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 0x3976dcab6e7d6a3692c3151ec5e07274c0ab7e0103e21d9398bf9bac4a49659a. 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/457aeabf-43be-4c45-a046-48da2fd84be8.json and https://artists.proofprofile.net/proofs/artist/457aeabf-43be-4c45-a046-48da2fd84be8.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 0x87e8c2afd0aa72e3a9571458a394874713850008a67beeb2eb2f9898b317139a. 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/AUXN22223985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213bb4e58d2e6094ea4cdb903d987e7c00fd1626981ce66a4f71e1b11b576d4. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/AUXN22223986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540ad4ba3a299a136a63eedb949331a37f01a7947afc915e5df2ada798629a6e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUXN22223987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec57ecb2e9f316ce783feeaa687cbc275a08272e704b7f20182c07be400f1f6e. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/AUXN22223988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3345593c8c267c14d3a2ee99e1eea3948932bd2102e9fe1edcf758d033d9eb6a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUXN22223989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac157f03c12b4e891f9f57c9efd9fe3e28d4be2f551e9441e5bda95dfd95ce66. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUXN22223990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ed3aa421f678e2d90226c4a22b81c1e9bd98cc8af659c3149694c4b3d98de. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/AUXN22223991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395563fa8b1af7b72fd5e759a5fbb1c394348ef5950dc7aa74eb19246b6316c3. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/AUXN22223992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346d6b132aadb95ee6a4945cf74e2bb1a024903a334fc30d01fac95bfe654a0e. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/AUXN22223993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1ed8e563dda220a26939547b2dbcc5f092475dd2e46e1a4fd0c755d392a581. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUXN22223994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0ee058d7e7e4d456958fa79df976ac2f562af96e630cbc6c53852edaec242a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUXN22223995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a02519564cb186908a4d7173e21e04a184edc5305e78f0d1ff40ad55c55fed. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUXN22223996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc0cf178c2c86b15b682347fd6e8f69d80d044606b40f8805b450357df877c5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUXN22223997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2a526c2957193df7fdd64a3dfedc36fea2495cfe65aa1a208c9bec5e19f8c. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUXN22223998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba3f8c8ce593cf1cd3f437c33ef35644064327a0ca21fc0e74053da746f012. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUXN22223999.