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 0x0245569df85b0653a520c8f2cdb889ac940ef4d861bec7b7b9af09c55424f272. 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/95615c67-d838-4c4f-a7cf-ef46d8435bb0.json and https://artists.proofprofile.net/proofs/artist/95615c67-d838-4c4f-a7cf-ef46d8435bb0.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 0xdedd9948a44dc0ec1e0137d1056452039e063a4d8c626e1810ae3ff44a87fcb7. 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/DE1CZ2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7679feb105d3d15b85ac9a3b96bd2cabb04c26d5d66dcbb94f6ff40630824a. 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/DEPI82110292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7c817677d10e722e155dcbe8de85e94f2a863e7bdd4cc27bb61932b44c7c4f. 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/QM4TX2261974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e3f3c5a0fba1f1e8739aabb6b75585c49b52898d19f1f2c116179dc02ce88a. 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/NLT2H2100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90dc27afeda84baacdcacb2cac91e6bfcaebb0d8def144345153d8a39fac3d. 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/DEPI82201180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bfe0e6fc7f4413e1fd64bdc12f6cd2cecf12b46e99ac8783583405277becf2. 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/DEPI82105714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18713a51312f64de491f72f0316084d44b01b0d183ccf5b84a4421258a6d5e8b. 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/QZHNA2214823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbc796d3ea4fa2ed8fdb720d95809f3e64576d9862d5080a1aa3569a2d29ceb. 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/DEXW62200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfdeef2285a6765df437f97226afc772753e8d2aeb9ec69668bf85ebee161b0. 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/GX4R52143925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b928b1579b8938abede9f43826d8a6bab41d4f923def72767a70f23c5adb17d. 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/GX3HH2148120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28a4806a210eee8e28f85a46835f0bf54453643f7938dc92e85c6af77151a1. 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/NLT2H2100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2388f4e5d42ad75ab69d6909666644a88c8577b2b82245f3d575598ca453f5. 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/DEAX12002034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0809e59afab17749a2ab5d5e645f0b35d5c8acc88c7a57f7abe38fc88baa07a5. 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/QM42K1915532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a263864fcd182ee04305150798cd2087dc9f466b7e5d8d46409ea08dd0c3a94. 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/QM6N21971796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66f7fb0e1f2e4fbe9790c15c62eca3161f8a1264b78585f7e98e8f3dc9d5d95. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GX4R52186827.