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 0x47d9382ca50122146cb859367673286b02829d17a6ffe8290210422ac386f008. 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/d19a1ea5-1afa-40f0-95c8-54781ed4cb1b.json and https://artists.proofprofile.net/proofs/artist/d19a1ea5-1afa-40f0-95c8-54781ed4cb1b.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 0xd619f878deb8e2c41e74c2294f7fde682263c08c9529e1ee505bf6a8e4e52184. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccbb93c0b0ce0d9db24034d5ec89d56130b2a34dd28bf8a474bbcee2fec4ef3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad21cedc32611e775ce4012d6b8702ac898d9680c94e5f0e468fee2f552fb5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f42e6be316b1baf569597adea599f5df908c5b6ff35f137301553f0a0070a96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ea6e4d1a7800893c3aa52525aca45a8fa14658bbcf71ebd04231b9712d53e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb636d14bbf65e28f9b28162c8432e329e5755894d93f6dd4cef60dd975f9a93. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c41c91a0b3d1e4881ce122326094ac917221e15c5a5838dfc5b16b1d4a2914f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03138c5471fb176c87fb193262ac53afacf55fd6ef3fed34ff8fccada8ece8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062421963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91afa19e7b33cf804005e6b78b4b2b7ee35257554af32853d8dee2342e7c3100. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062424304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33adc46f8bbe53e2e3c230fcf2029c3d67d075f4e9e87ff7600e9a767e72a01e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dea814b578b00a2b4bd8553bf2b68ad0b3cc41acc28a39e04e4aa03f24ee9ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b8862383ffefa7e22da1eb28aff7ae8c7f0c04098e23cbf7a6c21bbbff0b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf15ff018345e1f12ca9a53f505dbe5ed78f0a405122bd2a490423a3ebce6562. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0df3f75e613a95851067691c28dea67fc635688d67cd0f38e53b67b272c9a33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062420937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83a8041be4afe4e7144ad6ae233084a8ac147f9b18a9c2a8dd8bc2879dbd20. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4907c831baea2335f6fd87ccb26862306f2dc3986eacd9871140f97aa3c3a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646325714b8c51c9c0c5fe28c0e30e5e4a64fc494c5531f54aef560ef5c387f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7c1237271ea2e61d57457cfc084859bbc8472a1213262491c64226df5248b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e77594323a1c7c8cb98258f3b58750c15e883b8e4430ef8d36d4cdd035307. 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/PLC062430386.