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 0x11704b30febe450ca32f7d0dda41be15b93d604638bd0001f414d64f075ee40a. 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/f09d5e54-2983-4bd3-ae8d-1367cb4eaa90.json and https://artists.proofprofile.net/proofs/artist/f09d5e54-2983-4bd3-ae8d-1367cb4eaa90.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 0xf92dcaf7cbec8b3f3d46a7930afd7388824b507ef30adc2cd167c2c0c1fa9977. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJW2493812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4297504e56d7b85496c6fb29533c9824157bad81cfe10024cda2ef4787a05b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:20Z), 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/QZNJW2493811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8559b694bec76a350149063744d38dac162bffd4a4355ee827df75e971a576a4. 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/QZNJW2493810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5fbf015413e9ad3f08eb6756557d99afbd07f8bf83cb9433fad85f5a8dd401. 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/BXS1J2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae5a58b94bf6271b11a8bab192c1d28b135c330b3f5cde5c7be348e71432ce6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTVM2450121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1ea765547af1b7e09c3475ab2a57ede20d5da3eb2a410970c0a53b4b5cb190. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTVM2450123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256874b2315e7c38cb48b1701a11c06c9e5e577f6bfb86ebf63623661fa89f86. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BXS1J2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ab21caf52b98882426288ca0114f905a27478aee5a343c175acb2e6960d1e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BK4DA2549142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03e4dd0370ebed443b653fa3aeef6fcf281068e8264e6b5a0216482ed9e33c8. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/BK4DA2549143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b069452655c64cf60e59b05947f1e545cc57878237dfe9f75f017326756a19. 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/BK4DA2549151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59db88b25e431acbb75e6ae6ba9bd164f703f2a8e3b9e3c0e10e44ffd04733e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:08Z), 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/BK4DA2549145.