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 0x633425e20b69cdb644be46e81e09d6f2c5c74e94bb2e3f5d2e67b5366d04deb4. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1015cb83-2c65-49f2-a7bb-233bf42d7c90.json and https://artists.proofprofile.net/proofs/artist/1015cb83-2c65-49f2-a7bb-233bf42d7c90.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 0xa09b0e1d58ea5bfdf0316cb9ea168e02dc3f55cdee4d9e7ba135368de3e140d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG731875230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470bf8caec7613b856abaf9d350a3886a092bf6dea419a5a100e76c47651ff7d. 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/HKG731875231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a69f49cb890dd3148c96d4c6c885564abc56c81ae88199ddf5c05d1d2eb2972. 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/HKG731875242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beb8cf828008ac3a8342e21d5570d5ac629dfba0ef1bdf929cdfba90b8d5191. 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/HKG731875244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a136a715802b54c749651d4cc44bb06b561f6b3a508a65c43ed104a68768a. 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/HKG731875254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d75d79597b8257499b0e511bceadbcbd90b41467e7828ce8013c7cbcea2f39. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG731875255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aeb9c55e9a44c0caed7041ca74ec9dc2d14e13303ea43c02bf9b7d779514cd. 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/HKG731875256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff57f2a0d2058f0bfb9903ed3cf1622eb7dfefec183bd7a894d1a8f72ee791c2. 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/HKG731875258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab85e15c2b2279ec580cfd8b9fdd3567850040d6427eeab1fe548df31d1e7b5. 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/HKG731875235.
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 0xadb79b1907341fab2a412c2ce2ac6d5d3fc28ff34dc00b1b549535c3d9f6d830. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/HKG731875250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc833173a1d4f0f36ce335018f6d48e97569944a163d851b7db5424518e0a44ae. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKG731875253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4e3ce39adf9961321aaaf41aacf7ddee4947a8b9a9bb97b2650953e331f790. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202111253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e34a3bfdfe2162a83ea0d82e86ce39b3e04f10b06c094dd6072fe4a84fd7a9a. 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/FRX202111254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa74968ceb6ed67bb33a1b8376f4e48aa8f930a091476d2f4215f5c1a038dd44. 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/FRX202111256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf077054712440ef144efcfdad71a71bd9d55cca4a819e9b03ff99c0ca44a707e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX202111257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64f984e0914292a988c8ecdfcdf950b79db537be2795dac1c38ad8ce2b33050. 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/FRX202111258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfd895b675351853b1d6a5f573629b77113b968942461bbccd0b8004e9f531. 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/FRX202111261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d7da68dfac445cf9ce6319e92202ded2047d03388c207e75652f5c9ef99696. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/FRX202111264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d948d813f2122041753ce250fc21b4b74bee6e3904f8bdaa0aea9506498567. 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/FRX202111265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ce70661fa0ec55b2038e25afadedffffd88f4496f213b2e477533fab6674d7. 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/FRX202111268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1018a2e72728b2320b7309001710d8ceb42602d5a0c86cfdb24f4d967553e6dd. 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/FRX202111269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78612ec347aa65911cffea08521597c0e985d28ba6559bd9a2cc1e2b3bd3df4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX202111270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6808a029091726bed9663372343146bd1a974e8e13a66daa43eeddc98dcef0f9. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FRX202111272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb46fdea4cb58d9fec67e86937fedcec0515999927dfe68da3ee864bb51b205e. 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/FRX202111274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559cc16490721d069b991f9eb1b441fc4dc3a98f1f768aaff7e2dd90a0ceafe1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX202111275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f28eda76b3c9fd1c9a06e159084a51f340890e176cc6320656fa85d27ac6a2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX202111276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc6d5a6c9990a069f93d47ebd31c7f21df7254bd558eb7bf9acdbb7d241f55. 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/FRX202111279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe660aeb12b07d9f0b7979cff442b5cf50411b11f1b4ce1b920161a922ad22084. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202111280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddddcfb743f9b3222826b465071853e37bcaf48cc243f104e51b96117027f96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202111281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27231e926c5acf8a06286727b9daf17d83342e4ef07bc6f9808ae222edcf0ef. 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/FRX202111282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc944886164cea48ed92eb204f3eb8bdf55bb35a2d501eef4a38850aba0990f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX202111283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41a502c32f724cc8252d9b9aa2594a4f09f509963f7515452ebde39c3ce348. 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/FRX202111284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6433d571e43d6033c0cf159fbd25cbab6ac37fbf1aca207ff0ce8feb868dbc12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202111286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c389923b2fc98df9a6ac1a587e94ebf1c4dae9b61d9fee5b956db2839e7c26. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX202111290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3e21d61742b120f6cb407f7fe3c8051a091507a619e55cc9add0858adc6a6b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202111291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488ec98adb808646305b44de072d617f431fad4b2b9d465333663820d7915ed9. 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/FRX202111294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702f8348a3ab2a749d55be6020c99cdc42d488a04fe72b45d2120cd675503204. 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/FRX202111295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e1cc10da2db928224a598c864fcc74c4ca8bf136563d6acd0dcc9cfe074309. 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/FRX202111296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774cbcb1e75765388c72456906ea06ee5b1463ab6255f80c900bb024178d3fc5. 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/FRX202111289.