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 0x8fda96240bb7f4995815aed6482e2a06b0cbff133c9ca23a33adfc47e648b038. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c00c52dd-c935-4e91-85f0-096ecc805534.json and https://artists.proofprofile.net/proofs/artist/c00c52dd-c935-4e91-85f0-096ecc805534.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 0x4416c3f95e784aa2a8de7d69c245d708378b652cbfbac35a057705ac6b1c7eda. 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/QM42K2331466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5caf07da4e49d6c402e31279b9edffb6d7fd4c93bfa0b4abcc934ee17b20e. 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/GB2LD2310007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17ecb24c87f0c2ba78a04fef8940398bbf39a0ccf09d9f6ab877b886df11e9. 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/TCAFM2118360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c1a4d038f06cffdd19ce28471270d2a72eeafd6d144d05720f78b8db631a82. 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/TCAFE2038096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd618d368e52ac882e9ebaba0c70d435fbed41cc527bf88d6818ba03ed7977147. 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/TCAEW2081969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00c4fa288d63d9d95e693436bfff46aed1603068a278743baa489cd0cf4cf00. 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/TCAER2017882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b71e75666b381fe25a7b82b0d4daff343a8651bc7f1445281991a8ba5174a1. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:37:10Z), 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/TCAFL2139201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4160f99d34871b1413395cd59677436ed941fbd208cafa58664191e9334bc95. 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/TCAFL2139129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa329d7b8e36a13ca3d7e97d646346e99204b9f7d19b4041ffcea29104085f9b4. 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/TCAFL2139120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59425d511dd00c414b475451b82366e4743ca27ae808ee4d5f165a6c6fe5b5c8. 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/TCAFL2139123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cbcafdd013b76fcabe2373a4fbdacfcc34d4934cd68bda1ef40dfca2efc09d. 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/TCAFL2139124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896ad4feb5274b791fa719c9353d7ade3cd017b1901d01b133f1b285b4566001. 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/TCAFL2139131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb990363decb70379f75cc8920202be8e4133b868b7380f67b49a7b951de4f6a. 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/TCAFL2139171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea62f000217b55f01db5daa3097d5fb6e8f520464ff2296f235e037550202a39. 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/TCAFL2139180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981949df2e768f5a9555a2f29e972deab708644b5fe96b4ce13083cef4b1397c. 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/TCAFL2139164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ecd4145c6e3224767baebf489d902bca7df78a29849b3f82637d6b9922dd6. 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/TCAFL2139139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499318808e88fbd5e411a3e20d72398128aa837405defa9427ff867f9f9411b. 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/TCAFL2139176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55614110f6f7ff70a0f18c2915406cf313e50e4c5f52c897c80c03aeafdec18f. 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/TCAFL2139193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab0ea0270693052dbdcf56c6755a5de554560d42ceb3cd5379e4612dc3c5d86. 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/TCAFL2139169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8ee451b0de3872c36ee25bc340f3ca1ccf897a46ed85ff70b5ed7fd36804fa. 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/TCAFL2139184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026a56a714c196146aa6648cb10f3b9a039a39b0d307fe94ff697f213b651a4a. 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/TCAFL2139152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f25b5bd22775ccb007f89a8c038bfaf36e8636fa2938a06ff825ee389012cf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAFL2139147.
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