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 0xcea90d14f088682faa8e7daf4b70ee2ed84eb2f45147d76dd67ca6462fbe2f0e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a53ee49a-4a36-4d24-b9a5-63810ed13e62.json and https://artists.proofprofile.net/proofs/artist/a53ee49a-4a36-4d24-b9a5-63810ed13e62.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 0xd1550fe0fbea523f9832153f3d4f5431f9f013efb3b52ae3e739281c486ac1cc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:08Z), 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/QM42K1932619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20c1dc1cf139d2a5004c04f67f96475cf1dcc2b069ebea2e8f429cc12967a8f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GB7YL2099502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6b76f53f17abff3ed7833c81031f505035c76b3128e3118762eb9ec1d391c3. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:18:02Z), 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/GB7YL2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42b9015d7784a5e82362b5dba00b62dbb009e8fee950390941a1d12dd2e3b70. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB7YL2000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ab48c7b6d984df99e419e4a837ecdb363acf47fe429669f1926e1aaee14d2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GB7YL2000064.
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 0xe016320b7d00646dac4668aff2227548f7b0fc02a9f96b2a5364aa787193ea69. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB7YL2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e1da49b665d0599e5e0b98a5c74e223a85c26f8487a478504dfe645094be51. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CA5KR2332496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f31f5b968ef45500b5bee1a1c74da4eb6cfb29268fc4afad01e724c2c7dc33. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CA5KR2384623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67723c9f2ab1fa4d23f109cebf6a0d1fb435dcf51b1213aaf931c0a38e002c1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CA5KR2384625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e48bd242d268207d7b0aa6aac775a6e914522eb1fda07547445d32e88efcaa4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNWV2414881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ae6f9d2d0640e683599ff8426753829fab7b3f0f315f8ceeac6ce66d301457. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB8KE1950845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438051a6fba4a7464324b93408c18e625a53e305c049efe0bc6d7d6b98cc2499. 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/GB7YL2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311b4f1a0d1ddcd8c8800ddcbcef1415154b091603c2a6f9e993198a1489636e. 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/CA5KR2332493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1f48fd2108cc1efbb3741e1b01d4cdf46d57bdbb84d463ac6d698265d69938. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GB8KE1950832.