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 0x5e7cc2fd7489802c4c3acc969599f3f7d2ea5c35aa3af9467c7b8afb5103bf19. 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/1efc39d2-4f91-4984-bed9-e5a89ac1ac08.json and https://artists.proofprofile.net/proofs/artist/1efc39d2-4f91-4984-bed9-e5a89ac1ac08.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 0x357d54a0e4321297c7fbbbc6ab8f7a6a8539bf37f32e6771efa7bc47be432f0e. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZPLR2284757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dbd5b9c2add67fae574ddb239ef40b0dc5afbf616a0d2ba13af96bbc971231. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:43Z), 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/QZK6L2475041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabddf0c749f4666552d6065b8102866630c29a3b72fa7c42fb9788e9326f2d11. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6L2475043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc117daaa1d01a8a56ba7f7d5a554b1641d8e5d10840de861ed3dd379a69f11. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZK6L2475045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1257eb46507d2d541b0023e2bf72b5f4e16d2d4fb82a06162da32edd056c5158. 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/QZK6L2475046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f44eed260215f26dfa1dc0132d1e1d94970cced1399917bef12a4d16c6e277. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:48:44Z), 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/QZHN82491376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0f4c955825b4803a317e4982b4956b7b8e806f073b8c7fe7bdbee86bfff383. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZHN82491378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f9ae19ce377dcc0e78e2a63867a7058b960f81c61539b4b0ba7ce4b7c93736. 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/QZHN82491379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbc7c08f96bba2602e4bb60fb54e856f5316dd76f188a4a90e9713c7c1a11dd. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZHN82491380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf452ad938e61e715262fa770f43fa1932ef0f01d3c7187ef3b1d3bc533cf77. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN82491381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9ff3d358131067997ac725030163b48785a56390d5a3fb2be77a0465b68310. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN82491383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fa839443c14289b2909ea8407afc9664ed09dac3c89d5d1831177abaf11899. 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/QZHN82491384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad9cebdba5925b335e2553585db56b18ba43fa246a6c75b702e9bcd3e7777c. 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/QZHN82491385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e5a99ff55a4d9dae765e1dd25f71ede44cb0869d1e57dda95499c6c8073593. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:42:54Z), 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/QZHN82491386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d51a2666d2e69a9daac63dafc5044fd6bd25fd96d9b1a6fded4c69cb61c72e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:37Z), 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/QZHN82491387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da923865cb92517ad63c568064fd29425542e32c69d5e99e6346b336990e95d. 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/QZHN82491388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746fbc95eedc44eb0e2acc1b514ddeda331e819d7eaf0c435de598e02abbf83e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22496546.