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 0x44fb855e1c73ebc988bc3ea261d853648c6b130fa3a9c5ed79d250860c083e55. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28ec3f05-550b-4868-9836-3dcc57c03707.json and https://artists.proofprofile.net/proofs/artist/28ec3f05-550b-4868-9836-3dcc57c03707.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 0x779b99420f22559a95e3d6c220a9d45c509f08011d87e71d58b4c7184bc97947. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/FR9W12351587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c743133d95b7c0f4572ffed7729b39dc3cd9a3c9e35886a4252efa3eedfab28. 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/FR9W12351584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9dca55104a1c217ab6cbdd1ee58b4318e13e560c66e91f0983cc44db1548b. 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/FR9W12351583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c743133d95b7c0f4572ffed7729b39dc3cd9a3c9e35886a4252efa3eedfab28. 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/FR9W12351584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6196faecdc171f9161df4c6798777bf7b2f6ac0dbf1e72f414d7051b0024d4ca. 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/FR9W12351585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779b99420f22559a95e3d6c220a9d45c509f08011d87e71d58b4c7184bc97947. 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/FR9W12351587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9dca55104a1c217ab6cbdd1ee58b4318e13e560c66e91f0983cc44db1548b. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/FR9W12351583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6196faecdc171f9161df4c6798777bf7b2f6ac0dbf1e72f414d7051b0024d4ca. 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/FR9W12351585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe802c419d7e6d6d4f74a722ace0d5e77c87b38785e957cbd3ea35ceac2b42474. 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/FR9W12459128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd59e29099dcc1e92111118c874e618b3ae7c2b88c708a84f3b924dd03c1ae56. 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/FR9W12459129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11bc9d0b325375c46a64e8ea7398da6a6d6b5e2f891441a1670a14e2d34ecc. 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/FR9W12459130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9050aeeddcfa9aa7cde97433fe8b113ad7b5d5eff61656225f3c120172b04d. 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/FR9W12459131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b854a336fbd2e94c6773d8dec69e9c2d1b7c8033dbb2e2c47c9520a8323ceed. 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/FR9W12459132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3a76e120bd4f7b2d804db9a23764f11b1206caff364482fa181abbac49f913. 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/FR9W12459133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be4795148421c92896807dca037f7b00df6afcf0b7d5bd2f76febae738b061. 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/FR9W12459134.