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 0x0794bdd0708fca074a7232eb4dea0963a29370a0f62b9731ed99d914024cccae. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42bd7f93-9568-4145-9102-b504dc48e701.json and https://artists.proofprofile.net/proofs/artist/42bd7f93-9568-4145-9102-b504dc48e701.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 0xa69dc01084e57ba45a36992467153dc76f68663a11aa08c02917eb1a90d7c50e. 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/PLS102122501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0609d590a0927cfaf8338c6a41d5d1d387a4bc9ffcfefc33691f04c187375855. 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/PLS102122502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11afe50b30b73f299735e7e280b59b3e2ec3a0704cdf80e1e1aed4a2ed500852. 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/PLS102122503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e7215017780f9dd3639f141d21e0509422b7e5ad20ef5f8256af1b3bdc0e8a. 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/PLS102122504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef865abd374f9feff6b87cf3af4bb349fc8eae77d37ec09bdcd2aac7b7fe0e4b. 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/PLS102122505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60ee0c6c786f5345ef89df8ecf052d7c9dd678b2154351811007e31b66f2051. 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/PLS102122521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d16b74b69194cb63bdbd660d348aac2c08ffe9a233742ba54130aaad595af9. 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/PLS102122522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb52013030857139dc5193c0da0c627b9efb07608c6c43241f5b71548f056bd3. 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/PLS102122523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b528d92c78eda431a5f47cba12bea01c9629a6122df249e7b126ce4b49c0513. 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/PLS102122524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eed1c244f05c73a374127ad6a9aeecc6d3fc3e471a69d7bb5ef5bbc6aca5bb9. 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/PLS102122525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944f45c3fb71a0f0e06716d7ab2abdf133d621e9f4e9ead2f7337741e8f36f7. 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/PLS102122459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efd4e14ce72584d57420601804ba4153aa54e493960b53569ff38d2802b00c2. 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/PLS102122460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feaaaed2382d8c1ab366ae9315dacb55a33c41c39ba5c367381005be954213a. 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/PLS102122446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1b1c6e36c8fe40fb454ee80d3666fba28edd59c16205e21670a0aa010f3a40. 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/PLS102122447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1e74abee47a4cceecede7256695baeba5b8311235be55bd8f3aade040ec7c5. 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/PLS102122448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330bde249e2b7db07fe11eedb1be1799838ddec39007f8d9e2cb99536b5bb5df. 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/PLS102122449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feaaaed2382d8c1ab366ae9315dacb55a33c41c39ba5c367381005be954213a. 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/PLS102122446.
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