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 0x65d5d41019e948e3adc551634ca56a3e111609ef368c90708c5dce0e886c445b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae7badb6-4992-402f-a169-f6a26cbba295.json and https://artists.proofprofile.net/proofs/artist/ae7badb6-4992-402f-a169-f6a26cbba295.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 0x2410eb836c1d7a21f4244eac7e10b8ea2412c59aee0d1a7260486d7eff5a9971. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM82262721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b64594719698bdd179b4008091aa0c077f7d251cfd2936a61cec9b8dd838e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM82262722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d2b60dbe9babb2c895088163c7f291b64f75cdd0f9dd32def30f5e97159398. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:30Z), 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/USHM82262723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34c9d87a6ece900cf177daaed952cf8e276c378dbfe9519f940603a0ed9c3b3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM82262724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609f430bacd1eb85982db808c5f86151d5768b383cc3afb9c172192f80740ee8. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:01Z), 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/USHM22492115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f88c57f54393bd9e2ec7ce273ba0c0e2c889af81811f40ef7d3ab4a6ef919e. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USHM22492116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7256c44a8da34563c110f5555c62655f41991b1aba1ef3455c9b71cce5c1e8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM22492117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2f12bd2c4654e627c7f0c8d4a7cffaf7f538067f0110799ae5ada0d3bc790. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USHM22492118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46fe2a0e2c7a1f07e98cf600648aa20b89f794eae9518161b2499209f46d01f. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:37Z), 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/USHM22492119.