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 0xd154bbf8d1e4909d5940bfdbddaf80778f9d2321d94e9b9208acf98914f4ec8e. 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/c95068c5-0bbf-4884-bf22-0b705ab85c81.json and https://artists.proofprofile.net/proofs/artist/c95068c5-0bbf-4884-bf22-0b705ab85c81.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 0xf18ce404a6f353af6bf18b0239ca434ab2fb2b6bff0c6df8268f8d9cb3517ea1. 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/FR2X42019161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a421ba55904a5ee9cd6290d23ec914390bb0ce9b124f206df2b7c8ad14acc7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FR2X42019163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf766600f1a1411479d6463b4d383e670d20bc8fc291a2e12fd5fb4220e53e681. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR2X42019157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79ee24baf1dd222e16325603bd6ebc90001528c8810446024815657e5792267. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX201774181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfb7def52e1dee33fde8bcbd5e1d8cb2fac76a5f21dd2a261adf6cc7ba1b519. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX201774182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ce1993e54badcba8a39dbe750f03d2da7610d9f9c7302db7d9c7b9aa7cce32. 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/FRX201774185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2bd06cc3937657234ef36c41db7666d70da4f84bb145dec6e37e2b19fadaa2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRX201774187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e89e8e225eefd439e4f12cc4c0676fc74a9ccf037b844e1c5a9ec3efc61ce43. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX201803397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bfcbe39d195a2aef612689ba7b1d2519b812ddc06ac209c982ae35dd3918be. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX201803400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15e16f2787c83d36eba946130f496fcd8cb13eed287fb18177639b6871541dd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX201803404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbde006192414282763d3a402a5a4181fe0771216a0407b5ca354e2496e8632. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FRX201803407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330f49c7c76199c70740f4085ebe4995f68b9e95920ac38a8ad74e94aa52c647. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0H2315234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3dcf2e5606525b1f148dd357a61bf8d63f0d2e3caf1b9f16311d0ce466ee03. 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/DGA082347639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f41c4a00f545338a5338c46b55e860b018670ca54c10ae90def46bab690d32. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX452477105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576ff71d1698965bd6c9f7c8d9927a285dae47c226bf9ae27e77bb1eab582b04. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR2X42486862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e807a3df64cb0d247239b2c360f07db1e97e85094a2d6bd339ae80fd8be12. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG731681340.