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 0x2b8bd1fb69b10c81e36bc4844362c8ae1f16c23de0e86eb80050a0875f7d0427. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b21d0b3-c98d-4682-b751-ee57398940a9.json and https://artists.proofprofile.net/proofs/artist/0b21d0b3-c98d-4682-b751-ee57398940a9.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 0x8e41d588672e7b0ee7e1e1863fb347a55d95201d58f8a1ddc799c6b7810d28e5. 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/JPPO02201474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3af289647b38f000b97ac9b69abc5ca5e5aeff68287f171add427dc6c2a9a5. 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/JPPO02201477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdceccc3180e0bf6a7a2b2feab5a747f598e27dea6d7a181425dc26884726ca4. 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/JPPO02201478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af9fafe451d4117784ff8909200a0420c02fafdc6631cc8228cac8c065a04d7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPPO02201485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fdd4e95cb6147148225d15b17c576efb42a17075bde6dcd296f4cd22ebef78. 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/JPPO01904862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0c3a3e3b6977400ac7a8c30e4305295b78743313e19c9f6b2e6482f2905be. 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/JPPO01904863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b37cb330bdba50b4eadc63c7eb0d17dd1e9fd2f89b5266d21029a096f86742d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPPO01904864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2089d523cfa864d76bc66260b65385e2a2607fe18508fd23bb892477850903. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/JPPO01904867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ab995a9f281460690f09db59031219712ad7b969890b8ae92ec5d370ce8c03. 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/JPPO01904870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875ba9b28cbe2f0fcfc12e812e7e9cc85de74bdcd2a2c6364c513a0a7768402a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPPO01904860.
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 0xe458cdf5f1fd719d59411cecec86244f8bedcd020f9fc0c5d23e438f95dc0a52. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPPO01904861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ff461083ee1e8838320dd52ddfe34161d17b780b38ba6c9044afea57550ae. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPPO01904865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdaa6bd9c4ac090293b944ce0e2e5b3969c000ee1db8a2608f163871bc4f156. 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/JPPO01904866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf027647ead5e6aab9df81b6277af09c877f66e38d17381815f67eda25f7830. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPPO01904869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19e3f115193df78a2ca148f536f6618011fa51d06b48d34844f8e1ed6847210. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPVP00502202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6cdea3603499a01e3118a1b573eb5da2bc3cdfccdda73d9f6a265698e9e27b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPVP00502204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7065c4b55ef4c41cef2512e4e0ad21b0251ba572795068e46eab581a70bccc86. 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/JPVP00502206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0990c2f5ce8548905fea2cac4af4c59487edec913e4832bf8637ee8203e16b0d. 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/JPVP00502209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7670a9fec8c22a38e0764953e13115e577864486d7620169686152026a893acc. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/JPVP00502203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a8e5486e86bb5e8656738207c8bbc788f31a49d791b82634d85e667ad9ea8f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPVP00502207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e589cd0437ca81ea95a6a9f7a52109014991a438271cbcb6525e20fba774845. 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/JPVP00305802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c93395ce41c51d812c292444b521089d5ff451954141acb129715d2a31112. 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/JPBV00000606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946782f5388ef9b6c040a3810b94c490433b7e1e3dffd319c938ba8d70fa4423. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPBV00000607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa391d5320fd447fbd2805a4301d3e696ee87a1d23d96952129a9722eace88923. 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/JPBV09900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6515c327e08898a8707db9720d4e1377fa7bf0f2f5da722fda97786cfa4c403a. 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/JPBV09900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe35b5ed012b9554d225aaca13b96cf44c05117aded85f750c8881734d52510c. 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/JPBV09900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f98a4d2e413f1f38d3099e9a3f54f2012430f9541197270835ab14b70a1be51. 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/JPBV09900245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6015a4e8695a8ca3b9dcac17f7262c9557ec6d500db5f34b272f49e9d01bf9e4. 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/JPBV09900246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfe343a8c2ed4d275b00b11b9ca2254c0bbed616ad0ab5293a64583065bbf1a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPBV09900238.
猫のいた暮らし(there was a cat in our bungalow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeaa0e0796d8e33d0c462e2cc1535726ee088e3a2cc3410ecff8e520317284f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPBV09900242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1cea1c7904633182bc7272e646d92d79d1aeacd24d5d967d0c0de17c240b2f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/JPBV09900247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacc602dc3150bea4f1fad5c91364ae786d4cdc0be4087d640181701e71e8e48. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPPO01903919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37270ba38414057d4292bc972e28f7668ca24094b65518f26d4e38ca0971626. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPVP00311601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6127b0948867216da9742a75d34b8c4866fce8e1a4b99a2f0e557b983add35. 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/JPBV00100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eee83cf04de56ba35abfd8facff84fb05729c0c4c1b232f9fea89988ff8a20. 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/JPBV09900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97efcf3605ea0782b3181a59f26ebe5f01785b5323710ccd113851b50169174. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPBV09900915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3329317020c97542b9f78a9cf2125b3df2f056b74a2505bf08234fd9e0fb4a09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPBV09900916.