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 0xc2d2b4435ef11c56f76d18704b8aaf6c4351bb98eb6433ab9043750f5e6559e8. 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/a13f5e9c-01e6-40b7-9567-87cb4ce05c23.json and https://artists.proofprofile.net/proofs/artist/a13f5e9c-01e6-40b7-9567-87cb4ce05c23.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 0xa53f3c171302e37b65093e7b1b2499bdd8d781e41fe0f1a37b640a821ac07ce4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US39K1423502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3547aef6c49ddd192d02d95576d28f78c832df9885bca9ca8e9c79f7b07e220. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US39K1423503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8118adcac2796bdbb74133cbb03dc289dadb217eec57e7ebc11187da14a1633. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US39K1423504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0af856fb7e0766ddc15f0afc1549b04208f895caa666fbe4cde5a155c1108. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US39K1423512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf9aeddebe82f1e19c7bd47b057ee036401022bb603c4fee6043120b1d7ed2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US39K1423516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaff7190b3754c5a01e8892f969aba609de7adbbee16619470c1e88c622eaf6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US39K1423518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd21efa1ff739c8521ac48e8f18b950ac651ed16c02413a6ccf277fa2a97de20. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US39K1114001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef0f475494078bcd6942acaf95a1956cf1dd867169a8206b7e8ea823cdcaee3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US39K1114002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2631fd34c84607cb0dc67d7c99d4838dfab541969bdb42f200ebde4c86b9403c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US39K1114003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7549295b40891e3589275eb94dba5e2c7506b196c744a227a0b768153560d7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US39K1114004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868dfb2e1a7e923be5ca4af294d19c5683681c2cc963d204a458ddefbfa30086. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US39K1114005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e9dbf6ace37b9ab93d5341d2e182a43fe5a33b8106b2008e93acc5d7ded81a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US39K1114006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0beb2aed7a165dcd0838bd1b071a9c4cb3427fa8296f82345fe0dc01080f0b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US39K1114007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c4f273d155bdff8bb352166f63e7b982eb7bf24e6c59934d33d444b2fbb7da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US39K1114008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15e8ae64d395e8a6994d689c2ffb62d36c6a94f021e7ec3549c716a6262df02. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US39K1114009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6056c5357ab1877ad6f0de978bb6817540a089e3bb827ef7d4933ab2b6b40c25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US39K1114010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c83ac5f6d7d9698e0d8dcdaae7123fa15ff68ba40afc81ecc83f85f6bc57792. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US39K1114012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa711be0162705e9b019bc8e97204e8b39031f92b0043da9330ebd4f05ca3093c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US39K1114011.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b7b38f961b6283974b4a834f8630db9631cf5206d3efcbc20f877f6087418. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US39K1214201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974640d731ba7d9b48fbeae7a6fee8a49d9d1d542c13adcd709d5eddcbb606d2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US39K1214202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7892bc7bd984356395dce3ef24c3a56cc37c0336f680921f5c7c4101aaed0a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US39K1214205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a364baf5f251ae7fa9c70783ff491040b486a3c9a3aa3d9c24c7b5d04bee43b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US39K1214209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deba4302f49d57c02eb2316c8ffcbc73aa5fc05676fcaae9bc00165223e3684. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/US39K1214203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f6e6fc181627c535d0f2183913ec81f91eb0f8778d95f6e51bfa5775fb248. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US39K1214204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22df1fe36af503cde5911001b7aaf129d3dd098dd8ea4db63c881187f3b57600. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US39K1214206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cdc4c1e6e42828873839964e7ed00b333297aa39c161066bb1f6d3fecc3846. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMSAV1100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8011bc9af381f7228a05a344a85ca61091ae425e6153212600e8aa1f7acc4356. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMSAV1100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ac80e1251500244df95b124f8273d82cf1ee420d860d4d961235564ba2d5b4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMSAV1100334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14967034734236eba130c1110a0f082c1253eece7f615136db28eb1fd9e98fec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMSAV1100335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e19c48fff263c86421cc79f05f56fa296a12861bb4d60a7640500869a1a790. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMSAV1100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb27873052b69d65f16d4fca0f8e252fa74315214bddfe000697892899207bb. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMSAV1100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c82021036a4f1fe4aca5a829ae94dcd0fc0e280160d384f03464723b0c771e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMSAV1100312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c55cd089dcb0e7c7f4f32e643c6720e67ccd71dfde1d2afe17a38fa4968537. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMSAV1100331.