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 0x4fed1fa478832f1b0f3fa5443cfff3cf01835db1729037be6b15b4f1b67ac845. 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/ca350912-339f-4a40-8e96-2e0ba866e108.json and https://artists.proofprofile.net/proofs/artist/ca350912-339f-4a40-8e96-2e0ba866e108.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 0xaf4c1ea942f8cef33464ec26f20ddd6292c3f6963968ec70cfcfa60d3a87659a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZAKB2448441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2219d9ebdea534398e7dc482752b2ffcd815158a777b315d44a834a19c70b95e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZAKB2448442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26cbf9f60f47f50596c04c99cc5a509e265165926dca497b25d69712a457190. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZAKB2448443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b527231724d711af660d3afa0b6304f0ab02163fe49eb2684752fb5c9ed93e1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:29Z), 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/QZAKB2448746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdddb5a619c1dd6f634145b8e688a87174c5ea3cfa7ac087f5fbce626046455. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:14:27Z), 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/QZAKB2448749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dcd2f902069b5b78b20a27b21f30ae121526d19f696b0fccc165d7c1c2607a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZAKB2448750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d44022adff9c3abed1ac351f83107bb7c537b5beb4ea39f2d17a1b003c7fb6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZAKB2450262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8848864b94e0fb36aa59d6b00059ac7c49ef12a136971ff7f9c3431b250d30c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:04Z), 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/QZAKB2450263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ca58a415bc913304ba40704f2cb191ef86525156e57809864ee7a2c98da04b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZAKB2450265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31454e274d516fa70413800bd4f5f71b92bb7fb490aefc84a16faab2efcac196. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZAKB2451112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8379d5b696b92300db06e8d27c343c335af2f8e06f4ecb394967f7b5a48c61. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZAKB2452653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a116009415727a34e0b2d55fcdd36405d76c47e63a22f050dd57813b0d896. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZAKB2452655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b5123098abb174b4b8f3aed10bd0daff0537194f5d6d5b3f7a0bf80d5a25ef. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZAKB2452656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4558d4a15298cc02cbcac19eac5ad7addd1eb9a6cdd3273649d667afc13d4267. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZAKB2455529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5216f6e2919ca7e1e11e614f40dda1d8fd39167a419e00d8837bee74bd9c725f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZAKB2455530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4fd96b801755a4753f1fe0c1e53976e7590be1ac1c2aa016176964e16133d5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:33:06Z), 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/QZAKB2455531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa84c9188e1fa10a218ee5aaac46b40f1f098176074e78b9f73b94ce50e6d82. 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/QZAKB2455532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013bbf6affbaccfc103858d39508f3b76f0e168a1503f1416c4b8e84f69f5426. 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/QZAKB2455533.