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 0x5bc8ba3e4e35248fa6c8930689f8ece5c377b993a0ae8197a5412da72fb30ddb. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/242554fd-6c91-4fa5-9a0f-2548ec9280e1.json and https://artists.proofprofile.net/proofs/artist/242554fd-6c91-4fa5-9a0f-2548ec9280e1.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 0x30437493a37a10d26415fae9ef8d830a79e21835e9f9f0e18c931b5606ab5586. 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/US8641511901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8dba15c55f4f9878ecf46566218a907be0a92b1e2347a25615bd83c791b04a. 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/US8641511905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a962654e4cd8eec7499d06628b7d63fa0ca26dfe16fa39d495c66fa9a3c2ed. 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/TCJPP2139688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b5b742af9cfb245660de39135695da4d176c3b7504031904de88c595daec58. 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/TCJPP2139693.
Shumichi Nagahama - Live at Aichi-Expo 2005
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a6dc382840b4aa99e0a3bf77b33f511bc9bce67cf4112d4f15ea158df60da8. 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/TCJPP2139696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bbe75951e485b2732a0c4ba0b28e67109e3bb80b2ed8a1d37e76785ae28379. 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/TCJPP2139702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a48bb30ed1167c28d8b4f9b6a21cec125b1cbc8230151a4110fe0cbd41bbcdb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCJPP2139704.
The Best of Nakai - In Beauty, We Return
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfefb8fd7bb792c6489d0caeb3896e4cbddfbb333768dfc20d303344bc1aaa4c. 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/US8640561201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677df76c56070519689358e3cc67b0c486276e6a55f125781e4ba231bba6cb41. 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/US8640561502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35c42cdb1e618b5187c7e0197a20afb3ca3e498902503c9c75bdb7678bbd9d7. 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/US8640561001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103155de9a486f92fe289601881e41731ad3075672dab725ed855dce2b02cf61. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US8640560909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b4cf8202298690d848470cd98d7707288440da7c8233b505a4ebd1149c5262. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US8640570615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63063df15fd04e2e601bb5327eb686cee2ec7b073c9d02725cc8b1b8eb3ea9b4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US8640572001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433cc2991c9aaf9e0b59b8540bac6bcaf19bd80e25f991fabd2cc889a8d83e54. 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/US8640571803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3598c07611c255f0eca43b97fd3fcfc66f7fcd9ec711a245f2a715f435e2f1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/US8640571102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782f46540a9ab073fa83f515872db3daac54158ed8d0c162d86f63ef1fa77ccb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US8640572402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426d145a2328c6178a9ab68452d141d000757a5268f25c123170a0baad98957. 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/US8640574204.
Two World Concerto, Movement 2 - Lake that Speaks - 'This trembling of beings and things'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8ba13ffaf63a2e6c1b3682c4cab61abc5af793bb9581381d1bab7d184bd8b4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US8640571602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b3e00b360fd0940c4d8da5cc50fe8d15c6ac55650c63f1671d7a11bd6e31bf. 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/US8640574602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25177c35481def586e7e64b8dbe947c17c719f61d1e22b94d1cbad290a3d7272. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/US8640572105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047588bc57d08bdd992200f2f114d3fe8f4514bd3458a2ba95a53278e79fe203. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US8640571801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3713b81f36613245f61fdbd2815c7ecf14de5cfe1a341b99d442df57b1feee3b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US8640571802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433cc2991c9aaf9e0b59b8540bac6bcaf19bd80e25f991fabd2cc889a8d83e54. 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/US8640571803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f3f811b56db3774595e8e4672c13ea023453ba17713006379957ccae62d25. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US8640571804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd0d157b283343bee16c5fe542bf13a5370fa3ee92a727c65b9d9a621190668. 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/US8640571805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8dc823e3ac8f9131781b2979397d0c8ca9fd48fe983e6b8433e3a7d664a251. 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/US8640571806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae76dad0399a2fd38d6351899b33c336867247978ea774ce0f7875c944a39aa. 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/US8640571807.