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 0x92515d0fef66f4fdc46aafebe6478621fdb2f2976471b969f9fa723fe3830436. 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/bb954430-99af-49df-b370-96fd3eee8d12.json and https://artists.proofprofile.net/proofs/artist/bb954430-99af-49df-b370-96fd3eee8d12.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 0x56065dca081c9725290d119ceb2415b2d53fc4a276845512997a9419b2731e69. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ESA011712465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321087df52d08d220fe811529e97fa67362cbf025cf795a742d9d50fc91c61b7. 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/ESA011712336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76c62afac873febb609a36fde5050ed2710e0d06c2ed3a39417be4d819f0a1f. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/ESA011712320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7540032ada34c3dd75053acc88f671aeb1b38bb0412bfe41a28bed4d3851d1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ESA011712321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42453913fdc14a09ec341dc7895f583961d6f79a0e1aaa0d7f93fe9d54f216ee. 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/ESA011712319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7610fbe7f787c984de7930ce3cc2a9da7ebb82ab003e272b914f04ffdef68b. 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/ESA011712330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f783b89567b83d21063585afd1c06c11f3a95c424ff4ff1d4dce022d6d67957. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/ESA011712322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cd5194c380a9192dc1d5f3c92d3ae7aafebb81c990e95987020bb6a151d1f3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ESA011712332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4493feea4ab1d5ed058f8b2d1a6fc4742b67572cfb5515f99fc86bf8e75356. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ESA011712333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023715ef111b0428b82655bfbf2362f5c1c99d61f218bfb607d70c9f22d12d69. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:46Z), 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/ESA011712326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7d4aaa9a9bbfaf68061db005ee91169ae2b596bbfb91c01042f2a94afc8a7e. 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/ESA011712306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76835815236eb8cba8f16ef2432f4047851adbe352250d874d9c17c58a503a46. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:29:13Z), 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/ESA011714432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108680723e549083297527dc0ba5fe4cf922cb375e2d2f322aaa21383ebb3580. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:02:49Z), 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/ESA011718888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2c83b33b5026d4311295932dcc77f1acef9f193b4a05e7a62e6ef3fb241665. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ESA011811181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fd1af0be34bb2c62c33290404e09c71a9176ad4c377d6ef55af0a471737d34. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ESA011916911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f7258b3db504c862a067030681a555abc2ced884cff2cbd84f59ca13bbb410. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ESA011916914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c85c0018a8b6fa380d0c27494072b47fa8a6c6b9d5372fc2c18693ec182ccac. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/ESA011916915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e13c2cbcba99a27c90f3d1cbbe6c308ab2cc665f6a4a29b3d44df296b871a6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ESA011916918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24a43e65f9318de2d2566bcdd6f58b2f37f12c180979e913a0aa77afd177360. 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/ESA011916919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90da4c3a3567f16226efcb20f2bad20883f10bba0939e48e63ce320f0b2b204b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA011916910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd0cdc0c2c313982dc88fbcce55d6f99ccd1213c38b8748cac527e8408cabf8. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/ESA011916912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6005f7324e6a5c05c811de07729c3a1f7933d3edc1a0450ff0655b5aab5cd831. 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/ESA011916913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81db155105773fa9aa6d7187afeb7da4d7bcda22f6f5b6774c285d6a7f2c95d8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA011916916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d46ecd2eed24fb94930e86e3545df9c0298dd2525060e4f5fe07e8b9fa5f0c1. 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/ESA011916917.