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 0x213b681671746165e4e05a7a46063e6e8f786eb834490a1f202a2f24ebc4c726. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb1b8883-35f8-48f7-bda7-f365e8578c20.json and https://artists.proofprofile.net/proofs/artist/fb1b8883-35f8-48f7-bda7-f365e8578c20.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 0x0a30cd93b14b0d75c3584c8fc4c9da298cd0c95daa22414b7d3cecf8bea6c93b. 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/FR2X42215246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1352d2423992bf3553cc91c467c843f29c65b047489296c72a3d228b6d8b07. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:28Z), 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/FR2X42215247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f973b92226d18095f472cf7a6e92ccdc8fc4140c15ac9bc0aad408b8f049a3b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:49Z), 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/FR2X42215248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23c312e47dca6f8bdef160416c8c72fb431a4053e012fe265c5abf26105bce9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR2X42215250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ae172725d47cd62b9d22605a5eeb87775ada89c022c16b9c8274a01dfd5102. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:53Z), 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/FR2X42215251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8494929dcc6058eb0da53088f8cc20ad65c3a1dc22eab43ea317b322ac941e71. 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/FR2X42215252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912a5a547cc2c572ea2f6d1a4439b71bbcaaa55898d977a49baf531e4f668c4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:27Z), 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/FR2X42215253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b81d03d6f817474726fe9ace18228f8b18050565d0e527506f09f346f8532. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR2X42215255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d60e2ba2fea7daefb4b4560be3a4b325f31a69d0a03fa1fdca9aae82ad195. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:43Z), 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/FR2X42215256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803efaef40f6428409296d726531506e367acec807226b19f9f7175b8790c05. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:31Z), 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/FR2X42215257.