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 0x1ea037193df7d76c4c8ec3825d50579c0f151badf8c0cf87d0a0e920fbb12b58. 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/541a1b93-5eb9-4fcd-aa78-f4698306c22e.json and https://artists.proofprofile.net/proofs/artist/541a1b93-5eb9-4fcd-aa78-f4698306c22e.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 0x1dc40fcde5de253c2e8b3c76d726daa10673d84b1b38f813ec31f559f9e6b5ea. 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/DGA0T2465998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ddc42518420e05d8e360e68d486497be4a39db0cd252ed92bf7f11d974ea9. 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/DGA0T2466000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f06b0cc251b59e3d0c93de1e0fc14e193b4dd7b63a3aaa3b5712a63d707bb6. 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/DGA0T2466002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd46eca6373d7b0c7e473329ae6ee20ae7fb7e1270dd426dff12f7eae9c16bf9. 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/FR2X42557864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7754f41ad8d386c1175e31b719606f4f12a6eda27611a92b4060b1c87795cb. 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/FR2X42557869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485f614aaef7bfcba2ccc2b3f5abd62003142d32c0ed8a0a0a7a481ca2ed59f4. 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/FR2X42557873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b028537fa9c633c9290db6e809a473634565d50ac6ea746a74ffaa66cfb6c9. 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/FR10S2578015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765bd9ac2dbfebdc0b834eca987d57abe8cdf58ec399d2621eb739ac74d27b2. 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/DGA0S2458420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dc0385470e9ca01f96f853ed6fcfc89540b91b8aa1cc71c7852732a06381de. 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/DGA0S2490929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1478c004711ae082bcb8137981445c36f608a2ce8fcf59404bb7714e4c90257. 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/DGA0S2490930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3523896d9230896ebae3e86325f17c7a16f2534f2b8c323d208a4faed879dbb9. 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/DGA0S2490936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f4a627fce6cd85e9550f70c2cb861647b3a10531a7ecbdf11827a350d56bc. 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/DGA0T2444321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549f96d06d119f160b282be36bf038ade4f1106c5d7b99c04d3e68c012b1166c. 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/DGA0T2444327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ac7f36f4bc104008bdb0defe462226752ac8650e7c93e1b7ae1c4721bf727d. 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/FR2X42529330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244d16a6830e73e54da20eadcbd2c0e29087872ff5bb17b29cb3db4a15456142. 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/FR2X42529332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118035027a11b621780e8e75ca7904ea7a57e69ede8fdb69cdbb8160c60d5331. 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/FR2X42505227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7058c1a7fe5b6e0c9eef666e18833f1ef430c1263b267b99ece4f0d7849809. 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/FR2X42505229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a20e8715765801ce13c57acea584bd6d35229c39e096f933366d48ec39ca0. 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/FR2X42505233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da10b71d12b31eb6742516475c7abf8f6d218543a2be82b23d9597bb154553d. 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/FR2X42505234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a08711b008abf364e3b046a61fd59a0f9e573705ed71c257504f7a6760df47. 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/FR10S2526249.