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 0x44a69b998312269269334f59564db5818a1def918ec446fb2e8d9f1013f2a8a3. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/866e4857-535b-480a-a15d-b5063f249737.json and https://artists.proofprofile.net/proofs/artist/866e4857-535b-480a-a15d-b5063f249737.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 0x4b89852752c4d7fee2e786f39226e0b7366ba1abef144775718d312cd1a3a315. 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/QZFYZ2329510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2de2872848a36458d78f95a175dd9c2750e43d7e664ab752ad0f28e327923a8. 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/QZDA72410546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa122d8c2ff0044b1ba6e9e98a7aac54f9a22a65b7adbfd7deb78971621d91a5a. 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/QZDA72410548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2582cd4adfd7ac0bfaa964f2a1468d6b398b2720955a356ed09c04f65bcaa37. 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/QZDA72410554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520567e818b1b0880ec384ea9df49cb7eb44b9ed355d3b9fd17cc47149932b4b. 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/QZNWQ2292261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2511aa0fb6ff8ac930a9d743f2bd1b6a7c140fcd750f1de9d954f5e8a6a68048. 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/QZWFF2499783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40905b7548a0e8db8c3b9eab51d4555a9d4e1422dbad2826d4f3bbf69dcd2680. 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/QZTBF2427291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40905b7548a0e8db8c3b9eab51d4555a9d4e1422dbad2826d4f3bbf69dcd2680. 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/QZTBF2427291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c461e5d293d164f0126e13269c8e69b44eee8be8dc6eb7edc3c6fadf17cf3c2. 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/QZWFR2303149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1ec6b17597d857385bbc0ede2e20b274209bb42f1d602010de6708dfeb6910. 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/QZTB52360611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dde99d520e46aec07a6c62df424fe5b5a36efb085b4d843bd1342ce1e09846. 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/QZTB52360612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4784d1dec6042cb0a57f3f01866e0693b8681ca5e84b98765adcbd65a9efecc7. 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/QZNWT2341013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2d7ade4e024cc4b84cd4f46ddfe103f98735f98538398dfd956ef53416a14d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWT2341014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978d54088614933174f5be09ab88141db6ff78831493178c4c3ed9de9cfde228. 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/QZK6N2329793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1756056210d8d5a29267da4bbe21ae4c3ca5fc4190fc553168730b38447bb3c. 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/QZK6N2329792.