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 0x26f58cbb6433f2c2e3481d105665649238f3197c72205811f10327d7ea4a8921. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be977788-6aed-43eb-9363-b446d908f51f.json and https://artists.proofprofile.net/proofs/artist/be977788-6aed-43eb-9363-b446d908f51f.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 0x26381186753d59df45164ff7bef80c882ee391a363c1e24eae97a3f05dc2f420. 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/QMFMF2215347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246fd93a2fb1230a02bc7327a9db299239bc7671cc2df88d0be8aa4338dfc98f. 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/QMBZ92456157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9084bac2d1788b645a6662032edd37720899ea5d306777ad1ee8e21ec6e9c0. 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/QMBZ92456158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3477da29df468c3a153dadd86c34be62995c5f4760260ace664776bf1546d29b. 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/QMBZ92456162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e01570d9b4a6380bbb1224883553fb2172630eaa5d0b0d8b790c91d074e4bb. 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/QM6N22290859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd229fa9084601f438779ef8de20133106f5035d5544df963428d5326ae808bb0. 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/QM6N22290860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5695eb66a15fc85bf3c8bcd757e16a6c90c6483d36f0cbc9e48658a1d98ae18e. 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/QM6N22290865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26381186753d59df45164ff7bef80c882ee391a363c1e24eae97a3f05dc2f420. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMFMF2215347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25c29eb0b7153c16f1154523128169f97b3368af7c45a8eb8b09862fe0255ec. 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/QM6N22290836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40a8a09f27ae2fd5a19c35bb46c69f674d50d3e3029b1b51c1382117a5ff57d. 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/TCAFY2148949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516692540f9fe6b50da564e1d895e1381ee52637584160f85b7dd5a1e07ef7db. 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/QM6N22290837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae9714fe96971342e11abc86acc3972b3fc67d4f8238f8ccfc7dc1a0006d83. 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/TCAFX2143711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246fd93a2fb1230a02bc7327a9db299239bc7671cc2df88d0be8aa4338dfc98f. 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/QMBZ92456157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd229fa9084601f438779ef8de20133106f5035d5544df963428d5326ae808bb0. 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/QM6N22290860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40a8a09f27ae2fd5a19c35bb46c69f674d50d3e3029b1b51c1382117a5ff57d. 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/TCAFY2148949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae9714fe96971342e11abc86acc3972b3fc67d4f8238f8ccfc7dc1a0006d83. 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/TCAFX2143711.