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 0x7a858f3c8129a2c56ff975f6eae024d4be84826f5057ca7014b6aa420c7bf0eb. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6983a598-d58c-46f8-9742-9d78e08bd092.json and https://artists.proofprofile.net/proofs/artist/6983a598-d58c-46f8-9742-9d78e08bd092.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 0xd2c9a713f4842be03e2bf89a26d46903db9d1437dfda444067418f0a7a4d9ca1. 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/GBQLP2000611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6063946ed36a26b6f359e1e91213c4e5e8a08d44c9096ac11579543e065f1b07. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBQLP2000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee0b1f7f05e91ac9d59f60d37c581decbca02a1d1a5a21eef2128861bd5c440. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBQLP2000613.
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 0x9ecd8e0c8a29353bf29c4fc822a6c695002dca75d51de6596abee1cf7a1e6d9c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBQLP2000615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbd11a3b60ce63c9cec4c8458586522d8f5f2755e251f1632eef4b82fe9b2b2. 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/CA3GE1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5eade27d21b1602e71566a7747b18118c90232eaab1984ea3c9f7cb35ab863. 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/CA3GE1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff875426001df7610ca1249c321dd71e56d7f34e916b56d93b0104581977d31. 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/CA3GE1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d840eaa4558f6505d4150d297a27413541cc5266988d81c26fad5afda9da8c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA3GE1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c7ace20f4f02bfa5776af0727330c62240dfc62ee914cbfd48e102c9a5a1b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA3GE1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e858e94ef9f8557924d36674ad5c805c4dfc89c307e4159d898a3d6a2f2ec. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CA3GE1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a8d1c98dce2946f96cbec3ad8f459b121ecfbe28b1420d35a5599ac1520031. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:33Z), 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/CA3GE1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbad8378a561ef68dc4c823841704e9c1697f62ab4bf44c298ca0f182d69685. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/CA3GE1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ba09fa01db25f33c1f230fa6aa536d0ac08555cb3f3bdd6ed446f1d6b171ea. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CA3GE1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe773affe67324822b4ce3f04a166885c1286d6661bd710d64dc212dddafc560b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CA3GE1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a65b322f1464e658fe09aee3ea154108f9765bf7b4a85d9ad78571e7bf45cc. 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/CA3GE1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe3296ff267912076d9041b96bba0db94adb2b56d8d54bae47e9c557e78aba3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CA3GE1800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c5ec769176d0a1bc33118d8b1ebacb1cfcbded0b79e7e86f526f03aa9a4ce1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA3GE1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf827907938cd71c5592cb54e34918170a8b1bc0ffeb5c3b57e68cba1ac87055. 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/GBQLP1901096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce181ce5f5a9e402d39c6f9f427f4e0da3336e4c3075ecd59dfca67fa34968ec. 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/QM4TX1617819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc47089c5a4abba85bc740f6bbcf69a3d387778fb7e679488ecec8b359ba51d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX1617820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6227dce0e276155da423cf7f2aaed66202d09d0bd24721f1d74e9459cb492a. 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/QM4TX1617817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6e310f8b891fcdd9eda7e24a941150ceb2b722b3fd8857b2dbb1b4f42f2c83. 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/QM4TX1617818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ad1b1b763d53427556864761b537c26bf43ea5e39ac3d5f40819202aded74e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM4TX1617824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde58a4e8f1001860acf7c17ecb2abbd33655199746426c1befea06bf3244ceb2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM4TX1617828.