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 0xf045f46380bc8b4fcbc13171425e05a6220e5291929e4796a7d837baef9b937b. 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/6c83d7d9-d672-4dbd-8e15-875262291817.json and https://artists.proofprofile.net/proofs/artist/6c83d7d9-d672-4dbd-8e15-875262291817.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 0x55b696362d09d26a2eb99d4d56cd1e5a0d3d1fbbd5b8189b6b7f34949bfeeae0. 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/TCAIG2493982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e492b01b01ab9bfca51032ab3a164054426c7684efb6b5616a11a167a7cb8a. 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/TCAIA2495070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eebbeda46720734a1b3f452021a8612f18f661f21cb73c2028f32055405627. 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/TCAIK2408072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd764745bcb07fd16ffdfb9ce72bae8ff98317349a7e2cc7a90d394f5822c8014. 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/TCAIJ2439894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b41c5e922516c26dc8d50c816f332f8d2db0e05102e65dd15710023da743bdc. 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/TCAIK2440155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b696362d09d26a2eb99d4d56cd1e5a0d3d1fbbd5b8189b6b7f34949bfeeae0. 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/TCAIG2493982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0cde9b0b74fc1bf91bb913f4d4dc9cbc7bf250308032b03cf1f8c0d5ca5687. 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/TCAGU2301762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a4ab203e64096fc0b1cda31e791ab4ea8eb45666a6b926313d8031abf35b23. 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/TCAIJ2471553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af05a892cbef3625ad895ce9f33fbe4b12fff84356fcde15083ad4a4834800a. 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/TCAIK2407997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e492b01b01ab9bfca51032ab3a164054426c7684efb6b5616a11a167a7cb8a. 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/TCAIA2495070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e0f511ba3b22343d55ad17543c478d56b740c9695e670c03ad1aff1e466b9e. 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/TCAIK2407960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce99e13a0165f248e8c2c51fc49d57df207c76092d322b78af17e1bf73954579. 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/TCAIL2407920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf601c788dd7144bf761419e3b3473e967f62431eb6b6f41f123f9b83dbecbe41. 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/TCAIL2407985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8545bedeb7bf05ee8612c2e4ba2e65a1c9ed4d9b9b414a6544d5fb2b9e92a3cf. 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/TCAIK2407973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880531323a222349bd5752c55b5e9d83dcbee1ff276afad711bfd359112b2ca8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIK2408017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e40f891a61e1292cff6ca040d2e43e7ecd7b9be23d3afbd8c0d169ee5a00e1. 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/TCAHF2372501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0cd940fddc642b91657edc24632101b60a5fd5af07254012b0784fe53f807. 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/TCAHE2354320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b468a62924a4086a6e189b021d9ba8211b6be48518fd93f8ae73939e1fabbf9. 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/TCAHF2399284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0cde9b0b74fc1bf91bb913f4d4dc9cbc7bf250308032b03cf1f8c0d5ca5687. 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/TCAGU2301762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fb2ec0ac81bf7d43b280406e1706e81a5c17663c171f29213f7542873d987f. 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/TCAGU2302747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a594e73afd33c0a17af7edea7ea3857ac74d954e97e8e135351ab53ff591d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAGS2374905.