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 0x8962345f9f780bc3e8a76189c96a304e3979e56de09466523529624d22f36daf. 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/16fe8455-e5fd-42d8-9638-195c4f63c362.json and https://artists.proofprofile.net/proofs/artist/16fe8455-e5fd-42d8-9638-195c4f63c362.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 0x26fcd0c272670706eb75f4d30bef69f68829c75bf3a1f495c21aff8b9d49760d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8KD2423491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af6e7c80cf624c7b16dd01706d7965a285596ce85a9ed752bfa71d22bce7cd1. 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/GX3HH2390214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1884edc08690a2c32cf9eff39dfcdab45a96f46ff52ce592c8ab56c28f9c18. 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/GX89G2307318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd5a3fa5319965c0a06b01b6e6133caea81fd6d16c6ae14023fdd2595ff8ee4. 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/GX8LE2293509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13258443a53602a096c99ab08cf1280e196e5d32d6bb1fcf2bc31373b74a7878. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LD2254239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997f5748ad0c82f1dbf27ac7988cfc7d92b4f7ae69d0cd3945f71eef4b8d2dd8. 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/GX3HH2206762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c7bd846aed9a96019e1ae92c98452e1bd52445221e364660cf7dd08670fcc5. 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/USA2P2145163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ab67fb27a11f775facdc7ed7065bd2a8192f79903f0f008e9299f003d243a7. 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/QZS632107856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69097120863a7b6a0459b5f51338c715a2c97cfb7c4aaccb9173bdf27ba027d2. 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/GX3HH2148497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb9221e4a9aa22ca40c0b1e5c46c35c8c693800c5f631628fd37d91ba9fc2c. 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/QZKDK2150840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e12680fcb6e845553eaafa1cc62d50758d216dddf444ca7bc31413ee96accf. 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/QM42K2102819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5bcce794412e5e69589ae82d2d51bbc932e315ec32ac01fa00cd819ca0bf8. 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/QZMHM2093542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524be2d6f9fe2e702f386ddbba101bb3978416fb9c8a213475423bbd2f452d86. 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/TCAEU2044796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2adc7a62de6f148e49ae1c71944af2e72b84e1ea875e358eefa757f84ba622. 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/GBSMU7639229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535b32ba248b858c066b151cf6f7509058a6f2b3ba7f91e225b8ba684840a157. 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/USA2P2013194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e8ff888bc05492a9bfa9669560c74713573a4cb60154832e093204ad806acb. 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/CA5KR1958330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd68b7176bdec8cbce8d7fcfde12425ef56479f0f9282b8d6afeaa8244447f0. 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/CA5KR1923671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84fd1f7bf721f8bac16faeb0461463f0386df77bb0aa10f8ed187562f7da163. 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/CA5KR1913499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439bbe09081f9722bb1406035d31ccd405c9a97e2fef8fa5ddda9955fead5d1d. 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/CA5KR1902425.