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 0xc4eb31b6fdcf3727c2a97dd6383d9af5428c905d89ad354bb617b7cfebb4f378. 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/467294d8-8d0c-4644-a132-d8575ad5e136.json and https://artists.proofprofile.net/proofs/artist/467294d8-8d0c-4644-a132-d8575ad5e136.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 0x3ffbc799536e99497f4b539c4ae982bc40f2807d5411ffe9f4d9bc92d682437d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXESV2471139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7300c9720d5e5c942234d41e055b1ca08e9546d0607ec850d529c5f681a4e0b4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:41Z), 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/MXA3V2413536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e744e7f1cdb5331c09187172a78b43e7bc049fdd49335b208d68261a1ad819. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GB8KE2428357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7b493dffe84e20bbb217602cfcc43596984e57ac31d8065a06fab9f453d2b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:15Z), 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/DGA0T2465798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22172ec412b15241a67bd468a5c8cddc02b2fb818a7ee88e8586572120b0c4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:56:46Z), 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/DGA0T2465801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fdc4500e39b821c54af540055bb5f70903f781b594cb53d9f94ba60e055fac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2501970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f06312325ae3942cc660f49dafcd141563f2d3ae718972fb4aa8b6ea4f2b85. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GB8KE2501972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb9809c382a49dddeaa6611a92a5f26f17f57ed42403265bcb114f6d210276. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/US3DF2544649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33853ad16fa177b32018b1ce6cb7b0d45b367215c943df4bbf5680fcf186612. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/VNA122500469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28e8262bb0ee587bc4aebdbfb6606392596ac8b24386b0b9209efe5b2eed113. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/VNA122500529.