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 0xf6c43fc8c10bbaf0c6a56f6a7661349e3b366fa3359584fd1af84a258ad5f467. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04e5e193-1c4a-4c1b-945f-f832d575bc40.json and https://artists.proofprofile.net/proofs/artist/04e5e193-1c4a-4c1b-945f-f832d575bc40.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 0xd3147388b8e82f0d6967d886385e6ac827c972d647a1e835085decc0610faf69. 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/QZNJV2474352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1713fe9cfae9f74c442c887739dbf8590b93a0ee376aa1c5396365aec7900217. 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/QZW9L2309462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943809739d5dcd1f584013f411f682a16bf136b882aed255c3f8303057d42f54. 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/QZK6Q1958884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709925f3f427a9d0be9e74bb08c96e9e83b96cb9c14af9ad2f41fa1ea09fe4c7. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZK6Q1958885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda8e037ad8db1988164670b1577ff47f5d474aa1156623daf193f68a3161790. 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/QZK6Q1958886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5dec681cbb972dcd7e3939e4bd608b120b97512ead940192193ee0d7fdf0f8. 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/QZK6Q1958887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc7ea12c5ccd3f95b38d1dac8dc0e495d8ae4eba6a4628eacfc332a95f2e15. 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/QZK6Q1958888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade8be0f320ce378ff162509d66ceec2df5422b78cc6c170f4e17e8446190f4. 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/QZK6Q1958890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe245d49fb3aab349795448699eca3e209336017254faf6a2a7b4957f04d0b1f2. 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/QZK6Q1958891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e7a19a6163f0942ab8339e58f68e2fb0ae21760d7250de801bbd9ce475d1ef. 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/QZNJV2402907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9825e3a7b8f91c1db2f55f1ed2038693d80bcfe42eb5384a37569c2c5b09cd39. 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/QZGLM2475172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bda8fe18231a827f0d49569243e113a66cb7ee19d7abbb1850508e188c78f5. 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/QZW9M2332040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb561398067400669d6fdc1ba6c9215f84c0a3362804ec4f2bd375917006f5f28. 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/QZNJV2332563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dde618c67219952af478ce8e1ffab65343d562eb1b04f275c36e58e6575a4b7. 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/QZHZ41971574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208fef710cef1577dce2c8863bc7283c70efff04bd38c42af8362b717a0af233. 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/QZ5AB2333614.