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 0x7df99353655758c643fa8d00c777140a53a1127b89ec22c5a11a011781c1d9ec. 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/4d22341f-f00a-4586-922c-d977337276b8.json and https://artists.proofprofile.net/proofs/artist/4d22341f-f00a-4586-922c-d977337276b8.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 0x8ea7167731921a134d37f1998b759b4c5d45439ea8f986d123886b18d5d85003. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEQ022290204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a0f079a79af0c70a466777b9d36ea70c1334bf7c25442d643a6866ee38ad53. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62262773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c24d6429923dcdd5f778aae5fb0052d1752857c7c0fe6534bccc28843580c6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEZC62202767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb850cce22bc16e0be08f592a3a69cf2e8cf74e900e2028cc3aa406787628c00. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEZC62322889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d3b419315293fa81249636fd001b95b04e8c02ffecaef9645361a5e86b02c2. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:25:51Z), 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/DEQ022390394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bc88513eb2d14477c5a1aa1717937de9c77a7b7aa2e7363678f40939ac462c. 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/DEQ022390393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2d920d71ed2d5b7eb7d9e7bc3161f14cfc188d03ce08ce0d12a9c9b83b853d. 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/DEZC62345028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cbb3c7f10d281d75fe40a0d43cd754f170c0c40c52e4188c17b5be58e67e3b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:14:15Z), 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/DEZC62350154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99826359a1f69b316c32b7ad9c1a6c968f749465d7b65a6953faa13b93b30183. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEZC62362411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa852e9c2a6c9a66ed477b052bbe9044d042fa2145761aa835c75969d9a073f2e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:13:44Z), 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/DGA092369877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5bca8906548b687daffc4dbed1725aa1ef95687a9db308f5bef454cb6c3e96. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEZC62368089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc962ebbe69e706ee0fdcc53cc4d3e231d8afa3025dae1665f4d4dbf9473c7fad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62368091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2f01402a3ea5758a45fe6c2c914f9d7d6b2c307d88d54a271d457495024c74. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:51Z), 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/DEQ022391960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c042c409b464e6c8cde0a52c0008307c0ea8f777470fea3110e2ab5486de069. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEQ022391961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8cf55bcde28a430bad47318e4a88a35ad55add6689512e5a0ae36929d1cc6c. 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/DEQ022391963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0399edbdc7a6e24133e1ff91ccca8b1314d3911608c536ad73e5fc4090c98a1e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEQ022391964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcdc3fdf737e30332fbd0a9b900469385e1f117380cf9cf740a248a3c603112. 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/DEQ022391965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce509e97a736d73d23d16612702474d1e5761097c5045b29e1cbac980b28f7a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:28:00Z), 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/DEQ022391966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f149103e7ac183430ea239dbe32072c121be9ba3e9e83f402cb46c8e11adbf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEZC62441810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3a1da107f6c8d6d1867b9318f66e69162864cf21d4d2ed11e69dbfe488d955. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEFF42400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dd94299b7638720bf96f4f3f9855e25d9fecd5ba84844d21356458524d9526. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DGA0M2408872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e96316ab204b2d53b3eee77d3f921ee899d7a2f3829cba68eb27b6c7e7c7f33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022390468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2490b8e867a99715eb3dc2a97441879e6f500c5658c681e58a82197c88fc6edc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0M2408871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dd94299b7638720bf96f4f3f9855e25d9fecd5ba84844d21356458524d9526. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0M2408872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd81fbea9ffec12a9d5adc13ed5c951a1a95d10217e87721dfc9a4a6b0644ba4. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEQ022272643.
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 0xe522cd8f0fe9613a052fe8db498255a1a681de98f5ccfb018b97af29c969780c. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/DGA0T2403497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef77bd341daa2f5f3c3b3573d754a737a5d1fd86fe3e76aaa49dab2eabfd2a3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:52:07Z), 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/FR10S2541660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bac293195ef64cb31764a67f953a849773049bb09adde6c602ac613d44c3fe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR2X42512805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e523bd7ab3bfb5893b8443f8da4c465de1e10980272af12003e09e1d5bb92. 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/FR59R2558576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2838451a77dda67d2a6504343a9e98e6f12d98ffdf485d534f2390fdf4a6b26d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRX872561042.