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 0x6afa3dc6e9f496c91038555ecfbf170a984fe1d490673b1e3f4b531cc12aef03. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28727448-43c6-42ee-a763-e533562eeac6.json and https://artists.proofprofile.net/proofs/artist/28727448-43c6-42ee-a763-e533562eeac6.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 0xc382ac4d737e4a84e9c34e29c78511832d785c6d8cfb241ff4442b90ae51daab. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZFYZ1923498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe429d8edd097c868525afc405022b06643a212f346815dfa5c85bc929f2b0a16. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZFYZ1923500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ab5230296b6ed7fd85e7ea630c2db3a3eaef7a5c02ee5efca727a2ee96ab70. 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/QZFYZ1923502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a97fdaa2256e371ff63603a93f5318bb9995eec12c7586a07513bd3f994904. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFYZ1923503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40765e423b111e783d0f50fadfd18613cd214ffecf349632ef3e96458011512. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYZ1923504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bf3a1704663210e65989af43c580bb0e0c207b1e41b5da0545a1b66e1ab67a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYZ1923505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad7b595d124139cf1095ce56a01ff2cefdb5681db8140c852b34713e357f971. 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/QZFYZ1923506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda377924cc1df0e4ac4da5a2c89f537ad17b7403e85ca1fefefc16d5aed0a4ad. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ1923507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f548fd00e23e636a0d0f7a9cd2edb75facbaa0e05a57d5f994149dd62992a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIJ2461408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4511597712a5bb5da33a328519c22e9a4773ce8731310ca0bbe14b9a459aae. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:47Z), 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/TCAIJ2461446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db6fcda24df0f872993f09f662a6c98ff80a2c35a02505bf72554b1352d58bd. 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/TCAIJ2461463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34af160c7ecede982d2f412e1127be2e2ec4272202d9cec5d97f262ed88bba5. 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/TCAIJ2461470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6a4a6d8fcdf71c7de717e3c4f909bb35ab33ad0f4085ddf0493fcfa08b67c1. 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/TCAIJ2461488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cda3a6eb49fcfd415e524c97e9884d48329a7e5368b94392f90ade0a9fdd0e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:32Z), 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/TCAIJ2461494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b958420653408065d89759f617da4af5ac1477cb7b4fdb219f6470de4d3e701. 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/TCAIJ2461516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfc40994807b6277291d2afbeadc10b581f521694e4d32b203a095a0e326899. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIJ2461519.