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 0xddf3613bcb4f9667e7a8e7cb5d9d77901296b8b258c82550f18b6ad61aa2868d. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90bc824b-e7e6-43e7-9bc2-4e248117c261.json and https://artists.proofprofile.net/proofs/artist/90bc824b-e7e6-43e7-9bc2-4e248117c261.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 0x4333589bbbe6ef20fc7e02ea323e468dd5cb4248454555f1f9fd79767795483a. 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/GBJAJ2400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb8b36a2559ef0bc004b425aff3852cb392e39a74c288418511d66d418a8ddd. 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/GBJAJ2400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2164b92c374181f9eb5e6f02ad8cbb10e8649093b09683b65692d45bcaa5c9e. 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/ITA061302361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50f2e8c242214c0dd296266b7bdd691ff8ae0f6a1bf8be0fbc213505b52f0f9. 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/ITA061302367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0492534dc0f04cafed3f36a45bd8394ea50e4ec50ce96f5cca471b873152c520. 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/QZG2X2406689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0964f15321f83d1a82816ef9c9143dbf38463a40d8b12c4a1e8eac192f165836. 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/QZG2X2406690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa506492bf19e06600cbd912159c14fd8a881af0376e38e585dae024b0f7634b6. 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/ITBHZ1500926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05257fb13f4b2d81b33a264ac63c515f755d22ae36a7d25f03241672dabaafdd. 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/GBKQU2318023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14861d64fd83ee24d8bdc778a038f6579626c69eae60fe242d3cda97f858c56. 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/GBCEN2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42ca288d69ff4fa6c1b9f9d8ec75e08021d3089a926a1c5109b00edfce3c22. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBJX32160025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab9fd0df206bb54863cb93127f01fb2338ef5881e861e3893bff23aee44a103. 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/GBJX32160018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb65e9404cc711a5c79d807b311e1eb2ded9f6226860743cbb7451261a2c6d4. 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/GBJX32021014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346a0c9102c3974eee1166e17d3d9a1e5a06e24c37182681528adde43ba285bc. 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/GBK6Y1914301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edb775c386c52895bb72d20a4681797c5168d4671723499bd7c7ea5700f58da. 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/GBKQU1964889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc0b8cf74f46a92352b30fbd7b357fc15ae2235222ddb8eec6d2adc7d198585. 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/GBK6Y1830503.
Solardo Presents: The Spot (September 2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c56c41221cacbf9e093cc2fb730c5beaf947f863023518f25e530d60be5d674. 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/GBLV61909374.