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 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 0xcd98923df477f66c4231196bf58e3ef31dbcd6a3a66bb5c28b55910b200d4ca3. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1088deb2-f54c-4b8f-abdd-e16d650b1035.json and https://artists.proofprofile.net/proofs/artist/1088deb2-f54c-4b8f-abdd-e16d650b1035.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 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 0xa3ca8876adb044776039ec3ede499bc674d14f999a82f0ef5a92c20fd603f44d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZMEM2180297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ced2c557d5f4dfc0c04ac9362b12d202e6b8f9f070407833e670e140a245721. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMEM2180298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdee8077b2f49c16a74a9489d0863210f45a8c0d6f479792ae4fbb188baee55. 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/QZMEM2180299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296761036209b29125295b6e7f8bbf4614af23b4a5cb5e05b14642edcb0c50d8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZMEM2180300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bad52871c7c12469cfd926838f67589f5530d873014aa27d1daa0eed6edf43a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/QZMEM2180301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa75aef3e527d115ebcf4ec5c666303bcdc5e0f97cb30e642522d34a3b0240c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMEM2180302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86302501936a9b083a049e73b537e97441ac3824370e7b59132d092bde94ed81. 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/QZMEM2180303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17349182b06c2a0edebcc3de02b6adc3b6612f7324d8dded30d40b6f35ec9a4c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2180304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bf558d6b603bb16369b952a8c9f51d3a5db81b38646af1395f61ac73fdb8ab. 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/QZMEM2180305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6612e02883fb1dae8657d7ad59d6cf2157cff23c1306b2ea2dd2db8faf8e8d23. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZMEM2180306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8061d9980a3118ed7fdd2350fda7c669bb6d11bac05fe4f29136dac8c619cd15. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2180307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf014475cbdfe048576ef0341493624f87f6e440046a4aae623d8384f1b361990. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMEM2180308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b220f2b5a4cd1c854055f86cdb2dc53fb3a1d941bed495f1471048336c317fe. 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/QZMEM2180309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e24f8c25ac0a3be91d360884fec8efceaea4d7be0e06c2d1d38288f045a5c90. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMEM2180310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb7ebbad22fbd76b9449270f0551b3b984bd8727127349276cbda58d4232903. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZMEM2180311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa365a3b81fbfadef3e3188fbaa106b8cf6ea6eb9e8457c456a848996b92e2fc. 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/QZNWS2295599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3b7b55907e2d55482bf2fc41cd04ef055c51ea1f451aaba4c70b0ce828dafe. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWS2295600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ce3e350fded15fa7bbfe87fb7f8676657966c8bf2055fe1f2296adef59a2b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZNWS2295601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7301d06e18483e8fe645c00918c3ae6c0115fc55d48d7cc0d7a5c27f17b33e1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWS2295602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9e36e776cd4994bdf8e3793aabf88f6e6ccf20cd6333bac9b104da336d310. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWS2295603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cc81cf851c84526119411f8d05f078778840e5623fe0b341ccf87a71d7ba2f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZNWS2295604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ffdc36f8794adb568581b424e35e61ca7dc79de06de4052a4001073379704c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZNWS2295605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e163247be0ada545e6820360e63c61d1ac10729e18db2a33b9b4647962f2dc0. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNWS2295606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04abcee1cf8ad01344139b4182eba17382fb5f2071f21f8b85671903b786bd04. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWS2295607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68719e9497f42490c8757d22de8ad65aaec4f9948780a4a90b135e1735db0587. 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/QZNWS2295608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51784aa31e64dc723b839979c893393d8148c5e447c372d914b739a386703386. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWS2295609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c69e577f0291ccb9843c8364b8c6e9111b944ce1838795ea26eba7de08a241f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWS2295610.