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 0x3c0404fc9348cf64bca59268cc28fa744a9bd5e341085433ab8bb622b7712602. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e4f8387-55e7-47c0-9087-d9317c05b553.json and https://artists.proofprofile.net/proofs/artist/9e4f8387-55e7-47c0-9087-d9317c05b553.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 0xd7924dc341b8e39585429ccc88f84f8bbce1accb259bb9c8be221b9399415a75. 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/USUM72005132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a6794937f7d2d2a6dabe53a36c8c16d8896d1315939ff4a1f990a6d4bf6a47. 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/USUM72015998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29620a7ffcb2de8543f57558ea6e7c999fd89db8bce045ab0b483aaa2e0cec53. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USUM72015999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe9f4c125bafdcb2f0667c23ecb85f1fd957bc451cf2d5faad85896e6c95fca. 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/USUM71902169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e87c4bba1acf637b95b0635ca2e4e2ce2beecdfa1d7c296373b9bb35e9563. 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/USUM72016574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225d3387eaa8fa6428fa5978019befe2588d9a18c3431414737df6763ee82eaa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6H2431379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1aafaa37a844cccd0f71994995d0774ee0bac84d6b6006ba6276f84e9cdf9. 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/QZTAW2237034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e4560540636cebc8c2caadde4836c5df453797bc8aa68b644597ac093cb7b5. 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/QZNWQ2234246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a6794937f7d2d2a6dabe53a36c8c16d8896d1315939ff4a1f990a6d4bf6a47. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USUM72015998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0088983194553fcecd0b83118f2052b2048c5dc3758f56673d7233b4e0f10edf. 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/USUM72005261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a597547e39e75508ac1166a64e49dbfe7743961aafb8d516f3896108718ee. 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/QMBZ92461176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea8da88ad10b23fae90ec19193f1666b4269a3b4f987fd7545c195d53b6bde0. 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/USUM71902155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18729aef3e9977e321ae7202dcc5232597d4d8b03420101eb6d5457269bdce16. 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/USUM71820003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9c357fa059ade4ddec3b65bc28d35d46664a33d5b4843fe777c2b5ee87ab2. 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/USUM71903073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a117745658a857e9940a6866b4a53bcef54c70b3ac5ac4757cbf9d4a62955c. 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/USUM71901710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe9f4c125bafdcb2f0667c23ecb85f1fd957bc451cf2d5faad85896e6c95fca. 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/USUM71902169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0047eb1d63e3970e2bb0d9465c152a4490ae3d282a00f9e3a0b6d050cf934e. 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/USUM71901503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700fd13fbd95b95ba2d1793f0b1cf023c72d6be32cf69aa7b50d72fffc7705a5. 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/USUM71902183.