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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e3fd575974e2bd83f975cea54b5eb4e73046a2b2060fa07a4fe8fbd080acad. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eeff2eae-6f03-4502-9720-89264118546f.json and https://artists.proofprofile.net/proofs/artist/eeff2eae-6f03-4502-9720-89264118546f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d975d8e390dcca495f3c2c49430f6fad6ff5198e553fc51642812ffa805bac6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWY2279120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b6365eccd30b53c9c024b144787c3ad897a37e2fa008cb3cb53b83286a55e6. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZPLR2297447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330775885e99bafb65e3781f2bb7bee1c4bff55edbc2f9f42d8fc7e83edb70c6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZFZ32390533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bd9fb611c529a4a8ecfd8e2797b20d664fe5f64c62ed673c07a6dd11454902. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZFZ42309031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf122ee0fba40caf465e470ab945a197d7c2c1def6d46492653d6ec43967488. 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/QZFZ42311858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385c7395aba3324a235b84ce5f37b50af5c53f2a5cd1166b3ef98cd43c13ac74. 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/QZTB62342511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30279a11d16b5ce0ba28d978ea3b4a91118d3cc517ccd778827535c48e9f9f90. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB62342512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9abfd85a1a497517542007f8a5669e7a104203c28a321108c9b884f117f0e1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTB62342513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1d4a25e928e23c466e5641c6d1219831e7a2cfe48238d090bc686618a4c6c4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2428784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94af86a45c5aab39cadb462df47b97cfa1ed9952619e634a2afe6ecb75c3d91d. 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/QZTAT2402301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a979175d49979c85ed67c9441e542d41e8f30ad6932c965e4ab539773395d3c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZTAT2402304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa225fae60652125853ff5928b21938f4c549fae889e5fa1db13525e5bfeea3bf. 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/QZTBE2415377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d27a90f23f11ba918c9a5eafb081646718b112ffc4a5e99b329db90063a442. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBE2417386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d463e2f12ebdc29422b3fb1dccee12d1a9538d86a42a7332acf9449a12ec98. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3EY2411029.
Whoa Nelly (The Horse With The Baby Belly)