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 0xb45d2520c9f29f688d8329e1e8fe7871a0d62bf129beb5a75db97f8531dd0547. 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/a11f1fff-b033-484c-a02b-defae30d6388.json and https://artists.proofprofile.net/proofs/artist/a11f1fff-b033-484c-a02b-defae30d6388.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 0x9c3493e4b1f6a2d533106dfa0f61138f73189e892d0e05e5851d5ba5a96f3e5c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA82276352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cd0f2dfcd323e76095e96e26fe1d2e5c77b74929a6aef1c197a4586bccbd66. 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/QZDA82275841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03bfe3b404501f8996c0773b0a8e7321995cb1a5989429787f5c42e76f986f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82276349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ecd156be48c39d5ff226c2ca44dbc0981fd7b8600b182ba377bcc3e9ee0c9a. 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/QZDA82275839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ff4a75b682aa174ace73747e896089b4761934b3a9d7d32701cfe8e1a59c79. 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/QZDA82275836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2be436748fb0a387fe173e8dc11418399181e81b1f2402e704569fa7dca9dd. 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/QZDA82275837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd488c7487f7290c93ebe7ee23bfc044e862f03fe512723e47be5eefca6ae1191. 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/QZK6H2346510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269f4739fe572452b32726f0b6eccfd7c256f1809a959190ff6d57338eb234c8. 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/QZK6H2346445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52658f713b63e8d810ae143fe60163c09844ab20189b8f933b9674bc6a4e9382. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA82276351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03bfe3b404501f8996c0773b0a8e7321995cb1a5989429787f5c42e76f986f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82276349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cd0f2dfcd323e76095e96e26fe1d2e5c77b74929a6aef1c197a4586bccbd66. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82275841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ecd156be48c39d5ff226c2ca44dbc0981fd7b8600b182ba377bcc3e9ee0c9a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82275839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae02594e9e5f0f4d70db7b0afe988ecf97b15d1844db19872920cd643543c6. 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/ESA012183148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6275f3530edf598a721faa44610bb02c26db7ccef210d3719c7afd985e5d2179. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPLS2209465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae02594e9e5f0f4d70db7b0afe988ecf97b15d1844db19872920cd643543c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012183148.