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 0x67a04ef29e20764b475744f3ec853e324a156d3c6451c71759394fe7b5c764e4. 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/27db2de6-9460-420b-aa87-e27f36c8a24c.json and https://artists.proofprofile.net/proofs/artist/27db2de6-9460-420b-aa87-e27f36c8a24c.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 0x53f615e3ccb849ccd295fcae33227a895361ed27afd996daacd02a933056a5b3. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZMEN2128323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb540ec8389bcac29eab4c97f39cf622d77dff3667b13d56811c9c01efad1eb. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZMEN2128333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106ef49edb6f3e04d9da0cd800fc5197e2af294df4bc550b0f487109a78314e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEN2128334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1bb0f7a85e976d0ad8f693d36c4d5d75c69ee799cb47dfdc0f7ec235662464. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN42350172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48413c9ce1b751f86d18204f36720855c97be00f8628126f353fbff32d5fec86. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTB62364475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917aeb1554dfbadc42bd40205069826f811b6b20b4dc1ab9f31c3fcef92c72d0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFL2358657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09f44d12fadc6f68c844e695444b8384ef384bd7e240ae62c3333c2aca5f71. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZFYZ2490703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d64c488cf395a477a221e26c848b15762d63ffe99d5468e6629eed97444d057. 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/QZES92410532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f42a4f969f1396923ff36aca81cd0715c768f960b45c263e6368b0e192d441. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES92410535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c8266820e5a19c4ef83eb2919f213c8b5a1889cbb8a7dd2f6fbb1cf83af61b. 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/QZES92410536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea66cd04a09aa22960e804e94ef3622a7f160c040e98d116fcb8a4c78cf3dd6f. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZES92410538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79cd2973d512981951f13a2d0ae1e81e49773d217d9afb4f822baaadba6a832. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZES92410542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dddd9cb305f8b79bd4789384b39013adf37cd396c4e2240f06059b0cd18bc67. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZDA52549872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59a9af2fe532efb71aba8e3bccdcebbad21e19853c95a880d0864580badb232. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN82508819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8675d2545e0ead648c032c89a99d84c16dc62e00f65f1bfa8cb01734d0f6a0. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN82508820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ebbe60db45a4eed524f3a0d303d58dbdc053a9951ce78745380c064d32f6d8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN82508821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884e91d15c92705eb65351fe223509ea460960bb7decb05cb611f0500cceb2a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN82508822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c1163e2464fadfec2ad68ddb3eea66bb708507d4aa0516bca83c97e7a81577. 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/QZHN82508823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af7fbb0ef1f6761624fe1c8d999a7056acb42550300e9217912addcbcf64267. 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/QZHN82508826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac504c038e0c71f4b73610adcd98872601d9f76366f80158db1fb2c1148156. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN82508828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c40a3a9fd0586799810ae3fec68ee609992f243a71a954531d52629b36d5ee. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN82508829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4e36c9b7b89be5f7646349cfbc6ff70347104823b9b6bebb66501b9458bae. 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/QZHN82508830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a04179131e3c86f27f30d105ce90c65cb707b0e0643ca7122f96f22841c7b7c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN82508831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3341c6215360619b3905612d9084e1ffaa697c8b2044465b0afb958a760267. 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/QZHN82508832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2117bf6168b28a73256a617c30a11ecb967bbfc7328b0c8dced91cc05f6fc1c2. 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/QZHN82508833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3876f56afcbee148051daa6731cc46b41275abc66697f73f0bfaeaca558de5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN82508834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e68a2fadf33664335590bf6c43164cf1adedbb78a3f37d2f60ba0c40dca8bf2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN82508835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b53876ca92683d0dffc9c5e694694a7d88675d56799b6fc375510c8ccb00d4. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB82532717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c419ed4b8fe91b226ab61179f0e3f87d734261b8e0805675d2cef2d2e627721. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3FE2575667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8d12502043855d20d07b3f08fd671d848c4821495ea74b3a4c280c22fd24d2. 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/QZTB22350426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc937149b33f46faa082d551be0b9c40a091239a7dfa49b6d95ef0b669dd56a6c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/AUMEV2410495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce914bd68220d23bab9c253ffd7bcde4e08639533e2220ed8bc14e01fbcaecf. 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/AUMEV2426173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06a9f6fa3cbb1ad764397bdac4366c410da63eec2f4e48aef0fd97f034ad9e3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AUGBT2460911.