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 0x39d870e73ab01d790f2b877f86ba0be47e0f7e06d787b61e0cd903551a9750b8. 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/4efedb31-9753-4a28-ba74-00b9cc587a90.json and https://artists.proofprofile.net/proofs/artist/4efedb31-9753-4a28-ba74-00b9cc587a90.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 0x65b551fbe4111b0da37eddb50137485ea51cf2d6377e51640b6f0a51a8e2cb62. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:08Z), 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/UKEX32363067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe758760098df1b2e5ebf591fcc9b927e80e6c3307f5c4db69e9cdb82af24047. 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/UKEX32363043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d03f7971ff8fc1e4d57eb7c268fb6d4eddb8cbf796823dd74fdf26cf241ef7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:28:04Z), 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/UKEX32360824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d7c08d67cdd3309007181d3eb7c382351205aced03e41167f1744e50f781e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UKEX32359001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba37158b5a13c5754ff908db49065b19ff80587fcc5045929e41c6d9d1aeb4cb. 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/UKEX32359000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfebe03a969475e257ecec1c214cf1d18af9bd788882fc22370e02116469354e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:35Z), 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/UKEX32358828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc909f116342a177f8844e8bff2a349d221aa30a133757473ca2b7d85db2335. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/UKEX32358751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d08c1b6d0155c3effa7d18f3e949c5fe85db260da44f3b7286c36c3878a60. 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/UKEX32361104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5661b439b4d0d4eb9b192f82569724db15209c07f2141e8a56676b2e697b03a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKEX32358752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8579ad5de12b032137ca5beee41c982d0cfaab52c44dc6bd168fa06a4f17c0e6. 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/GBKQU2501825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd080f72a5924b99b76e83ca38f2610a1253b8a138503c6787c2210b1dd3b10. 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/GBKQU2501824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3c44b33241c734681f810cc56a4c9a09406dd8180a68574a2eee88b12b2b70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2510600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fcf316455c2bc750f6eba04b829808081764339e2cf1950ac1c410efc72447. 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/GBKQU2501823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac762322089b4140b1daae9f89b401b2bb2295af9be0fa4879685d8c7027a6. 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/GBKQU2501817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ecf185000a44fb7715cc1567eb0414f1120eb08a96b8253472b7eb3bd25710. 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/GBKQU2501815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbbfc217d400c54542a1d786919e51e5bba7f6ae6a3e42f68863030d8443046. 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/GBKQU2501809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1d7c7a1a3434051d7ada038838e75f60f66e5a693733aa83a72cbded0a7af1. 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/GBKQU2501808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d727a14bb2e335033e762f43cde6f9c42828090a1b16b7cf3e73f9e5846358c. 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/GBLV62422909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4f05f525cab4d5c88205d0c510455481feb227bfd7a274f80183ae381669d7. 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/GBLV62421847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9de01ae98d00a231ff35084833e4bb47246e1d1881a82a1606c01a867eefd8. 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/QZMHL2552982.
Paranoia（COOL&CREATE Remix）(feat. COOL&CREATE / まろん feat.ビートまりお)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d6d2f673869417e4819b1a42760fab042e60d7acd6355541f1bad1238c171. 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/JPW561907108.