50cefab8ebfd255dfd54ca902438e8910672a441a3b516bdb3e554a2ecedaa. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZTAX2375840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bab0072fe2ba02bf11874efa0c159e23e3e08e5c5d766dcfc119ebd16fb5bc. 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/QZTAX2375841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e5783eeb90b7599770affc1ef2bb8316113e34494b4e250ad7663acb3f1936. 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/QZWFE2353615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e5783eeb90b7599770affc1ef2bb8316113e34494b4e250ad7663acb3f1936. 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/QZWFE2353615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f0cb3fe7a767729a885cd0848a03c7d0c7c9d438cd98550a86183f225d210. 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/QZDA42426941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f6e2739a1e2af4918698695695ff3c3b926d1b5f74ae32d166f6ae3dc1abdb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA42426942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f3357a3338473e651cb337d94fc6b3abc8fe873b090a93a75ab5910cddb60e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:00Z), 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/FR9W12424062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bee48462845d66acbe266278b52057f899201606e12b91a3b981a0477627d6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FXR872400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ce2842c3252646a822c92f0cd4f65196ff0060f3bfef8c1b85848414d1544. 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/FXR872400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed39ca8e73a303deb42e5f875561d6294365f5862089a1f7727031fa2caf607e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:16:02Z), 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/FXR872400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262e9972115e0e04b217ae8b7ba776fdd58dc89d46ff3a19b1e91af834c4052. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:32Z), 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/FXR872400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940f90e28ebf9357736b3941cff4e2ede55b81807410b24d4872d306f5240627. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FXR872400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a057fabde56f9c9f0bd18f8919a0c3c9db8b70eeaa3af9d5976485f15a1a14b. 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/FXR872500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088d8f14a3727a7bb83eef7add9b8b1f07c65d94c784bb7a27246fcd4115440d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FXR872500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258730a1f2121de5e64f93f17ea2b85b78bfddfacc7a1ada8bddfda141f89cbc. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:58Z), 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/FXR872500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88022e4453db09860311e769e38868b8a1b8537bc7a3f8b7942b5c4914fe47e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FXR872500050.