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 0x62ef2ce5f3205be110b28ef8b3fbbea619bf61746d7149ead1ae8d60bbfe30fe. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66bfc4b6-1aef-4f37-9221-e587cf9183c3.json and https://artists.proofprofile.net/proofs/artist/66bfc4b6-1aef-4f37-9221-e587cf9183c3.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 0x899698086fd86e3e3c3940023e10ba3691c267adb43955458917a66b52a7c19d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA062479138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990a4d4684eaf3bd7d1355351f556be21a8a83dc2077f4fd164b60702693dec3. 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/FRX762490532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96af4f1f7ffa890c838c67941eb6eb0a3698c851793e9135402ade2cf2b8113. 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/FR10S2446661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ebb0cd7edac9538f03cb8a68372bd34f11b5fe72f7fd415d336bbd53f07119. 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/QM4TX2025503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf124069e271cc702c80597b182e3a69f7e17ce4b311aa96555ea8feed171e6c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA052316238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dd2a839cb5f18973cfaadae34a077a23f347d96f29c923021236e14bb8d091. 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/FRX762356884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188ddf7291a775f14b9bab5e51b34ef224a94fc1b8484cb4e9befcfea38333e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762332593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3700ad36105ea77f9f0a5e1fbde085e497b53ef3f4fa8b8964555e0bc59aa5. 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/FRX282358660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94a9eeea9b333e5b155c8f60e6da78aab2b927922a1c91118367edf7575af02. 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/HKG731761986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a6afc797bfb47d902e068fb2e84363cf27862222e5fc376215ecf7cc4d7747. 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/HKG731508100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7224d43c03e3a50a3684abe540b874df8ee09e1079ae2ac187d555ab5d8056b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWDL72103517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6f0affb8a310241284b28bfc968d70be4c547504de4bb4cb081aca62ccf2b8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732112505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e63d19b02628a82674cf010b5f45d8b0905de3d3eb3ffa3a1447e9f38197f. 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/DGA0R2417280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c24900c143ffefa01f8cf34c6ae192473fa9890678d911a46607e48057d1c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKD012358017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391598060323b37d339d0e899b703d3a1365bc916b0d45df3b1f1ce94eb2d9fc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKD012424161.