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 0x455888e04584683b04f75d1ef1d122b05e28a6c22f7b0187c65502295a808e9b. 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/be15f14f-d771-4188-993b-3db5699004f9.json and https://artists.proofprofile.net/proofs/artist/be15f14f-d771-4188-993b-3db5699004f9.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 0x969706104295babc1df0482231ef29226d19dcc01b8c21d6e7d6a9d6a261a30f. 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/HKI499702301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b36aa7d6d2915b1e053f6f9885fe9c403709159ed7160890c20dfc3109677f. 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/HKI499702601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68d6d2631905e00886b38759fe6c2dbab8b6079e79fa5db586073fc74c9577a. 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/HKI499702603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad823ac21aa906bed1379923a53727ffb2bf7d0e1d39e0ce764d77f9cb86a6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI499702311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565d3d42a231b362d1282ea7defb655818392a4ffdc4c8820312f56f9107ee18. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKI499702610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80e37408c3b40650c0ef794ca8ead9d9bbc9a2fabb6d196ff75fb8de0595c9a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HKI499702611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082045095c0f0055916837c7e9d985c85d14cea2b80280265003606f3ffbfd98. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI491592019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe7c1ed0ed6d7363b800c6eaf89bcc7c52f169ad047b759e0ea7adf4bf56299. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI499902110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10cc63b5e463c54468dc76ee2e9030c8f5e98ec19996437d2abbe7b262f121b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI499502402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36138aee958d4cacdc53a57450b163ca02ccf47dd03c495defcd57cc1f9757a. 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/HKI499602101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969706104295babc1df0482231ef29226d19dcc01b8c21d6e7d6a9d6a261a30f. 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/HKI499702301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402fbc8003451022fbee6877921e2938fe4bf7c745a7bfddbae24af325714508. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKI499702303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68d6d2631905e00886b38759fe6c2dbab8b6079e79fa5db586073fc74c9577a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI499702603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2456257e9c9a9802ae233e81ee4f4c589fd2c2be872eb3af8fa4e5915102029b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI499702602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54077b72936e0fd7df264a37e83c9ba3412a2e532a19f06e267ca54a14cb8eb1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI499702606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cdab1be261fef7729fa8658e62fd9a0ef695cac59c4ece524f65c9d88f57a9. 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/HKI499802201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b36aa7d6d2915b1e053f6f9885fe9c403709159ed7160890c20dfc3109677f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI499702601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10cc63b5e463c54468dc76ee2e9030c8f5e98ec19996437d2abbe7b262f121b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI499502402.