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 0x5618d4bbc601500f6575a276f4fce65c20559c7c919612d3598fadffa867269d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87d2e294-9b53-48fb-8add-6924e322616c.json and https://artists.proofprofile.net/proofs/artist/87d2e294-9b53-48fb-8add-6924e322616c.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 0x79192a0e83ce1c085b0e9944acb45925056b3265433aa0c1c8e3025d1ed36f67. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZYFZ2481743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a03e6fe26fcdb4089562001076baea68d9e37405df68eada59802dd5eac96e. 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/QZYFZ2481745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420938b1930e60754f989832b15fba5e8bfc065280ae4c74344ab5dedb35115. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYFZ2481747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f9de5e1b34813e16b05e492d029fe1fd3b6bcfad610aec5f2ad81ba031f5a7. 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/QZYFZ2481748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f56ef1e2e78c7ec2ce146a6df1325326ecb493355d697874bee58c0bb4f855. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:13Z), 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/QZYFZ2481749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6c208fa87d3024e2e849ca6b703826c2759dbd239f232333d3411840d51c64. 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/QZYFZ2481752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b163c81f8d8b1ba2abf6ea7ab625e7ab961e0dab429a7f7ffb05d00a7e18c4. 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/QZYFZ2481753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc525e3140811e8088b7313ff14aa2faa5298b5bf1a67c02bc58759d8844eda98. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:15Z), 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/QZYFZ2481754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513ad897c5e1f83823251324b5a4f98665fcb0669f5975d9d5e330551cb9cc9f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYFZ2481758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04add4b3a76eaecc7cb0cdbbcbdf79f664a4a82b6cdc1489404aa7eb448e5c93. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZYFZ2481760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9fa17da757a4d4e3bcf4061a562c200241b633f3f0df7b584f16c073922217. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZYFZ2481761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1651744a75b87998b38266a45461a20b8ffdb8baafec06546782d5564aa815. 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/QZYFZ2481762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dd494e260534300f8327e455ea486615996a5fa780c558f4cd24f8f6bafdc5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZYFZ2481764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405fe2b3f69e992a8cf9a699beb380ea7eb37241ae9cbf74bbf88e8a6dcf1ab5. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZYFZ2481765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c336f63efe7b41fdf6564c1923a84723178500e3fab68789f8953cd25264c7e. 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/QZYFZ2481766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459c6ad434b314f2c40b4de205d9ea90022a319a7493d7c09e1c94edd6d7c570. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:38:44Z), 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/QZYFZ2481768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8284719c5d6cc02850de1667ad8f91d48bd0ea42dca3bddeabe65a16c9e67df. 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/QZWDW2564661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc6eb6838de693a898e73dafc36da115b099e0377c33c69a9bcdaaf62ef1cf. 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/QZWDW2564663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25fc27ae09f59866855a69a35ce5f3560b50b831e7ddeed9e63db822fe7169. 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/QZWDW2564664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb790529f280477da52304f7206f12faa99b63f7ffdd1769166cb886a3a2acbff. 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/QZWDW2564665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0cbd516da1e2f386dddc838d5d36f0e779c194034d342714648c4a68d0fc25. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWDW2564667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d46df5c3ef5eb6e35aa936c91268ec6d8f091ea1126be6459cabf105afe9339. 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/QZWDW2564670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4718d89c2bb52f9487337c6e090d16ae81b0d7b68722628187ba98a5f35a3283. 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/QZWDW2563745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f6499e9e143c23a5f073de84696933f0ac3a91661384983d3ac35a1298e1a3. 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/QZWDW2563746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7cd29674bb7d736ebbbe9482e6d8dd119e5d5311010b0417eecc1b2926c4c8. 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/QZWDW2563747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb9bad67cb761fe06de12bd8586f4ede8a9f9d0005174a64df922958a71b9f5. 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/QZWDW2563748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c6264c83624389453a641e8fed6c585b1e9f99271e41441f593d178634cbc. 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/QZWDW2563749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa619ec937579e843fa1dec4ac1d4c3af4d38fead03db79fee96a06591036b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWDW2563756.