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 0xcf4514fc00b4f9109865c600a67b2a5bdb8dc7338eff423950ee03597f8b8f50. 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/b8614008-55b3-4478-a59d-e5c7fbdb7dd5.json and https://artists.proofprofile.net/proofs/artist/b8614008-55b3-4478-a59d-e5c7fbdb7dd5.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 0x35b8256849b11094f93fa9bdb9b01df08ba83ceec846b396b86d98d290eee33c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:52Z), 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/DEVF12000697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904457cec737cb4e291e061afed5c58758ba54841c28b0e43c63c5a0578b0ddb. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTB22243791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099ae1ff41391a6ca50efa0e12938f4feb274c80d56055b0c3a0f50fbda083b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZRP42390377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2834d5adbb63be8a45836ff4c467ddd7b6f7a2c9e067fe99d551bdd322a08. 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/QZFYX2478533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e620b46b5e9eb9737e3adddc00d0399a5228a378dabaa69074f9358cb9c4e5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA52460779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36162dc75018a752d7247011d218816f8114b95576be5512efb139a3c11089d7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:36Z), 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/QZES72481028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f8f00385bd1a3ab841d9f41f95c10f7ea10c184e0b35d718fedf3659b3103. 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/QZTBC2467389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83efdb42c03bd0bf7c0fe45718ceee71efc18cfb4eb5965a3cf84dfd1bb2505a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:14Z), 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/QZWFN2403291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089dc11bb246017cd526a78b73f9a2228754b53dc86a4ce0cbdba8737d751386. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ782454248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995b5e13015d07bb2b4c8d381e2caa4cd841f2330eb70bd9958df6081665103d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZES62592350.
Acknowledge (From "Brooklyn Broke The Universe")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cffdeaffd5e64089b2553b86eb595b4eb3d1aaaa18d3a547d98fa3a2c612f4d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHZD2069479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67473b4a1ebc5071b4b86d9d6bee06d7227d32abc41e89044eddd71ac6c7d323. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZTLA2503137.
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