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 0xc7ab9466fd64d4b9deeefd576d85ced11cc6e7754a77d7e9b302dad9e52f3666. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2402359-bcab-4f22-8081-e9c0f6b99f06.json and https://artists.proofprofile.net/proofs/artist/a2402359-bcab-4f22-8081-e9c0f6b99f06.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 0xc4cca6eb82354eaf3519015c67c6730fd8783afe4d8c75e9323ea60bba76e853. 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/QZDA71976631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c9dee55e1db6a6d09a7a66d0a10b5c5e9a5d132793e5159d85716ac37d45d0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZDA71976632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc669fd00325d4790bc8e54f8072207a187e98c3a93f85a314bad8283d8828. 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/QZDA71976633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8beb60f6249af5718c22872cf59c9d3aa297e2f5a81de3690dadb4ad6686221. 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/QZDA71978217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd18adaef3c99a0d9cdeaebf36216aa429dc64f02a5f1b199ed1c21b33d6f9a. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/QZDA71978218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23d2dc20ad53dc448fdd73e4472e6b205a254a46a09a89eaab614d3b8a81866. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:20Z), 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/QZDA71978219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf88955ac8c4e0fa32b8f34daa5d1004e4e3085d155145dfeedd25a8d2a47bd. 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/QZDA71978220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa34b46c9f882ffd200eb26b251cbadc4787543e78e3f65abd1532a28961194. 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/QZDA71978221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b5d695dcb901991f5238173d5cb6056249e43cd9980f2a76177d454144ebb9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:30Z), 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/QZDA71978222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe983567ad1a8406ba42173735743603e2053f7bf4adecb4211f6eccfa2395ff0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZDA71978223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246333137a5dbcaf625a9a2226fd4539959b3bfa1a0e58076e5462dc60f84c20. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6542014533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2793f1c2ccfea6007bf5766102668fe84ed94dec4721bb1a424325c1dc91d5. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/CH6542014532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef5264dc7e816640e70bf9cec703805c4297d0cbee403b007df79665699b233. 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/CH6542014531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2b11f994b3fbaa1eb203ccfb516b55f68b31bf91b5021eb18f053103c8117. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/CH6542014530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fafd068a243b8adde8891e13f8f51653e9ea70d48a1cf24ba996e198debc003. 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/TCAGL2240901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b83d548a8c17f936cfa7dd9be505a36b47ff68b3066cf42a2fb8edb37ec7d. 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/TCAEL1941066.