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 0x561f13d84286032fd01ea061406af575191686bc1b2a146ef86868d4ead255c5. 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/0cea78a1-ea2b-435c-b65a-e06858e510ea.json and https://artists.proofprofile.net/proofs/artist/0cea78a1-ea2b-435c-b65a-e06858e510ea.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 0x547a08fadb0a528873b991c36808ee853c2a94fd3eb7fbe89d18881153d513a3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEB1905560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18078bc02907a8d6b12b21c06132e72f08276096efd48e55aa805af61dab03b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1967018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89777f72d20602fee00c44f2f3f6b0fa2ae5826e64783bd7fdf09a85b869c982. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FRX201906420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c9896fdd72ccbf4f767a3e76294e021833e253e7d7ff19ae1fee06068fc1ad. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:43:40Z), 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/FR96X1916069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3890c0f022927b725fe670b7d942a1cf7d0ea9a4fffd57300b8b03641d42955. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX201906422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eacc32e1f50562b34818eb69bb849aaa81accc4b5ee11e94c656849b0f3f8f9. 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/FRX201906423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc67399be971b181d79eb9d15cf5baccc520e595f690d309625c829f061eb99. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:37Z), 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/FRX201906424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ef5ddbef8cc6e1799eb80dd509a7ee5f4c431c34bf35c73b2ae21495e8b0df. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FRX201906425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafb82ba7bee7fb776bb071d8b5c64c42b9438827a943a1ca4fc184b2dabefa4. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR59R2007246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac1c4f6333a42f594918cc0a9ff8dd8a2fac96f67afdd6cf9954ad4260336e9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:46Z), 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/FR26V2033408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458bc739fd2719161e897d2e0fcb75bda889e7c24b7eba08a6b145cc65a6989b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX762090055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad22bbba4b914d31cb2ea2ef50568f7e286729fc23b513a66ecf13e67885f55. 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/FR26V2033409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edd1e4eeff67d5c9eed59b781aed5b18edffb3e9bf3457925e9387e0d5b3a7b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FR26V2033411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab85d3aee936c7b11565e9f0a9bd86b8dcd22a7681cf67db5ff89a84c20f82f6. 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/FR96X2134343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5f62e6312b199fa8297cf1cf7ae6a0a68408a49016df481ab39ef3ed8a8168. 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/FRX872128364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15bc2eb526d39912e3ac841e46879a7cca4819de2f9e26c0aace7f4bc757613. 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/FRS182103791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe439a80f004a513b3a3d5e80994ba093760698e2d4b9abe61376cc54d76bb1fc. 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/FRS182103792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9104364dc0405de7d0d69b9570f4517796d8a85cb6a0011ecd8df9074009d8e. 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/FRX762122235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef229a3f06bfa283deaeac81e770d19c2a2e76a2ad4401fc30b99ac79481df1. 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/FRS182103793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7113f988887b6a6c19fb59a730fb85bbcb33af4166b17a6a36fe537969c0fdcb. 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/FRS182103800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89718d8e378c7c6ffbba528d8e7ff457070c0b50f064adcaadfe4817d37a1bb3. 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/FRS182103801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c057c3b0287a8ab15e9382abcd62e674d7aef39746cc72959fcd2abb57d762. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/FR9Z12300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a973ec778b49b3176a42a7c8d4f90807f0b786e1d2a33b6a75f7b1436c19f4d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FR9Z12300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1c10abe1c7981f01ea30a2ab56d1316b3b927f15080402eca6f0321e9265df. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9Z12300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587f8595b66fb074fdd9dac6f5ae64dbe109c44ca817dd5936e63b4422b38f8f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9Z12300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa0ff6335d5dd95025546b438585cdffeda96cd4363b8d32d4516eafbe5c21a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR9Z12300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b78c9f94dd17f4d8d0a1ccfd86e7a9243da8ed4340f14f2f379e7633cbda8ed. 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/FR9Z12300232.