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 0x0fbd57649b94be5cb69a3f72b5ef1d776c9fc8d7305df876f42be3c1d4204c72. 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/d91820ff-c564-4e65-b301-bb93df940d0c.json and https://artists.proofprofile.net/proofs/artist/d91820ff-c564-4e65-b301-bb93df940d0c.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 0xe7df1ec715ba8403b0dad67ac9a61f56083e6a5ad5ede1776195967f37ce6acb. 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/HUMAG2300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323d2d75fcf6293f90eba79538b9d3d358fc5fe03825a46fe67181b74477a93f. 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/HUMAG2100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92ea101e886d2bced1a619e36cbee68d822841658bdbdbcb071bb612294687b. 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/HUMAG1900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb187952ae83409a78213422080b40a7721a2bce5727cce4f01852a845e5ee84. 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/HUAHC1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a0259cf8dcc72d6f551005982d36b0cd3af8ef578e766c3b7d07d4821b503e. 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/HUA612102251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924bcb5e1415fb497fda4c7f1610caff65512b89b6fd9bfc36b9d9b5b3247a5c. 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/HUAJK1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a545db60020b26cb0e92e63d3e55e40df254931d4da51828bbed5aefda62e4. 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/HUAJK1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc211a2feaf48761eebf29041cc10e00ccac733fc8f5a247546fd9924f4c5a15. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HUAJK1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4391f165a6ebc4a62a4f9d4b591964360a2c39a1dc394be6fb5da52c253ad4d6. 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/HUAJK1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c601bf4ebfe3ab21d22a1e56f9ab3f21a29bb7dc0c9cf4d60f4ea5c713b03da. 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/HUAJK1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9680e826c5463da02bfdc414dcfedc387339f72b2f2ce762b457d9342731996c. 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/HUAJK1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d13912aa3b98e0865d4472f297a3ecb8ead04c7eff8df48e1dd4153a350ff0. 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/HUAJK1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44092645ca7a0abca097191d855c120bba3640da242eafee853b622aca85775a. 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/HUAJK1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e6256021f93484d7bf2793b8098167a7acea026c8186a4a9f3aae6701966f. 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/HUAJK1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8388c4c5e878b2b1a9ac881eeba4b4a99675331051a04fc99ea0e992f74425. 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/HUAJK1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac09f0fc5b7e1068d22c9fb123cd5674ae6f36ca5af02bc5acef4ff73b06e0a. 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/HUAJK1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc174472110d2e644373159cc5ab053e057fe80f2b33d7581afd7d902f9ac2dee. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HUA612201244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5ab00c484c311d72ed6ec48a3110b9f5fd0c1949b67e3eac00a174d922199. 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/HUA612202726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4f0fc761d76431e84706dc9051fe441cbea3a156ed2eb4276f8a766550bd69. 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/HUAJK2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4f31630ad83e861446c827a78432b733866fb579aa544576019b999f170d01. 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/HUA612202728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c08823434c03d05b4894864e5e2a9d8fd3d03f8d931d56fb1dc575a5cf33233. 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/HUMAG2100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516bcfa2324b99850273f93c09f1e280d0488a2b8d645180b1505693268031ee. 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/TCAGA2207748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d4465a9327654ef96d0beb2fb4cb38f931e3439cdabf2c4f1824b728d5af46. 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/HUA612202735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e9e6c9ec31e4c684a9758fd92347b1876a0c8ff2d055a4c2f3274e1305cc0. 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/HUMAG2012030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecd154ae0ed44d5cf0526fdc0bb5b34c194e41cc7bc66ab258eeb68983a8e69. 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/HUAJK1700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb1be49125afeb49baa1594c512010ac4f658a4c71bd0d4b674c991ddbe9fb8. 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/HUMAG2013111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e9e6c9ec31e4c684a9758fd92347b1876a0c8ff2d055a4c2f3274e1305cc0. 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/HUMAG2012030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb1be49125afeb49baa1594c512010ac4f658a4c71bd0d4b674c991ddbe9fb8. 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/HUMAG2013111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518d821b6a7bd508300e0f9b7850a8f124425c9ea70bd50597dca5cdef4e6da8. 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/HUB001600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b23978e8d554c5c78baceefc21b7fe31e6970fb8198a056e94ef08189a6a8. 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/HUB001700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5ab00c484c311d72ed6ec48a3110b9f5fd0c1949b67e3eac00a174d922199. 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/HUA612202726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c08823434c03d05b4894864e5e2a9d8fd3d03f8d931d56fb1dc575a5cf33233. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HUMAG2100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeea560686f0a51bd92c736a065ca8a739d3bbc590131a3bd541b5fcc92a28f6. 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/HUMAG2014118.