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 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 0xf004e0fdd297fbfb2e9dfbc9d4a86200928b7cc4786c97cf1e2f098a41f5e50e. 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/88511abe-cd2d-4ac9-8b98-9d9471de0a4a.json and https://artists.proofprofile.net/proofs/artist/88511abe-cd2d-4ac9-8b98-9d9471de0a4a.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 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 0xda978df9b6f5eca20337e719baeee51fc0c3ea61ce636be2c437adf1eae52688. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZHN32502342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0313a9cca8d97337e2ac8d924321c99652325dde37605cf8a87b2a1098d119. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHN32502343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2405f70b5a8c5912d2472206d1f5e0c6c3f50b0bc489894958efc128d70daac. 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/QZHN32502344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75341b630f31f77df02fb2ad634a3995f201145e47c5d4805a9397fbeed49cf2. 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/QZHN32502345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cc67ac2573b8fbac82d7a90e30e9b2c307ebcf4ff0cc28c5e5a7c1e15a9f0d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZHN32502346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56e526bf9d7f270a93377e7d5df711648befec202d0e777dd698cf68afff115. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHN32573318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eb2a0f986f4d5bc77a79013c5c531dc21621a1d84e8545221de05659eccf57. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZHN32573320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d457ecba2de5f589d65303df84de46748bef1ffd75e892aace20da60208c574. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZHN32573321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd294ff6b256735d266d3698537691b7feb681982c80917d591b3adc0de24e284. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN32573322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6b885230228aa19ec0c2d2a140e16ef0429cb20e151a9efa6b01b73d898b41. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHN32573323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dbc34372ed7ef0848123d116f6237a90c2ed502b0fb7fdb1d52252c62e424e. 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/QZHN42587347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22232d1dba8ca0f2e7de98bc2f7c45d6578f3a033261e86eb2d7c00b486e671b. 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/QZHN42587348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e68659d33b083348254d178bc830746f60ae224a6c2a124d0dbc71965869e8. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZHN42587349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e939458627ac1a41f726e40ff7b8c05c635436b31ad3a5042b3d9f054457d2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHN42587350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea2a166f6bfc98176d92469637f8f05dae01624590b71a702d7c35b84d8f64d. 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/QZHN42587351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a3fc2a66a095617420b6551dc061564b6fc1e92d30331f42b2f5267dd09fdf. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN42555608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae437e5067ab97c468a0a1cca04a50a6fb3009028d69ec0960ab1cdabf3cef6d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZHN42555609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3822754b58547783a84811b1d208ccaa007651436563de757002a3ea1a1f050. 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/QZHN42555610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980bea4cd0b1959f77c518b78cb3b5ea2d43d3d85e44f16fb9cb902344472663. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZHN42555611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99688dd5d5da69c483e845ca9a80fa4feaf7f5591fd2fd312d0eca8dab2a1cf3. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZHN42555612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0faf80e921b1284f8ec2b456bf01a83a5d934259239af05857630be92ac44a5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN42555613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eecc536d34b0f02efbeaea414164a021c84c05528da4f960f9c4079abe01090. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN42555614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d66d4fb73346f3a49f71d5d24ca9e143ecaecb8c2656a1eda2a711bbb37a9c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZHN42555615.