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 0x3e0fe40dfb94c79b73e51679a22c74495f8e407d62198426c69980b488ad9ab8. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f2ed3b6-5f73-4e2d-9f7b-3950c84a5fab.json and https://artists.proofprofile.net/proofs/artist/1f2ed3b6-5f73-4e2d-9f7b-3950c84a5fab.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 0xe96bf3873ac1e7e18e49d58bfe9b319804f35e348d1d97a6f2056187f1e25fb1. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZHNC2418567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96bf3873ac1e7e18e49d58bfe9b319804f35e348d1d97a6f2056187f1e25fb1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:40Z), 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/QZHNC2418567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f717341e7e902d959dba2f1316e41b215e636bd37986db667710e03c0554a46. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:53:59Z), 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/QZZ7P2438241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4a3dc7faf358f4b3a5d14eb4c97e4af0c800b04d17ff515387a6629fab2685. 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/QZDA72583717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc2a724b2f026d838f31f4d91ce997ce8586daeb8661b4e7bbb517267fdcdfd. 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/QZK6Q2509945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba40ca034f3d163efe277889b099ed3385c73c4fd0fd5d810fa800149f2bca5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWV2553897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbcfe122c75526e79081a6f4b48a87f87814d431e71bd84cf6a4bd7a8cc77a1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWV32518919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9c9c8b4d6577945a85eaebc298746bd77dfb9099238e41ae374fc8f5674e5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:44:46Z), 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/QZZ8A2517798.