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 0x26b249a17973098aa91ed9f5f04f7ac756d8cc02dfb8f425e375701e1debd3ba. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f935219-e0c9-49f1-81b0-403efcc45280.json and https://artists.proofprofile.net/proofs/artist/8f935219-e0c9-49f1-81b0-403efcc45280.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 0xedd854f3b0a790620695789e7418c5af1993fd778c72981703bc01e2b427cf35. 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/DEQS92300319.
Verlieben, verloren, vergessen, verzeih'n
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e78a43881c490f24aca5520ae54bfdfc3f6fa80a9d898dd03b3bff12f47bc6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEQS92300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21411cff04fcb56b172df2719808a670b96b39a97ca68c6aafa198ac807624. 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/DEQS92300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd854f3b0a790620695789e7418c5af1993fd778c72981703bc01e2b427cf35. 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/DEQS92300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e78a43881c490f24aca5520ae54bfdfc3f6fa80a9d898dd03b3bff12f47bc6. 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/DEQS92300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02042326a506756e46b54b22e73a83bcdf77784b43e8b97af051e8a60564c700. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEQS92300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b4da3ce7e7c4a1f2bc6422b49bf0400244cf671558e810c4fea918d18b3d20. 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/DEQS92300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8df550fdfeeffa568c48ba9da4bafd002a30f6a836812984a9cdcd6f03231f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEQS92300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161f1faa0aeeccf721f2e65a501ecd0166719b7c4136a60eb6d4adf9b61d06ee. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEQS92300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd617156b7fb432f13f0dbb67b916747e828a9cc27e0e21ed726d835724270c. 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/DEQS92300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b225ecd2d8d21151d17f217967f5df98d37ce503da8d3edf3530dcc13b12c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEQS92300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f614940036121d73bbf479d208e478a062bbddf393b872785021d85944c43. 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/DEQS92300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2a90e633ee0d15bb3a3e92c1e4caa6a677892dd71f30197957c67535473147. 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/DEQS92300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddbc2cee22d9c8143adfad15cf52658b6be95c6af53c10adcacfe74b1cdbfcb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEQS92300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3bed818ef527ca8e9a387bd427d51c4cd56463ed1b4462bdbfb710b3a7002b. 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/DEQS92300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03324540b725c16a99caf76d622981e6f0455836febe6fee2b0cd1c7d82d06d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEQS92300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe268857001b70e929c3507dd6b4522c06b346f783f827c88b5c812169c6410c5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DELV42301274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031d555a61820f08a8140e51b65054af6bf03b86d9691caa8ee47d8ed412ea14. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DELV42301158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21411cff04fcb56b172df2719808a670b96b39a97ca68c6aafa198ac807624. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEQS92300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21411cff04fcb56b172df2719808a670b96b39a97ca68c6aafa198ac807624. 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/DEQS92300133.