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 0x104c3a3bcf5c2154b0175a620350f741ae510f79bdf3b67b83b9489fb70bd150. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eca50cc-41a5-4c7e-980a-8b61fdfeb077.json and https://artists.proofprofile.net/proofs/artist/4eca50cc-41a5-4c7e-980a-8b61fdfeb077.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 0x36fe44ee81beb034a602a7e36563df746911f3606bc3158e2b5586d7d5115fd3. 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/HKG732221028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2e5f5e74365dd6aa1e888851848f9e6955eb9f4dcc2bb990398ff12e7cc0f4. 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/HKG732221030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d7d616cf5e77a47824cb895f49773fa33a1a4fe1489619dfd66f6c893db8f0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG732221031.
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 0xc780b0ea7519a163baf02fe2620018e2f331c7f52cc132af27b934d7a7b3b7f2. 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/FRX872149402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6718a089bdc4b43513d5d1450d4afb8c57b025f4da6807ad0010368c7f1afe7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ171900278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ccef52e62b48788f61181327afeeff73a3793ace5bfb70f442e427a59d2f84. 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/CNZ171900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744b0170f7b95756f02d4dee413eac4f7b65a8473b8b8584218f7adc32c50683. 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/CNZ171900272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e62adf357211871711fb0b58785e856763b38bc397f4ae652861fb7a93e89b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CNZ171900277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc223ed6355b37a2505d613c68aebd9db68f42586e1fb2fa14d93abac8906bd95. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731674389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b91acc482e7e56f0852b7b01fc5612067d74cec130db6a143bd7a6115767ea. 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/FRX202237492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5551c001379683072c016c0929e49b23a949c0e36afbe552de41cdd5162252d1. 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/FR96X2260902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaa48d140baf518334a0918a041c7941285d510f617f805def2948b7c7cb174. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ502001315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d9b5e723c4029aec68f9eea2cae40119aa308dc07ec6d58b00c3c216f32b2c. 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/FRX872308885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04947a099ab231400b0ec195a4ecb8d2739e05bf7115012e525836d919bcf64. 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/FRX872308886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c3b2fb4ed22203e922bde3027377979fe81128d0dcdc3689fc7debf3e3f8ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872308889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b57a280daf3e1d961cd66f2a61b8c11328458c8fef611a927ed00763fa8d4. 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/FRX872308890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815b6a2c26f9ad1a1b84d74a1d1cd8d3187cd2d3275672247a1c56bf3ba2625. 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/FRX872308891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd42d53cf816eddf8d73a6f4adcc5dbb229acc7879ee0db3c80ca4a061057b00. 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/FRX872308895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc879e4b2c26bda6b8ea8590b7e95e07f42e9dfb01467e89b0dbf765d6fda5e14. 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/FRX872308896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518b3e2f25cd10245b800c40049e6d400a14d33519efae5e72cdb6d56e6ab0be. 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/FRX872308897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd334891ce323da889f8c03182fb6d710030bc27f967e1b286e5def520b2e8fdf. 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/FRX872308898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534f97aa07262404181d394d3a80ea6769db4ec41d2f1bd04bbd204a0eff86a0. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRX872308894.