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 0x5a4a4ed3ea15f8153216cf4fe1c8d2898d6b1c405ca46c55ed150aae9677c63c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8b48acc-feae-48f4-8b41-527fc9e8fbf1.json and https://artists.proofprofile.net/proofs/artist/d8b48acc-feae-48f4-8b41-527fc9e8fbf1.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 0xc1a3c549276dcfedb35f1cf8852448d4639a63cd6dd5a8234237b2a5234d9897. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6F2532366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dab086986a129a572835791a9dc3d88071666485b493c037308f0f9e234439c. 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/QZK6F2534024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa36707c28ba077e5021468f412d64041da7ce62b6589df95e9b475e356436. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZMEQ2531311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f45cc40811c2ab1736249439cd00e5d6ba59dae4f4bccfaa951dc855204207. 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/QZMEQ2533798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f012670289bf6e288f5ee9b60e0074f6e09f21e028c4867df5daf347a14e2d. 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/QZNWS2529001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1901ff4b00d5b12ff5784a107c962b69b2232924c3b01f0f81ca737a3fc29b6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:30Z), 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/QZNWS2529004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1901ff4b00d5b12ff5784a107c962b69b2232924c3b01f0f81ca737a3fc29b6. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWS2529004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9105a67daab63412326343ac067adeca1860a443fcd88577897b23d66adb2b91. 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/QZMEQ2533816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fca473147deb3246902db0df959f0ddc0a56ea1e8e270741faa555ba2e759af. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWS2527911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b1fdf59f287ca3c230bd87ded024207da4a8b2dc631b84e793a40ef7104888. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZNWX2507720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6110b2c8d5073972c6395199d4a89f94f6ad03f14f911f204fd97ce6440c22b8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNWX2505650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ea815db906a1bd55887ea20a1dcc19e28c72267f4b666148197798c8745f54. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWX2507722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ea815db906a1bd55887ea20a1dcc19e28c72267f4b666148197798c8745f54. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:44Z), 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/QZNWX2507722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77074719dc1e69b0502abee45462ac3450bd0100f3b796e782cf00c012da3ae5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWX2547229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa4c5b9657bdf7ab03fcebb12fd7247a4e9b0c432a0891aba21d699901d3970. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNWY2567075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa4c5b9657bdf7ab03fcebb12fd7247a4e9b0c432a0891aba21d699901d3970. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWY2567075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca714c405f6f24aa0674313137095d612fad2f64838a9a1aa1cf3b6a02ec0be9. 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/QZNWX2549199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77074719dc1e69b0502abee45462ac3450bd0100f3b796e782cf00c012da3ae5. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:11:00Z), 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/QZNWX2547229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12112a5a46dd18aa5a150fd5a37fd5b89cb77aac221165c0644a5163aed7094. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWV2474139.