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 0x064f7b75a284d1d146d4259f497b89acde621d3a61595d41a2e6143e1c5dc1d1. 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/fb9d06f8-4ce5-46b9-bfce-6f4184122bd7.json and https://artists.proofprofile.net/proofs/artist/fb9d06f8-4ce5-46b9-bfce-6f4184122bd7.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 0xa6c524760caad9deaaea63252a787c989d583c39e418705d213ca77c11de34ca. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:07:17Z), 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/TCAEF1948666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b5cf9960853b6543dc0d685bcbc93e7992423e841bb46dbe082150d1967c85. 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/TCAEL1986176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d02730861996fd3cf839a95548e778b1b4077a7212c2ecb1de58e306f84a7e3. 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/TCAES2045570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aced7fc9856626e0ebfe8bb0d8a0de63b4864d286cefac32bae0f7cd689d849. 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/TCAES2045551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b892e07b8c6a7103c42a26a4767547cd4bc0a19917be3658292391417504e5. 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/TCAES2049162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84be92607d0ae6aee295e5470683902e4b5af8f4060706d26857a27c0f846c7. 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/TCAES2049618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd527db89a297a9544265edb000551c3bcd93b946e44684c9db5c908917745b6. 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/TCAES2049754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800f255de4dd7a0c67edc4f252560359c7b67be538bdcd63cb36798a65ddf7a6. 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/TCAES2049794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb18a619d1c939cb8dc0ec75703bbe3e895b84a4e5ad0e28108a33e564f812. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCAES2049511.
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 0xe8457d11361a086ac82377a7b003ab8a3aadb98ddafc3a47631b3eca61221803. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAES2049596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab519a7dd4a2c31004a987ceae7678249f2b6fb322be4dd3f715685888bd272d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAES2049740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87091f40100e1c5f38053c2a78f49b796c13f9cf8000e68575a1e2ed9145d27e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHD2399758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d04e8944e5ee2d57b74dda569353be1fba5d773ef3e33608c9d471fd7733e3. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:35:35Z), 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/TCAIW2405665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe565d039f4c0637edf46e0976540f1790f940472c41f974b0d34e598dbf69072. 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/TCACE1503188.