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 0x856cf530fb74ed0feaf7b732e60facb6b89fbe6c614da0e7de41070fd1940ef7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6e4ddc0-8e0a-4e82-b109-06cb3cf2be07.json and https://artists.proofprofile.net/proofs/artist/a6e4ddc0-8e0a-4e82-b109-06cb3cf2be07.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 0x2fe14f9ea2a6e8a98c611e1ca1d44ec931769675c7eb89ef9502684714edf696. 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/QZTB22245333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631ad355c645f58f0fe263dbc0cb5e570b237b789402eed59059de45d22d2e57. 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/QZRP42209591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a86380c5679571ab13593d80d6f4e5cef33b6d5861fa8a5f011dae6bb2be4c. 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/QZHN52329472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7ea00e27020f80f8c991dbcbc384783541bb7fa707f07bb335be0f01e1fba. 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/QZNWU2211088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e5f6f100c322a4c8dba3be864d035a0945c8218511b80ae26bf35982b22bf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:47:42Z), 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/QZK6N2315188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b8dc262cc3248f788097230fd4477b46d14b3751b25f7150fa3be20757054. 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/QZDA62384040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e088e735a143ff60693f35caa5e1382716cfe548b9e8ad3725658759a5e7db4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBB2264137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301e8cb8f747a3ca93a37ffc2914ac1d357e1e8f176a6200bf94b9399110449c. 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/DGA052483409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fcac5eceb35cc865851acc82fa33bc55b4002ebec6d1eb46e0647adcf24ba7. 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/FRX452448800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fc193e0631807c6310d25f81768d58901091458344dad69ad43ada25d8526d. 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/FR96X2477259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6232525e79a0ecf61c22c24b90dfb07e406e9d555d0ee7b72d8cc40a20b56c36. 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/FR10S2435837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a86380c5679571ab13593d80d6f4e5cef33b6d5861fa8a5f011dae6bb2be4c. 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/QZHN52329472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b8dc262cc3248f788097230fd4477b46d14b3751b25f7150fa3be20757054. 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/QZDA62384040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e088e735a143ff60693f35caa5e1382716cfe548b9e8ad3725658759a5e7db4. 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/QZTBB2264137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe14f9ea2a6e8a98c611e1ca1d44ec931769675c7eb89ef9502684714edf696. 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/QZTB22245333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631ad355c645f58f0fe263dbc0cb5e570b237b789402eed59059de45d22d2e57. 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/QZRP42209591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7ea00e27020f80f8c991dbcbc384783541bb7fa707f07bb335be0f01e1fba. 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/QZNWU2211088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8dcedfa8301fe2b80a8202f0c4ad11abf5b917e26c85d60db7f849f5ad4f9d. 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/QZES82245229.