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 0xf255d6ddf1d11b2f6399657136a06c272961e01156e3da3eef5c1f936f766f83. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10ca4cf2-9cdb-4d62-ae0e-512e4affaf67.json and https://artists.proofprofile.net/proofs/artist/10ca4cf2-9cdb-4d62-ae0e-512e4affaf67.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 0x26c9db8bc9913cce5c5989b2bd6597f98b62b62f69e8fa49206beb9d1d5ba416. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAKA2513569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ff774c3fe559585e589cd27b0d4a2914b553d800d90346b9e7f1f811d93a8e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAKA2513580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a54f2a33c307803d5090b55155199411b05ce51e3d3d12ce191f3e6b3d30e3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT65W2540853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d356ff651a2c2353d055e0c680f24e999dbcde7007f5c830d9c3ae168cf30. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT65W2553039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bd5ce95e8c559cdd778eb1d4365ef453af60f4264901f9c5c39fcd5a349c46. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT65W2552999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93ad1198adbd7fa61ea08e1218f7da4a189ffd5fd0584bf19467c43575b03f. 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/QT65W2553021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdff8df8ed9f3e748719d08e3f6545cd56ec3a78dfec54a0a84aee8378c0f273. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT65W2564515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede8000737b205773059d2163cfdb297ec09a896ee75d3b3501675c15f76934c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT65X2530901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f14e3b912c8b3c81d6af1eab36158babf779bcdc36aec32757476a2dfb9a1c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT65X2530916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824f7e760908d1424294d0ae0d3b1b53de3f9812199b667261b80f7ab7ff53ba. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT65X2530877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce3dc9c2ab0a80ae5ddd37c98de7e62c3a7412db1c5ace1a1590e0bd818ae4. 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/QT65X2541540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af9abf25f9843fc104746320659977431b4544cfdb1c171c49082b394dd221d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65X2541563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c94a7693600126b55096c1ea8f8dc6c2039b9480ea608dc711fb1ca9c72029. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT65X2541549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3f0ed0c91ce8ed14b52d26a7438db5af64cadf33deb018eb142176f48b88b1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT65X2562305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54e6765ff2f0ab4dcaaf2f2d38381d4cd5f6c4b5691cce7ed329afad92b3a90. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT65X2582222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7fffa451f6d4a2da8bfb13782be5c6f70d93ccf206a03e24395c04fe02323. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT65X2582198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053b70afe6070d54c532f6b050c42227708c621b2041abaa24a1be2f1bdd6805. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT65Y2513862.