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 0x623ef9c9c0ff1e89b91ea3b56436f52c6c640d69d14076529a6179af1fc49981. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ebd780f-1d9d-4059-be50-8c27975a3b64.json and https://artists.proofprofile.net/proofs/artist/0ebd780f-1d9d-4059-be50-8c27975a3b64.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 0x2580819c2dd1eff6eeef28734cca6de45b3098c09fad73af952a9fb0f76147f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPZ921310245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d299c5784d06247dc874b2809edb026829b62fda7d45223f7e2ae1a4c750924. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPZ921310246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790ec592d478c5381776e73dc46fa6f6701961d3391f7de9dbfeebfd9f0c1891. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPZ921310247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a5b4537754acc00d12f5fc605b8180c2134212ddd51307add9d69cd7cea8f7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPZ921310248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f9ac1041aa0b6ba1f5cc7ec13f881c0a97d06a86a7aedae04be6d90356189f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPZ921310249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dcd704a892f842cb79ccd6ffc98ed5d6e9f87939fd3df47e1dce6f6727b9f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPZ921310250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad44d2038d073d9a546f10cb92aec656a0b768c1dc545a315c282617a7e665dd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPZ921310251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4418a9f9ecdacbee18c17f58fc48151e08e726447334760606f9cd5c897ef32e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPZ921310252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbbced2e9d75c41399c7556699193ceba2b92d4133584811e1e33ae6c645178. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPZ921310253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f2e2970b840473ee25f56e10c7606a2ccb8157e2b5adaf14fee5cd35f92a79. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPZ921310254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77ca34eeac5f36e031a9a5f01ed40397339d8db3baec6809b51b3c7379889ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ901003520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1db41b5c5e26c8aefed409859cd8bdb9e004206bee7ff6574205c6c6490ad4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPJ901003530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cfc9fda60944163482272a26acbbe417d8c49079748d62119058a1dba8d954. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPJ901003540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75957c6a39c884fe8f0c1017aba9e18a7448b68015274325c64063d5c37e5be. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPJ901003550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb98cc8c1ced2b93e568daad11506b0a368c7a2a62409eab2fd0ffcf9bcda8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPJ901003560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b149cca6227f18afbb38a34c8de28ec0c66024188dd9f9a9fc46b1521a3089. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPJ901003570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1e78f5581e45b04866c8ba36e3560ffef343328269d0e52195cd0087de803. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPJ901003580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcef377e906b90eb3443a550d61b75258cb6326a80bae528ffa7730df0726a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPJ901003590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173836a31e8171bab045371d7b1986b10b2f725562155e45ba84fb289674b83a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPJ901003600.
ハッピーリバースデイトゥーユー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7831ca7b4cbace5128d89c2488fffaa2aff6128d0f55d9ff29a6dddd8d7d807. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPJ901003610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1637a07c29865ade0cc73846f5f1c4fb8d02f69030fdfcd59bed95ca4b1bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPZ920706158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ea7749d522790b482781ad6cbd74309e572c8934d8e26b0648eb90939a7e71. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPZ920706159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afdbd630a2f51f731ba254b7aebf8a89821bb45c9239935ce49ddd7ee2904c7. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/JPZ920706160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39b83bdf8ab93e9422e8f4a4f1678536200d8da4f03906d8539ad95bf4dd239. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPZ920706161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd024fa2fbacab6948d7a6876aee27e0a2e69816d2e1af10b1ca23ec4ab973eae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPZ920706162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e4b48745c8e67f30b861049bfaa716c449bff4241f501097bfcf587f07d4d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPZ920706163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bee73ac4e40aaf26e9da522d0c411804943d4c117fd75524854437bc4a30bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPZ920706164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce2487e53b7dc76609c167e525b11424ef1141c0a1cda00b5028394fb297063. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPZ920706165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124f2da36e84adf1995c3bec993f91484ce60cada3e14a5a4c58eb821bd241a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPZ920706167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a510d378cc476a6c9f9a7d6c8a26c4c0a7804de39b6995aaccaf2c86061ff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPH100500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf585ad2538b337d7df3c2a275905de9d2787ba6a6b94031c292b9403c8522286. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPH100500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ea7a99ba8ce9622967a5053de2f023a28a5d0b4eea5638f9b0af2fa8bb73b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPH100500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66771b191420eaae1b23f5adff67e441abeeb11179cc73b52d4f3de20a2cc702. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPH100500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa292ec171ace133b6face79f8ba2da24295609612754bb6ccc4736a3f7c7cf91. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPH100500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d4365ee72fb6f93a1af25efb708071b910552fd14f2b335ffd2502c8474e13. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/JPH100500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa590a4545feb3383ffcad4cf4878ebc3f74e9598858787affc434598a550bb39. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPH100500020.