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 0xe5020fceaa167664e001b28396cdb7aff24780e5e4b9e4128945e0ad22d96e57. 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/7c3cc844-4552-4fdb-9fc5-9003a6386fd0.json and https://artists.proofprofile.net/proofs/artist/7c3cc844-4552-4fdb-9fc5-9003a6386fd0.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 0x93dbd95f2791569430f92cf95fe71730ac4746f88c2dcbce9fbf243f68b5e7af. 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/UKZGC2308706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688b2747144bddf3a6741bf7139032367ceb8ccafd2f5bdfc7e490e2a34aca95. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKZGC2401570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af9679c6a28808fd32f65fe4ebb75a1acf76b859d73ba93df02356a7df8c89. 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/US3DF2454486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaf9dbf3007ed9ae205027d78609a1cbbe25280cc1ac9a1dd40905901c656f2. 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/UKZGC2409821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a67c1c94cacddcf219fe9af9b1f049e4afc859d05500d60c5dc55374fae2514. 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/USANG2465017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979be14cdcba8c7b426504bf914826e16ee272bea4c3b8035e24a60a5ace3ca6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:50Z), 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/UKZGC2505057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243e63a22aa411b3226a98e32ce855022efae2d6210afdb5e260780c74480ba0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US3DF2596724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfc7558175c41e3dfc5fcc836cf0fb381e809062e7fc8a50edead56bd3c383a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2237582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb844ef3356342416bcdc565ad5ab6f43762c899d10b93e05670933f31355158. 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/UKZGC2407066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92ceceb50a95c38ddd57804d11705a6af9c9d92df4fb81224172b1bd842bfbe. 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/BCD4N2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a9f3a3c02020327aaeafc8ec83e0cc482d1fe3a62142313ee82d0914e53c05. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM3DF2289073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8bc1c36e1e3b49c8e955131dcf900311442f2aba58e840c1f939a8a949c5c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092358155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180e74fd725046c6310a5e32456da829d73fb838c4b69c88344c42efc1c7d341. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCD4N2500040.