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 0x186b62a435a445a30954b9b76aa5511bca7c6cfe96f2b8bfeb3f9c23aaff3bbc. 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/96343984-03f8-47c7-893a-dbb32c648f41.json and https://artists.proofprofile.net/proofs/artist/96343984-03f8-47c7-893a-dbb32c648f41.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 0xa0f699885f5956742d27ba2e775e14d9f38b284affb83296366682aef16b161b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732451749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac43ea3d94be90ae26a12eeee871347073209d36812a4f9ffc5b3ff771214ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732450442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89ee18fd505ea36bc947fa31114beae3fba553deb527b019f6c48017bce5bf. 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/FRX762421825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e74847366b631cfe7a577aa51afeb59f1acae1fc656b3abcbbd4c26e620f0e2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX762421826.
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 0x6310b05be2b276aac20d205140739c19b6e5c997a86a8000a5c33b6869f79109. 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/HKG732406775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f1f389f21737831d66ecdf828a07fa400167d70ea2229c280a5d9b02c651ca. 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/FR96X2484050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b265c6adf879278926826099a43fab355e958ed9e11353b040fc61439570a2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR96X2484051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4377c753b664b6686fae24b74cb953c3e005bd598eb82bc087e26442130e8dcb. 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/HKG732382641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303f1dc780bf6d642d3cefb2c3b12f41fc33e75024d8668276a7d423a668e50f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HKG732382642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe614af55eb2698131eb07c99494c199088a31fe523bbb8f51888c0b7e20b9374. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732381216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc386ce589ddc244a31a2d8b01db14d4e73d87428428256cde80c6f556807a4e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG732381215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b76f21d8b056178125ca3dd1b12e14ec460274deb3b67c139a1d49b646d081. 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/DGA062348534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9825f86609182ed119af9e2ed4f4d2eef29f7c02ef75654493dde4ff18262588. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA052371548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8989c05bdb558a62401b20e87b99537aca40c97d9c48384920033bb417ae4f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA052371549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99992e09d907adf3007229b1a11efe751990a184856af3fb1de2de8a784a3518. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732351708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c359a94359131988becd323255746b3cd945b475b87c53b5255716b846592f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG732351709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe674bd4b123d4ef97eaee29dec570d92f69ec9f8dcd19a426f6dafdf209c792b. 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/HKG732351836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9974222e5357af2bf800cc46132958359e45a8c877a028c9a1fb9445d58353a1. 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/HKG732351835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6cfc175501ba65947be7df4d38b6f1741f5fc8a629fdb8480fa9b6b12fcb8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732305472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51fb42e5b4e3752d039100eff20ac0e37d8c891d273cc999c44af2d2310c8d9. 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/MYPM12200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea6c7bef1612769a46a89ab553060b3e230398a58e6ed437248c194ea4d983a. 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/CNZ632200870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bea63849161ab58701536109ac9f5c2f93e217858889558b98a69a9fc99df0. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CNZ632200869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56137255bcf3d6f25a6224b4a33bd0617c76efdbea4830563c85afa0c8cf4207. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732245343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19633959fb49a97754a29ac08d4d99706617a90909c8fadf7e2982973691640. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG732245344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a199e9d874c44e48532a1f1ac64ff036a20937bd00e9457e226e7acd620180f. 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/FRX202298243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbb2fd4ed73b36d62e499a2e205b973825130df31507a1b393fa1343986c5f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2225598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb91afc2cfc36762b3ed9a65773294f84312390e5b614acb897d8ab87f4d95ff. 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/HKG731616011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc576411a84436b0684fbd1592ef37a34b32c4777ecf5aee542d4e1a1fc1de707. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731542012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d0b274660a970b50cc3e129c4035d64ff31880d80adf9816c4a99da684a032. 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/CNZ632200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf39d9aac426f13e1a1d28cac9d06feb0c9836b33644393eb45d0e908d4abfe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ632200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81ea24d8bc1cb566e8ea4b50314573ee452e806085e967360e997d2015a3df8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731762013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16e94d250eaaf46e35139d8b45dd942c5f712ee0e4ba36066b8a37c72f4e750. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG731762014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb574946e5d29e8fa7f10f8c0a9256ce2e3baa2a50237bbea1e861a18d0ce47. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRX872165158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc1f6feed4cfb807bf84e7b6042e648545088c963c96c3506d1e6ee8565177a. 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/QT3T42513323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3cbfd8524657ffe32b2dbe73a3a818dc08379dc2ff5a4b33c83570f4a29947. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QT3T42513322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4add898e76726e0212e76f4aceb5ee1250c16691a86a8912fe6f6c7242676b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732495378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5b5a93620e1c09a1c2d42c57251bbdc5f46b58d447947214733518b2e025ee. 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/HKG732481579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30931481b90c9a5006f4bd3c6d4107d6af03ddb75f978b0d89db04e3037f8bfa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZJPM2453043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e94006d7d268da0b1edb07f938808915ddae1206d193973c7995d096f9467. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZJPM2453044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1254c99bda877c078f144bdaa685a44b075e8e595c8793f979fd88f68839572. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZJPM2424191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16cdcef2ee8edf665a62387a0ad4b58cca2964527ff9124f93666b5f029701d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWDL72200226.