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 0xae3cf288da91a164b99024aa348bb5fac71942c3b17a3b36f8974d08f3b6c7b7. 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/81f25507-4ac4-4502-814b-60dafad2d7f8.json and https://artists.proofprofile.net/proofs/artist/81f25507-4ac4-4502-814b-60dafad2d7f8.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 0xf9221fda5267845858b6c62ec310be1ae5ca54c237dbc08d58f9caf66f835292. 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/BKZNU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7864386f89890fa89503567afd85d1c1ea6190c86c14e54081877c60c27e36. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BXKG22403005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53a70e3abc13db6a988cd7052e19b4170baaa8a67d1a711ff90d58e0cdbbc61. 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/BXKG22500419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef00ca725b6fae7f685fa58981513c481aa912bfab23805763fe056ad2450ab. 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/BRKUY2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf8f2e6b3d0304bd998cf80d0872a9fbd04012d49fbab538f3fd92d5cd156ae. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BXKG22500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0d15ff3797151ae625e0a42ca1ac4478873075fca7f0ac4b8dd5ebcb09e0b7. 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/BXKG22500415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941d2b13fd8b1ab2a8929ceb26600c96e3417528b1361a84a0d3a393d89e828a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BKDFK2400394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b013f36107525a4cf8fdd73a6ba54768280abcc2952e587e5395e018979a4e5. 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/BKVYY2500343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86bf1d1879c042c410bfa509d8372ae7c16e78da7bce1ecdf0d7db6abdff0e0. 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/BXKG22500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d234dceb88db338197a5298a8fdb3908de7b80d36ee76ca7b223a84ed0edda. 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/BXKG22403105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ced2ee7c0dd04553b875a2322fa289a82a0d7f5dd9f44ed72ca27824102eb09. 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/SGW502290800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd579f161cf57656aa79c0fce4774c6b4780340215edf95ddaf8bd89b2a7a8a. 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/BXKG22402846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874957e55675915d15ceb7f125f50fa6c2b6b7fba79b5e08bf8ddce3eba011c7. 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/BXLVE2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a8ab51436aea28df1d8a1efde8a971fa4303e63422df4846341b6e274587ad. 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/QZNJW2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd8a86e7151d66fd7b5056101dc5411413a1b0f56a0ac4a1d9f2d9453bc85ca. 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/BXNT62209369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af41c42d1bc2754354987460165a72777ecc97c6b63a44cf6a0745bdbd2a10a. 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/QZGLS2409272.