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 0x7ce5c35b52302965fa2d2786d7e34441788905ea6da5df631ddedaa147d03b7d. 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/5a47ce46-28c5-4427-a5b7-568033cab09c.json and https://artists.proofprofile.net/proofs/artist/5a47ce46-28c5-4427-a5b7-568033cab09c.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 0x41bcf310978065075ead4d3b4a3e551b1de29d95d76c88db53fe8511fa295016. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QMPKX1819317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e62cb04dc10758df61bb1d23db8dd65530ea894577e736d9010700a952ed5a6. 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/QMPKX1819318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c12f9f62432adf0f56f1fa4eb6530667e4e9b5de496dc17374b2a13c39e9f. 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/QMPKX1819319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6c25138148c28d916080a2b2186241c6a58c9d30871d8d8543c58e43a29854. 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/QMPKX1819320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f6951fc4163e3e86ce4b791261e37646d9de05182eed76147a55c6a61c0b58. 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/QMPKX1819321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a76032daf9946b2f9d1e365f869414bff19682d94c9d1828c4df3717ace213. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QMPKX1819322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb60decc7711e84b7c9d4b4d3d07bfb84e7e516f79939d3099ce6b05733835. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMPKX1819323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccc90e754132baaf349ce0c5f5413c53866c7f15b83c7eb508d46784bbd445f. 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/QMPKX1819325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ddcc9e57d8b35a9b27ebee2fb222443f0cc55bb16145d4c7024755d1be2c7d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMPKX1819326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c11b05b25365d190cd997bf6960bdceabc5cf035b924c4837d90a0fb680c3d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMPKX1819329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a718f54213ba17d214f1d5c3b8bb0456f4cc4fdd575116dced59e67d42bdd2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMPKX1819331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ac54b6bd4c979a92698c4742a95bc968e16b945784613de21be83260973207. 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/QMPKX1819332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64ca196907cc9bf5941773695608c61dfce9b9b44d1ab4848c10a1abf353b5e. 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/QMPKX1819333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e423d0dd6e713c5e12c8a24f39c8a569ff7660e6bd3d65abc7e1b5c5dba6a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QMPKX1819324.
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 0x2318118297b7e6ae288c071ea2c2a32b269392ed61c807496e93d66768a5f06b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QMPKX1819327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6b372e093c43e992c03a797adff827608ba28eb1ed653ddbbc68dfc61537a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMPKX1819328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4267490081a31c1cb90c70a136049e5d5fc428a3cb5b1838b331aaf2ebd4a097. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMPKX1819330.