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 0x23b52d2f1df76d0c3d55001cf0455562692900d1870a6a88b5e921780d840f26. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d4be709-90d6-4d22-9c9d-6a133f7ca2a2.json and https://artists.proofprofile.net/proofs/artist/0d4be709-90d6-4d22-9c9d-6a133f7ca2a2.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 0x7fb8789aaaa7545e2c71a03afeea78ccf53626129a55bb72c2a813ca760e402a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6M2542115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11e0da61db31d58b02ff4ad6984b629107548f7eb3998d8f9d612b767c09cca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2526690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8605ec135e4a454969ff0903d4ee7bd993ff6fee1c2ffc62b7a1529743d34573. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZK6F2593303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9697323ac33a9067ca7c56f4087417b0a6d3e16fdff769581668e494ba1e5950. 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/QZK6F2593304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421a59ae68f3b6513142f28d28e1f0703172e666f508bbb52a2d2d49f8130a8. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6H2583387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9410c7d498ac3c7a71dd0339d3dff0baa5bbc204a2aba0ff4f895a33622560. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6F2593306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ae5885645645719994f2e66b52a5c8282316f5e4fe9d79a056ead0d87512df. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6F2593307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b438263a37341a0e012ec30bee49cf2e8d817c01b164e00550b6eaa2c922e4c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6F2593308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17cf56e1046d7f5db0001937fc95d4f71bcc1a169cb79cb44f2835f8bde61bd. 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/QZK6F2593309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e09a12265f7b89c9ffaa6933b2978cdee2b62de9b74829e6e29c2b8c80465. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZK6F2593310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fed8f789fae492f49d1422bc0146718b1cba16c8968c2244344e017e959e1c5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:54:03Z), 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/QZK6F2593311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b5e5e470858398f42b536161b1df9d7d8d807c375a1688c31ae04b772db651. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:02:55Z), 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/QZK6F2593312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf804a09bddd02cc75a1386894e56b9a1d5305cbfdf55c2947894afe14d9bf23. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6F2593313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43e1c68e2356cf53f47243dbd95f219dcf870961bb4b179aa412e98adb27005. 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/QZK6F2593314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d79b8647a1761b1661fb8cfea451b26f36e2d04f6b35a7516759cc8ef6e1e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:08Z), 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/QZK6F2593315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451107730d00f9ce677f0eb9fca2d8321ea10a27c0471702a64503361d4c645d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:04Z), 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/QZK6F2593316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8381bb79fd70e7dfc390916456063627670e04abf781c6c6b5d9cfb476e50505. 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/QZK6F2593317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22227b4548d762bbaa7f1565656a3274d7bd58d5909013c00f057a199c7df2d4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWV2516264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a359f721df830740904f0cd553181ed7404bcbb3801ce6cbfd6ff70c9a379. 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/QT3F72528083.