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 0x28a3fb1c9365aa9cee8c9875319adaa2d056e17ce7c5bdee00d9598a483b9d76. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90988efa-0367-427d-a983-3af7ade261fc.json and https://artists.proofprofile.net/proofs/artist/90988efa-0367-427d-a983-3af7ade261fc.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 0x7d7c6bf0ac0a97c6b9b6c8e5f64d3a53310163e45fb3cb521c3af4511814aee0. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/EGA252408667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caefddf04e0c3f879dd81c2ee7f5c79781c47a35e86ff15aa02b6fdc2bb77fd. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:22:29Z), 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/EGA252410083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc8f9ae0defbd6d12a650660f2629330050bf4285d30adf3a240f754695a3fa. 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/EGA252410084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce08ffef4b6509451f5c22350a137e43771226e2678156935b56eba26951cad9. 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/EGA252414231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd82ec849862a13ece30f72f84b353722a7f4cd805f393569b3c07f95d471892. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/EGA252416745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf5d9c68206f2b0bfe3462036468a21b19d8cb006221bd72156b0f8e69e46e. 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/EGA252416743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98730e54ca6e408f367a1ac850cebee6f93094622716537de1088a6a8487f3d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/EGA252416742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a6a148d92dc52f7883b91d0b661841da5190df03e34cc2eff9d8eae5b7769. 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/EGA252416741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9827a446c3915e5b27811be41aa9f8b76d91fc660ca1e0642abcda98522937b0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/EGA252417059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7219bdd65fb76249888656c704f486378981ed8fc6653e6bee737ff8afb7b734. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:14Z), 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/EGA252500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd96efacaace6c5f978898e1da56865af1129deae36052d21fcf981f4d4d85d7. 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/EGA252500981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086a7cd3ae9d9f23bea1227de2da0b04deb12d1bc79e160c14c6091e90495388. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:32:37Z), 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/EGA252501330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124c47c1e8917b41e82eacd9d9f7bbe6d39e723031b78fe0aafc76b762264718. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/EGA252502116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3b0f142bd29289ee574c9260d9b045c4d3089a34cef5d4a188c07b3cb95bc9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:56:11Z), 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/EGA252509254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb4059204d608035885bf982c99e604fd15eaf3b27c7d2c6733932bdaa41c1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:50:30Z), 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/EGA252509790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1f2df17094cdcb2b1192b19e087629927ee07ecaa70696fcb836f1c0efec1d. 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/EGA252511939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b3ceeb29dd5bbd8df7a4d5d660a09597d46170317d1bed10f295829fc1898d. 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/EGA252512960.