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 0x0af77a89a57e7c4ae90f3e6de5eaac861d0f730d75059b745599f69121f1eabc. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5009bb19-fd8a-4d51-ac6e-8ce4793455d3.json and https://artists.proofprofile.net/proofs/artist/5009bb19-fd8a-4d51-ac6e-8ce4793455d3.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 0x11d1ee441b33facd99d0d9cc2d2628b49294b6318271a2e57a4715e9a222338d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMZ92429917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04a225eed719b439660d225c1273aaab180ed2af42f4b749d1f72d7e0546a9. 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/QZMZ92402737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7358c7fadcfc9e996d968401c0ca223d8dd90edf41797f1768f7f744e726357. 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/GX8KD2492431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435763d7b66eec10ef34610223c9986170d3a1321142bb33b31758be4fd6b398. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:20:55Z), 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/GX5MX2384328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dc9d91277af99d801dbf2b77d6abe3b3f82fe5d8ecc4878fd1e36e9158e453. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:46:50Z), 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/GX4R52364837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced2afd74fe6b9d366b84ff34c59032bf559ba3ec1eeff2f8afa33189d1e9d4d. 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/GX4R52314392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2e4c6718751a40c2f5281fab8d698b05e1bbb11059b33774732657906f2bf1. 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/GX4R52314812.