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 0x2e06823703333c4c9c094dcc8e4f066f51310419ad9c7e089c5b75a4df97aae1. 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/f627f619-4828-441d-901a-bd78255ea356.json and https://artists.proofprofile.net/proofs/artist/f627f619-4828-441d-901a-bd78255ea356.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 0x9353d7e282d6133e6220d60f2d19a6e8d12b9e94e20251fc5b4b0eed8a4a342f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEPG51100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea307ec452cdba3f3a3f7c2a422c2afc7ad313b803a027e58a9933763281ccd. 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/DEPG51100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a1360abd2345fba1b44ba8cb5bce3e5eba9a6ad8565fe2f7a762fe8fcc848d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEZC62030920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bc350a25b70c1b6cbaaf70b266c2c246cc99b17a48b8b9faceb6a31da97e76. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:27:13Z), 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/DEZC62120663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c4feccdbc5272603106b205e18f1678859ea9310db07004ebcf9ba1d8920ac. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEZC62277337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd97fd1f55ddcf62a40ff9ca12d3e34e344c4e49f9dff18ce07066980b6fb59c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:20Z), 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/DEZC62286854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633501b89ccee5f2f01783d1b2c1d6d5d50c3065ecd42cb3e5f04dd0ee2fc4a9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62294207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe78aeeafacfc3f0ba03c82010d06c0130b9658e633df4ca5c9eb3662e89228d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62269560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d3c00fc9c1491774950c9381f001f2dc5a1f80bd53cec979ddc08293d89e36. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DEZC62365070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee9051e9fba9174189c382791b77acba9a99a1fe3c4554485ca21ae69b89d3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPH52501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2e840971cbc431532f2a5efe672c4d16f699f8a52df1b57e72dd691bceeaf1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPH52501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac7faaed90c99d4749b1e7b85a85f6d0aeeb90316a47ad12872bb478f5a3804. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:27:50Z), 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/DEPH52501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ad7f176d7b176ec41ec3b0a43d0521cc73580bdf0b9a52e62bf8a3b92fadee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPH52501007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee9051e9fba9174189c382791b77acba9a99a1fe3c4554485ca21ae69b89d3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEPH52501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dbe3a10eeb2633c700c5be57605ce117553da3f9cb7d60f761ff6d9038f74d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEPH52501010.