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 0xc6ac498e3bfd5494105ae1176adfe9cd056fbb5113c20a0c85571465734d1a0f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d479945b-6a7d-4d12-bc81-4235a76b7094.json and https://artists.proofprofile.net/proofs/artist/d479945b-6a7d-4d12-bc81-4235a76b7094.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 0x8dc0061d3dc0cb356469ef1f7bf6f4b43db274534457a74ddf1da34afeec2a7a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GXF9Q2401723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881a5d660301bf68dd99f2ed64ba4ec0f10d831d0b6d0af63d1a9138c290a688. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GXF9Q2401724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dcd43b7435dedb6cccf574cb0f11c9046f7d5b9f1c0824f8e7f99b62ec6b77. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GXF9Q2401725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8514d9313cdb298388d5efa03d928a1285712c6a72847e75921b316003443d. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/GXF9Q2401726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda909ab036d94d642a2d10994de87a9abe212862d412adfb23c32b14b4602d6c. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/GXF9Q2401727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfa7fa4ac7fb41c2d7abe06ae752945ade9a04246793d3248ce40291c257a38. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GXF9Q2401728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689b65df9076d6fe2a3f1b56603903e61be0c7749c34a9596e9a4220ba75adcb. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GXF9Q2401732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66c8df4be3164e90a45d60b5389ea9b231f2aea9adf1a4bcf2774d4b653b4b0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GXF9Q2401734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8247018e60ed86298488f5b4043c912f0634b2efd0bfd4d86aba71cc87557712. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GXF9Q2401735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb194d7abfed76dd14b69d8e51f2910d4c0975d7e883568931a7bc3dbb1efdfb1. 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/GXF9Q2417574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2454ba6be8b1cdf1f2991f3f1090633d44de6b3ed531191bb19a4b454dd6b973. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:07Z), 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/GXF9Q2417575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae267e52ab0837b21233c6020c779a253ab06e63ceea38c64c41168263bf5de. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:49Z), 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/GXF9Q2417576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa499fc9777943cb84fd1d8b186756833d73ddf0e123eb7d926865fa983e970d5. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/GXF9Q2417577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b09b8508d7c6608d0235ff31fd42659d00d8d2f0fb9832d415b02e42247cb. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GXF9Q2417578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1436e807308b0e458221d26c626756d37b7d12a0666e49dc90b55bda014aa. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GXF9Q2417579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fed08b2fcc6d792c47e00a866f7339b8a3346931222466be39412581d801aad. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GXF9Q2417582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef7e4fa17a1afe1408c688318dba12e34a8d004b48458c394fe362f6a5dcd21. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GXF9Q2417583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3454ae63e490339bdf03899a2b5c7593515128f21fb432a603aab780729d1. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/GXF9Q2417584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7bea42c5b587ebb9b2fabfc736fd2b3c6866c8847c1835f21505f7e98bb13a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXF9Q2434726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2314fca5a3d4dcbfe75dd69b520caa2753e39170d5b0a87dcacd1a0216905. 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/GXF9Q2434727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde8699b7b0942862ca9fd672c16e64da0e12a9e286665a9890c062a49684320. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:35:57Z), 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/GXF9Q2434728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81ae90354d964712fa0bd1bfc7232d4b8ea8418967faa23cb64466b30154660. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GXF9Q2434730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb311b936696d6d667a1028dd840f8d4fd3f7d9e16c1e64c62b752b9db0d6554. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GXF9Q2434731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96dc6e2d8c355061319dc9a2f6889e8647ece72011e4716571513d4f2141a77. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GXF9Q2434732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04b6d2cc057a49f5568704d7ad47b8b4f6ecedc2315c430feae6721d4b47df. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/GXF9Q2434737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55aae1a88b809287c3eeba074fa4d99a18ffaaa32e4569f0dfd14e91a586237. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GXF9Q2434738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb033a7d7ed08bf86e9f613d5b05e907d99a03a3af73d389797dfe0a845e436d9. 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/GXF9Q2434739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dceee85f0a9a1d07dddfbecfa0ee3b79ae85e842fd98b521e07de068549e794. 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/GXF9Q2448901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daac5b32fd7852e7406a39f5be3299c448821768df835dc9bcbad2b06f3d7e2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GXF9Q2448902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0544e8c488f2a76ea07d675886a70d8f49df52629281066ded48a573a2cf995b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:37Z), 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/GXF9Q2448903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fd6f2e8d85c438b84394e06a20caeb34fbb855bea14b56d08b9e93b507e705. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GXF9Q2448904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff980bd1a85db568f10a6b6a5b07dea995213bf8b0863c3c7f588ea6a685754. 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/GXF9Q2448905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976f1561cb47fad10a1afaff986bf1394c4019f02b8dad5dfc633762277dd7cf. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GXF9Q2448913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f9a0e678cceab62bb0940232140fd845ff148a80f1bc69903ae36f6773d504. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/GXF9Q2448914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4937837955b2800f559c9dc18cc68e64f98dec172e589711c8c4bdb826ac652f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:49:25Z), 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/GXF9Q2448915.