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 0x123e5eb91c8abccc6aa8e2ab8c13087982b42727ce6ba7f3b6f7cae77376062c. 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/a6369523-d7a7-40be-a1c3-b9feae249a2a.json and https://artists.proofprofile.net/proofs/artist/a6369523-d7a7-40be-a1c3-b9feae249a2a.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 0x627705d71835a792482707a92a0a1039696938bd15ac5fc1549ceb8745cf2322. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM8DG1810938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d50486b008b5b2d371f3955e1a91aef0595bc8edad9ef7cb74bf68cfd2570c. 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/QM8DG1810936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0e76d2abe17b92a48aa5392cc1c9a3e3b714c4b0d93d222a5a7dbfb511a93d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM8DG1811054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf962faba351a664a9ed56fe2822dcd5232c8a6c69be10b0d16016e7fdcf9ecb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM8DG1811056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16306d3e1d7a6414c7f1f3ef3866b445a40741bee0cd2fccb4505247943aa74c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QM8DG1811055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda20ebd0be15a83ac1e286a16a93bf1e8fb46d26746cf5d83ac78cbd01616d7d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM8DG1810937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38552f01cbfd45472a729bc6ca6d02c2dc76caf8e75917ab2aab054a14e4e249. 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/QM8DG1811057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9307245cb0711c037a29dbd3aae4b2a20ba2b4c9a2428b0ae0ec2eeefe0f7b56. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QM8DG2487169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c61c27714580725856b5608c5b8f7fa79e25a1abc736be27f641fba9a27bf0. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZMHP2464622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd089f658370fda378c787db8ca1594f579b327f7f7df15ed60f311db67afa384. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZWFK2301053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d9784ad6ed536bef489d528b55ddb7baf38959e8ef00ac1c77e8d89856af86. 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/QZMHL2256207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e291568532d5a48ad114aa0d0f984ac63a8c7099c95192e549fc57e9f31c7d. 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/QM42K2289969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a47d18217ce6095f5c7836ac28767a4eb302fead6dc28a5f0d340302669df4c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS632212994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e93ddf4e4061af47193813f523102df2c8c51a04c0564ec307d3df1f0166583. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHP2097723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697c130758a3ca5094971d20dfae01c2cb73b2dc759b6a732ec1380a450f4226. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZMHP2096224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488bbe3fc052b02bb003ca2ecce3a14c36a2a9abd0f81c7a2fc530aa6e9c92c3. 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/QZMHP2069768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524aa6621b4e085b312bbd824c2555afa70bf7f72c3c2033fc055be9d5848941. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMHP2086922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac4523c0218bb00aad9848cf653a43c2189dfea22dd2a14f92924922891f72. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMHN2005932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf5ebf56b0ad9d9806d3425ca17a693b5e982b417659d904bc8fb1c26a76df0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZS672125242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcba711dbf81baed423df3ba37c01e8b02b935e2e9c30c79e6d19cf754e4efc1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMHL2046620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d15b5df97dbd265dac9b0c914645e97c8f315e5355b575bc5af479c59f20533. 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/QZMHP2041533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e3b2ccc19fea275df1836033ec24b957761269b82b1ea48a9244e0648397b. 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/QZMHN2047470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbf337acd09f3fa77565056e7fd9bb23179fceb2c05e805746a8900d970fed2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZKDK2184661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84466a6f9b0e08c5b9a8e9efacb282978f2579787f7e8d3b5acc2ba1d6e4dea5. 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/QZMHP2059704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93ac063baed6bbb3ed46f1a51ce27fbe2db813071e2aafb262eb40310d664e0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZMHL2043477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a88ce425c31f74304a4ccfba02460f4a634251d975e8d200977dd12662201ad. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMHK2044441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7ac964ccdbdd1c4300df99ff78ff25cdb819c210b96171091ee6b7a569bdb8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM42K2130041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a2688ddfdaa75496894c29781b818467954be184121e0d4f3772b5e1dc49b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QM42K2164325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4febf9f93db9e74268ec102cdf9f532e9a086b7dee15c0561d3e27ffb907966. 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/QM8DG1811062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc00b0ff95d92b90bb38efc2be19c5c3e90ac4d4cb159c70118450ccf54466. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZF8N2082350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8540f1ace19ef93718c016953e392b243a7a53211f71eec172fcbf5addd87f0c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM8DG1811051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c8a3d9aa67f11f91c58e4138b068efd38c412ad6799283d33f49cdf4680adf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM8DG1810935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fffba808b5403668ae0417e1b68a2bf3cb600d5666fe7473109fcd2b514bcb2. 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/QM8DG1811059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3baaa709086d0200887705e314bedef2705dd3b722bde816c46b1e52e7bb45f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZHPJ1932184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490c0bf4cdea40d79f571da3438bb0e734c9fa345269ea68fee84d95faab2a1f. 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/QZHPJ1928384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf847cf96b71075168f6c254d60cbdbdc362c499d9696a87aaa01453e6e07e594. 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/QM8DG1961048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72edfd076b8043b5a1a3d3eea8f3c62cec6eb16b13fd9bbfb688394bead3bbe6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZ8251903544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4349b2c9228eea66a5981fb62154dd7625e0c507cd3e1b6b9303150fcd6051. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZ8251851900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e76c03b144cff0ed09325de0e6391fe35c50cfe21fdbd0a2e0e6d8ad9d27e. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZKDK2031283.