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 0x1d3e78be85a00ba293efe44f659bc663956b27fe99f6e225cf128d955ded3150. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efa07b0e-3c14-4681-9186-78f3e1e6ecf4.json and https://artists.proofprofile.net/proofs/artist/efa07b0e-3c14-4681-9186-78f3e1e6ecf4.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 0x1256cf5105541f8056dbb11719b355d77228eba972a753c1918da590a34131d1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB1946439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9514c622c69292ede917acf5a54e508f7ca329093c91324874dfd1eb76ed43b2. 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/BXWIA1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44062e39c04959224bdc764bf67048b4cbe9a28381cf54de9410068bf61413ec. 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/BXWIA1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae07fe4f58f2652b23b130cf8f8cd5a52733594752be67fe0963ec38f00ad6b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BXWIA1800004.
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 0x3604b6c85fa588173ba18e22841feaa94f63981773ee9092e7ca324539e2e831. 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/BXWIA1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e194ef737b5d609e1e727e25bfac96c994902a62ea54443ae1cac5483f16f3. 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/ES71G2425592.
Diamantes, Lágrimas e Rostos para Esquecer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7d82faebe185149eb115fc6e49828eb3ea4acf2e3351c598dd147d13b5cb9a. 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/BXA5K2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fefaeadbe7547f19cd9d2e9c6abc1267a8f09308b0878a6bc20a26724165b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB1823493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fe595353cd08e4a7f3ce835d59ce4421fe0d72ddd3fb3f78029fac84308223. 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/US7VG1524761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9289f212d8c68512a1e28e12fdb1ecb95c3e2d0906460a783f9c4cd8ba4fb8. 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/US7VG1524763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ef92c62be7f5bb74f31ed4b33eb51a12f77e9bb22648b189c08982e862b4ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX4IU2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5446ba8ffde440cb11a02e3b305c7d1376ca9b9e53a43ecfc26b1620719d8fdc. 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/BREQP2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e194ef737b5d609e1e727e25bfac96c994902a62ea54443ae1cac5483f16f3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES71G2425592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47d5df50306d5469d0bfb6c240fa1fbd2cbf1558c9b5f7b01a120388690177. 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/BR7131300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33709beb217953b81faa3ffe550f11b68f140a23ae8b0b63366738314e3030d5. 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/BX2611800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77be92de8cf9771bf5b22d87f2706ec787b7e1571b161bf287295dba5daeaded. 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/BCF0I2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021fc167eeff907c4c12af73d2fddca9f25b996d2943562e6fc669774ef6a1d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BXWIA1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1117b36548ab178736c544c9fa4056a0a54505a87827adace9cac57fef21b542. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US7VG1524765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96a8d8b4dfb2be974acf915fe7e0f89d1d91f975f1a566fcd12cae5323d2ee. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BX89E2000001.