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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad31dce44667b52e96b39d8b819f05fe0e35de1e62ecef2160133e013dd0b87. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4d75740-b283-44fc-bea3-713522a73e12.json and https://artists.proofprofile.net/proofs/artist/b4d75740-b283-44fc-bea3-713522a73e12.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f89e9977109f0134a2b2181a1ad7d42c8c937218439a2cf291311b94ab37f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAGC2219323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a83d7e06aae54efccc495fdfe4052b7a3d6b981b7135d16bbe419a5ce555d05. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAGC2219330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aabccf9bd41657d4ecf533e84910fe16f889ddd89697890f04c9bbb00ba2a6a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR9W11802434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d590f001559347dad445315d22728de9848b8d319a72f2501a6c5ed597d14a5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:21:45Z), 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/FR9W11802435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0caf7b5e19ceb1b0f889649075ad4c4cec7246255a07d2858775a1bd8dabe3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:35:11Z), 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/FR9W11802437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5251446ef0529d2a3c502bdccfeeab47d14e626cdef4353cf276aed53cc12729. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR9W11802442.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552252363ffebd6af969feb1d2124b7718ce7707aaa918142f6c92f369a27fb7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12018273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f6fc127b6b4bb30b26b606e99036adb8b4273324fcc7bad74469ce0633ed2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:11:58Z), 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/TCAIZ2436613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a626fd408c5d2a0a190fdcd76483e25634d782e009ec2ab15e0a74a8adfae73. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W12465781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2e5966eee233bc6157d619f3cb9898a3183ac294dd8ce0d4b3056a8576c066. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12515885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3d8c964157a90a0eef4e34dfb2de841f1d08b00a1444b5e63b0802a1fe8c51. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR9W12465783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f4da959a344ecccb5dd6f3206a76fe8499570077c3981cf2d06cfd32ac47e8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FR9W12465784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeddb54939223165788f52bf4ca27371aae7f36726832a024bb66edccb591faa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9W12465785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924a3e4def53966bc5e5fc3a44b0d93aad2bd92c8e5b4fe7a8c7c76b2b433c31. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FR9W12465787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71635678a826d9d3530a847ecc16e573450cc26e72a6eb62825f5450129194c9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR9W12465788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8311b4d3f35cc363ae6ce4a9c35c428901f8b823e775e04ab51e009673962a3b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9W12465789.