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 0x8722869f5af62de1efa18d80e5b2bc6d21d410042a4fb9925d9971beea3ac041. 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/66a915bd-db3d-42a6-bb95-d98bb5c5032e.json and https://artists.proofprofile.net/proofs/artist/66a915bd-db3d-42a6-bb95-d98bb5c5032e.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 0x5da7b947bb360eda8ac35c6febcfddad2439119806a11c4be9b2102f7dc78949. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81322263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef308b739311477c1b6ed5c18750fbcb878295e60c2ffb1609cf773dfd5ca4ed. 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/USCGJ1529773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e0a71b5b139fa4f23b9b03419e80faea65b6f9e4fb2fa63f4c898b8aa3153. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM81545816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e712338fa32d7110689a6a29a84b4c1228049ea06c5916397481d6f577a75b. 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/USHM21654550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dc79bdf092d5a0867393cc2da93ba31b7f0e0d1f1a21002997439b2e480a70. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM81602380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dcb7213ec16cf4b5fe855af25216c597efe3cb0d3944e68e4dac89fd3f024a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:37Z), 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/USHM81602382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b1169abd578e57296d20b8e1b810072232d866c18e61e8ed8a9fd8ab1c436a. 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/USHM81602383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a640fa40f00feca703513c043a0b43ad039e73ff601d504438348d7f412b76f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCADD1788484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b057f18b89f1df344cb6c5361aa4b233937cb108efc9960237d4e2c63327abb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCADZ1861162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b057f18b89f1df344cb6c5361aa4b233937cb108efc9960237d4e2c63327abb. 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/TCADZ1861162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e40f9fcd407eaec30509f78c7843ceac5797ae99af539e73c59b3e8f4a9900. 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/TCAEB1937315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5bce2d4a475b0301df17fb71b6eb808f3a15ec9fe41629e80adee0fcf07f93. 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/TCAED1976116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92bb6f824870730ae35a6244aaea92a1c3b926c9a6e1fbb380d22556ff7133c. 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/TCAED1976140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa523182deec60ef6690ed0b08e5cc9ef1297fcdc11c80bbea3ffa517913cfd81. 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/TCAET2014976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec528d7b2e01a42ee6c2c93aad2b964cecf6e52f4db32caa0dc2cb0edbc998. 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/TCAFS2116845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8686dff719f194931114d54ad82fd3967923dd0947c93f4102391ca48064fc78. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAGL2270811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d8a1306464922abffb13a64735ebc6e70739909287990c3948e8ccc4559aec. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:33Z), 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/TCAHB2317927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8934acca3205f03007592b26eb06d2c29527b1e78dbd27cd0e5ce5ccb581707. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAGZ2362044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a12579587fe24286e8507895e50c5538d93e3002aa597e83500948a0f450a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:26:55Z), 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/TCAGW2307513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bfb77019325300a46d4dbb6479f1c8822764f02a3fa0db188cb135787351cb. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAGW2308267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9b8d5a07740928a7abc6f144a86953f6da66d03c41fc2443f575563f358f44. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHB2384751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92da35626073d05edfdcfe80382df7dd0663e3fc12ee79323b5f04691630fc5. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAHB2384776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf52c05850469d1d583a9cdbf63576e00b626fef35d75308431c4f3d816b676e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHD2349791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c6aed0936790f729a7614618523f648f83dbf06ac875674a258d58aae9f6b6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAGZ2362041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2691a71ed026881d80899d3f9e41fa97ca11351acfc6ca4b49ca5e2ed930fce5. 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/TCAHJ2367595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a350389a0e27f68a96f165adc8c6411a14b32f68062462bdff9db8375ee0c3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHY2474874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a350389a0e27f68a96f165adc8c6411a14b32f68062462bdff9db8375ee0c3. 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/TCAHY2474874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2a5ac79c43a448bd75271cf1a92fb957531be15d4d930b02f46ae95546dc15. 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/TCAIC2401975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6810b87a72b44d21cf1fb3a8c02e39c0fd815a175913c671f68524b9aba52. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJM2567491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86be13e39cb910f80d218c52f1ed7d7cf90ef5277af72b8f19f6e55077e1cb85. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES72168860.