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 0xd6f43a1d13679031ec4dde97f93f5e30a3fd4dae9b3cde0fc09f4636606c18c4. 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/eacb7db3-9ecb-41e4-bd8e-b0334d86cb31.json and https://artists.proofprofile.net/proofs/artist/eacb7db3-9ecb-41e4-bd8e-b0334d86cb31.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 0x9a198125f8025b28cb24a4f8bd12600ae3194e718cf64fa3408586fbdba5a934. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBLLT1708690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d5a953be81beb983e1b871164933b833647843f57f4774bee0f11c79f4a269. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:43:08Z), 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/GBLLT1715879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1786b900b189d68c4da23b1012b369e3f37fc923d7f70625a6afe8723b7be7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBLLT1833171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec57b20e8143781f5196c6da1e54a3f995b71e52d62d8e9558052f1229eb9a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLLT1833175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6680a18f7165a35780c631f73b182d6cbade5f6a473952f13c3075aa0a5f0f39. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:50Z), 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/GBLLT1833180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b30f5afec899ab895c04d8e49e0d77b8cdb050dc217dbd7c05d74007e2ca303. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GBLLT1611442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b401a0e7bc6e5928559d25ea2c968c12af077c6a5dec70f7c802a8a8790a181. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:51Z), 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/GBLLT1833186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf8913bfb901eac8e219a3a88951fbd540339b09b75207e3cad9ecf9adefa59. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLLT1833188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bd2e780dbcdd1ce6c57e64d5e340eabccdd0a5487aca3f5dc4350c109fe0e4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:42:49Z), 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/GBLLT1921051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93bc654f3620df978c1909d3598857f2fe3ddccab1c9a4c74309d61e23a3a76. 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/GBLLT2016487.
Nti M'Heniya (Chaâbi Kingston Live session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b23c747dceb46d5af351e8405d2277c1c6d6cf48c48b648a4d29bfbc089d23. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLLT2160160.
Berrani Ghrib (Chaâbi Kingston Live session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7425bae9fd1fb5eff8399f87e35fe29b4a928bae810218a1f27d37f5941b63c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12212261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad30e3859b6edf03186e6f49b05d2e86ac0cc66be93c8ee7c4f987a6f53a967. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:11:17Z), 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/QZWDW2207238.
Hchich et pois chiche - DJAM (Djmawi Africa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5cbf2c86001cbce62ea442ee5a4294d327c18b78bf0916b5085d9e4d510f82. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:28Z), 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/DZA102501555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3806eba430e87bf1838cacee999cf71d76361e8ba737feef099d737a1f6ba513. 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/QZYFZ2307564.