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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 0xce73a56bca99c35e64f07c5b0305aeef7f18955b11a9dd63f2fc654966fa84e5. 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/b77a0da3-adb1-47b3-bb09-08a92d518e44.json and https://artists.proofprofile.net/proofs/artist/b77a0da3-adb1-47b3-bb09-08a92d518e44.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 0x1e04e7f4283ee363ddc6503b2f16318cd84ee46552009b2e58bbdd48786faa45. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US7VG1993053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91994673192a47e00de6d959d01a1e8d635ef1c597e2637081ee7b8d5ade3c45. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US7VG1993054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57a04e7bcbf248b8dc6788eafe7c25c8108d964f0d2704c7068b197b03efc9c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US7VG1993055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354689770f033f621572c7f4172346f4d84ce4e24ea157c89332d343dc7bcae. 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/US7VG1993056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa7a293cf0502da72a308a47a3301fc56f597c9d2e6518fc403641e0f682db. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG1993057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d671903b6d0e37ae5af39bc8068c8ffb615621073d2a9f758c3277312c01bf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US7VG1993058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84f2c659cf0e2b420973b6ac47b5e8b78c7a97f2cb12039479549345ddebf28. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ51989997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e3e1bbbd89c71c3ac21d9dd3e5bf56dd8eac7e1592d545cba4ff19f0d5ca9b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGLS2076793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467ede025ac97320ce0a23646e30efe3894770f171a24ac463998bbbd9900bac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFME2106640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb991b6d7bc2eb19d5cf939cd1d2183ab878a1e34896a2ab3a2ca96712af1a1f7. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMFME2106643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0619432d50b9d497ac7a8abd433dd501ef227295de15f67338834efabce074f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6N22259153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee52be698edbfba7ff9d87e4ab1c07455bfee34937818dba196bf68ffd11166. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMBZ92319664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472d1682ec1160a72795159460bcd1e4bb89ef7e5e3d6c29d697bd4edc550460. 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/ES71G2327534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31934934ec01e58a83d899463bbb3aea37406282495c12a1b4d999fd8e18a8ea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES71G2327553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a182e25c89752073a5e76f539a49866284f3af446578c3583191b220070942c. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/ES71G2327550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe928602dbe428cb2b403ce25c403c2130777bfb22e50f8f142deebbfdb089dc1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USA2P2422652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46a8beef8f20ec0fd5134b21abdbf68a99af73ade6c8aae27e7aaa9317d8ec6. 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/USA2P2436186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a58fed64cca20e82737470f6b8c0cd3f48f07f74be5e952684fb858ea03feb6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2P2442636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc83ab5f94600fbd3807f39affd98870aeccb4e3c7155c5eeb900c700cdbf46f. 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/USA2P2457186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146ba3b07cdca5c1d4bcef36eab6bddda3a7d1f7571c636c0057b359a456be39. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZW9L2402964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedbd5c68f06efe93fbcc1ace345c8825f04426b90bb99507206f8534299207d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZW9L2402965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f0d156c4899939d40f1ab30cd5df67fed6b2404e20bee98ec3f86890db5602. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USA2P2465452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe928602dbe428cb2b403ce25c403c2130777bfb22e50f8f142deebbfdb089dc1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USA2P2422652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4cb2420321516458550d364085b1338b38d035893ebf5cc6df997903a6c031. 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/USA2P2555408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda49b8869823e167f89d390061471cb576a7ab77bc0431e61b0ef5c22706bb93. 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/ES71G2310304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98c70b12326547acae0f09973a49851d3982e80c1f95cea4d35b182d2b90d8. 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/BK4DA2214524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98c70b12326547acae0f09973a49851d3982e80c1f95cea4d35b182d2b90d8. 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/BK4DA2214524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43a5f109da1fd5a6005de5d4f64ac628ebbe76ca1d1b3fc4ae516615191fd64. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ92000347.