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 0xca6ad9a0c9839b45084154c0fb2bbf5ba3e34d5887241bd203ea1637a166fae8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6652f322-6c97-46ad-a33f-9b34597a6fb1.json and https://artists.proofprofile.net/proofs/artist/6652f322-6c97-46ad-a33f-9b34597a6fb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piotta Presents Go Mixtape (Street Art Files)
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 0xc23c3c9f93ae8b35b9a0276a383863cef35c3f30019f52626526ecfb0941191d. 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/ITJ790600763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0a994d7e34667a88e07626653340fd0b07c56cede8715b15943d43263aed1c. 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/QZK6J2568019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb555c8e890a6674383aeffbd40bef342ab6a0033b00e6af364076859ac8794b0. 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/QZDA42351414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439881040215ee8d3dc0dc4a42eee7792875d5784fce45d1980e4c4ae44e91ce. 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/CH6542313684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89a7c2ad85b7811ab40b5dfd8cc74d7cb57397a0108a8679d2ac61e28c7fdd6. 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/CH6542313686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e012443c5a7e5e1cb311872894d782752d329fd1b3faef642e4ede5d98aae60. 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/CH6542313691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070d8f19bda0c6c25934d9e2110ae0c1daa71e41136de4a442add8675ca001a7. 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/CH6542313699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2677b7e9b9abc0e5eb00378abf733f098f144dd8af98e4c36b67c2f44f28e70. 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/QZK6F2144832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42638efbb12ca7592b569ea46a35c4b7d9a68be0950783fd18dea48fda0e5de0. 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/QZK6F2144834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea8b6c81605d58048ff7cc26915233b76849def85f2b0b8004a8bc26b1b92e8. 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/DEAR41998061.
Piotta Presents Go Mixtape (Street Art Files) Vol.2