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 0xc44053d392ce8589212f996a792d2c61ce3c33a9851115f5228aebaeedfc84dd. 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/ec39ff0a-76df-471b-854e-2ea432a44e59.json and https://artists.proofprofile.net/proofs/artist/ec39ff0a-76df-471b-854e-2ea432a44e59.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 0x2d52d9fb8234df37755225df82a9ad889b8c110081fed4382aa04c52b046510b. 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/ESA092403638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1453001d6a82f7b2415c06cfafcdc34750e1aae7c3b30493370b75989bec283b. 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/ES6081142601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc9db0fb74e60cbc2aefd936236e5284d7b7ae5bb7189b0756247c0a457a90. 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/ES6081142602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aad0b8d97494fe7f6b330b4308603fb9bd545059fdb11c2fb857439f36cb3e. 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/ES6081142603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61357fe1eb896768b1f8d42372c8225dcc1c44bb1c84019c9f2126855ffa181. 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/ES6081142604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe861229b1709a264c42b449d6c6900c0a633e6dbee139ca691e99bf7f0c0d67. 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/ES6081142605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ee3a5439af3c2f445429c76de7494613b9039939eeffd128e8a7b75254a24. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:55:18Z), 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/ES6081142607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc0b7965f7af4e95b61abc12c841c56acf80c344c08d6c43252694c7057aae. 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/ES6081142609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca616d77826467ca4a54981e237a12f44add48fa2713c227a16b268e493be2b8. 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/ES6081142611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ab249ba59ccc526813fb053bec42db891e2055c36b272cf5a501da8355d9ae. 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/ES6081142612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf092353042957933e238b25cf65d8ffe60332b8715032fe47935b83b4889e4. 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/ES6081142615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714b97ce09eb1d531083da39b0c17d52c8359984a5bd708be24659d05a83096e. 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/QZZ972318985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a2dd71a5be71e2d9ae38b1c273d633f9a0f21c455bcc202ebeaa9d89c2b7f7. 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/USCGH1404505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d377cae05718c1c8c0306e60eb32872ea60ea247da4b1b5549ea96fc7aac3ad. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNJW2061474.
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 0x64b03b4b752858c6ffcb2402e72f954cd287f7cd0165955e9e4eeae661911502. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ES6081142606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3402f02af59a1dca09a51e3f7fb2496bd1adb3c005e3c50abb46aa1572b0381. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES6081142608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb8b3b31846eef17039ddc44b7d8b4d11bd4d6c311225b9adb525e54eff30b. 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/ES6081142610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b210d20f84e87eeeca050c928ea4d4c8fafed4eea29622210bbf76c4b77ae1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES6081142613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626cf9893a16aa58105cba2978ef91b4311b7d1b76e91b3bb956c1dd6c54b7b3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES6081142614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac580b4587351b8fde502fa6dd17ece8de2890fbde31a98a108f18321bbc1ca. 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/ES6081142616.