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 0x9feb8e078d63540b7f05a93236962de6d4f14ef45e5266ef3fc0b9f2fe3eafcf. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20bb37f0-793f-4abd-a474-7c12f9a57ebb.json and https://artists.proofprofile.net/proofs/artist/20bb37f0-793f-4abd-a474-7c12f9a57ebb.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 0x0f26653ce79369c6adc9303366174afadef3319f3c8f03166e5fc8435d8fd99b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZKDK2164344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84747a87acd49c46d42caaa03cc06964264adfa9e40c55c8d6cab1197e219526. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZKDK2125853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e548b97a99afdd8dce2b2e520fd0b4ca37bd3d768bac8bf21e358fdab16729. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM42K2103701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48052c58cf137f23931d00eff855cf9c9f643838a1e81db8b151767b2ffbdb5d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:27Z), 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/QM42K2178889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2866b4997d96316aa7e08f9460eaf3c65452f5f4a7753f4caf80ac67076d724b. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZKDK2195192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9140a0ca87ae102a9cd1cb2a54ea843eb8e29beb86ff1464878c42d4d596b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM42K2155807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f0390d210fa00bc3062ff75593bdbd851910275976b03dd5bd2a786f65bb0b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM42K2103444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181c163af7af6011f405ae1a57dfc2e67ea1bf3985bc8b5ca25efb503a2e848. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QM42K2111091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04804c9e6e3d068db2080092faa5004412600893a621378df38a122a620a354b. 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/QZKDK2173448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfb98be20275132540e756e957c00d006e4ef2bd0e234c00e519423f21e9708. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:37Z), 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/ZA15G2400018.