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 0x52a1a07c8c11972dbed2c3eed04667324c8b1a844c7a08fb9af10ae4faba0bfd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc840186-fdde-415c-b6c1-5dce3d3711ee.json and https://artists.proofprofile.net/proofs/artist/dc840186-fdde-415c-b6c1-5dce3d3711ee.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 0x33895c263d5a3809ca59bfce838d2fba05d75a1cd9724c5fa4fa8b825335372f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRQGF2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596408e420d61b61ed3ed4fe58d3ae08a9885f4f938873cfbfbd875349b6389. 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/BKNDN2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4908b318a6f5dd9e462e8da40ad46b0de70c8728c08e79b7f65941a2b8dec4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRQGF2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d302cbcea615a1b099bd6f5f838325e207292aa8001b77f754af9585d66b4d. 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/BRQGF2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0731801ab73746b3e6a5ca9dc40775404886bbe7fafed8b1aa97df5860e0c7e8. 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/BXP9D2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a21876d2f67b958332ae607e866802b507ea6bf72c9b39e226290db0fba44ef. 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/BXKG22400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f932f321569718fc19629cd842d3ef36122796801c35528b7a7a300a13752f. 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/BXENO2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c2b44236c100c441fdf546f1fd8dab7dd25fd33cca38aeb91b07d57389287d. 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/BC6M22407413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dbe9df700b607f2d01ee0cb7ce56792a86cce39bc390402acd91be273fd272. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXBOW2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e43fb9ed4e3d2959632c9b81b1719ddc729ac0636dca0bb59c329e589ff0f62. 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/BCFSC2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3079646bde6319f4b0731c32e2b076886c30981c21e6fdc05a28a69d9a139653. 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/BXIV82204201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622cab9686497f80d9711ea681ecc10a59ba3505bd9dca6ea54734714c7ee00a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRQGF2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaad1f34890ad3dcf10dac82c780a764e1cb902015467b499a3f19b03202d18. 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/BKNDN2400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf189b39070339dc1fc3c2edf37ba6e98a30e6212e6c2e0bd02bf08d3e1337b. 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/BKNDN2400207.