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 0xe38abc763e07d3fa08ebb7a93098179dc3cff197c260dd85fff10aae67195c90. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4302c02-0f99-45ca-8167-b0b638edbd7b.json and https://artists.proofprofile.net/proofs/artist/a4302c02-0f99-45ca-8167-b0b638edbd7b.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 0x9cb20e007833fee201e1dea035211aa64c054d0ac51d7e7457fd119bc4267ab5. 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/GBKQU2362838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4471469ff1365def1603f481ec46cebc5d6d607931424aba4ca921155ee8657. 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/GBKQU2362840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fa4ce12c7008c2d9365407c546bd36a0d4175d4eaa63ac327e70d6a815aebc. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBKQU2362842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ee5fe6827f4f8dddc5aee8b505b9989f02d4c1eaacead4aa0d335f8dc2f1d3. 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/GBKQU2362843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4c54717e9b1200901ee30d95d2efa498d03632076feb2c5b0d709a75e4a3e3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2362844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf881bf6c3509c4d6b051bd33fc4b2df75b9af68f1e1747e145ec2e07c37d851b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEH742409513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d786345f2b8b90cab931d23824d6cca479caba7917f66c6c33e95d857eb3b3d. 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/US9GM2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4c54717e9b1200901ee30d95d2efa498d03632076feb2c5b0d709a75e4a3e3. 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/GBKQU2362844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b263729b24f1eaee43f7d28b2226e072a0640bc310bd445789107d4b7c165f. 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/UKR6V2410537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7842329712c0b40d868cf265c447a03ba3bd441f82a96633b88f901ee480880. 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/USCEI1224701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9153452ce210ad21a6cfd0c09a747ce8a5dc8afa012f483e07b4936f7f270c. 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/USCEI1224704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64c42a8767323686436bf49de6528c1916f7ba63fea4473037ddb4844458d37. 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/GBKQU2506287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9027b7f25b4e1d91eb09c98aef80a9f43c6eea1eb096db74d0540ff2379b9e2. 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/DEH742441016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3b86abcd313c6219f20b6aa37eb49fcb8d16774957db954118547febe4330c. 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/DEH742441018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da864520af6be0eba3f5e5f83b5479a1ed4a1b7fa430ae1d86351505cf5ec28. 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/DEH742441019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920eff76d8089e20071745341e4b2d3112a14387c2d7d11f6a4b26fcf927ee5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEH742441020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb238d5589ce3fd53bc61e452a514fe49f762746c0bb90ad1ca8261650d203f72. 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/DEH742441021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52a484da5f4547089730ea737aba54f76c0b5c632cb0117e7c192c545d51338. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEH742441023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb8c53f538764108ab0bb5d519f0f5e5e74aef59f8cfe5d8ad7f61e5126b385. 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/DEH742441028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f20c4b10359bb7b546c2bb15568d3ada1d482b6a57d1c4e7c81ad7653a51038. 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/DEH742501715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36785c7ca5510feac3b55dd2f0b996a3a185f3df2f20d1b27bff075e17b99802. 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/DEH742501720.