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 0xf6271a0de0d1bd449187f99a78968d77a936bc38744db32c27651a4fa5780d27. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89252f7e-2f19-4a18-bbfb-b021d7de2de3.json and https://artists.proofprofile.net/proofs/artist/89252f7e-2f19-4a18-bbfb-b021d7de2de3.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 0x25ed477068bf614f8d8f76bc656b18870058857ad85e3eb78185f46099af2bf6. 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/TCAHZ2434583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec76445534e380e8bdfe974cbe2e41597245b6a33d81639ec694945a609f1f1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHZ2434527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa911750cd8941a52b1a913805badf74d43c47c63a4d4838eef77685ab39d020c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHZ2434554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b48e32ce5668954d37d42fb7c842d34c4909bb22592a1850e50f5255a02d3f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHZ2434605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14bf8f5dce8319faf365c6530bd155dd16a0bdf0b14c4aeffe67983fd229f51. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHZ2461809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27489a0d7f3a1bc7eae09e8743eb37d5be92d883d0397b31999c7fa908f7cbfc. 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/TCAHZ2461902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e896eb570aa515aa02077ef1ef0cf6223b4b62b5283bfc52d2c9a5773a9bd3. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAHZ2461752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd02914a26123bf000c58ec0d8e0c68f35c316165bb81c1a845629f4e02b643d. 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/TCAHZ2461860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa236e55131fe798ff2e87cfe7258d65e0d66072fc09717b96288bc4461fe0104. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAIC2488193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d23f2becb32745bc40269fbcf38563d065368fac233e79c611708f5a4a5da5. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAIC2488128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3f6619c085592f1c48b80c0661f8a8809421df7678802c97e944dd3922cc1f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAIC2488167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4b9d91d203376e92de5072a94a4f5c47cc361d1e0d416679faceb5b5ce2909. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAIC2488220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097983dea8c792c651d56eaca44c839f8d789355686fe0e7a7e8a12ddf5c8d99. 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/TCAIC2488148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e8e78261fb34269335f32ebeb44609cc2fdc979690b45fb82956cce98963d. 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/TCAIH2407188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5948d51d1d654783d601d552cdffd9b4da6e01c4f657ee0574ff01e45feeb9b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIH2407145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e2efb711f0e206203ce8bc223ea24df42ad22708ae165943233b8d1efca0c8. 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/TCAIH2407219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2324f23f61e61ae00b07fff5a366e3ab5a29c9e75477a2da78763f3c96df0eb9. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/TCAII2407309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cec27264b94130159584efa442088762567a80c4c69ff6c192f4bac5c9dcab. 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/TCAIH2407255.