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 0xbb9199190f75457afb9a03a52128a4a4e320c250ba7f9e65a2076b463984ae16. 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/21e93516-d103-4828-954d-34e36bd611e8.json and https://artists.proofprofile.net/proofs/artist/21e93516-d103-4828-954d-34e36bd611e8.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 0xb2793e441131882129219ad4c202a6db7faeb3108099cd3d92a372d7bfef8e94. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPG102301591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e046d4be293edb30cd67549293a09395efe3db9bcd3143edee44f8c563ecf8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPG102301592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089570e36242c804d905c61c27aab92bff2d04425fb2564bcb0fc7f0e14225b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPG102301593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff0299594ee1a13d7edaa70fc1f182aac773ead9232655f2100af83910fe508. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:18:38Z), 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/JPG102301594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410207d7feca49e3cab1db3079cb6eab1a2be228280383784d6cbf54ac24c029. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPG102301595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10286acdbf43d22b4fc6ba5c9d49d3fb3036ec779f0a34881c8622460a017cc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:00Z), 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/JPG102301596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36409c869499e443190601a801e5bd8c26e69aedb8644e039502d99a691db9b9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY42345623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1a2b43d57a9dfa5dfcee72b13989d692d549a50d50154c4512179b70bbe813. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAJI2518450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150da2c24238748b50b2e23487ac27f721b1eac9c87b20dc3d777ab4006f74f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJI2518511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e4ecd44782137a4765359e5b179e2eae923c9a5f495a59f42f74eb894f9a0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/JPG102500600.