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 0xb172a73be5d9defa40088aeb42073297f25089bba9c1f5b532ddfdd2469bd073. 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/7f6981cd-2785-4201-ae47-ee908c47a022.json and https://artists.proofprofile.net/proofs/artist/7f6981cd-2785-4201-ae47-ee908c47a022.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 0xf0fbee2b51fc969a44476a2631d9fc59a4d574d2f7f1734cfdc4f853314e3cc2. 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/CH6542189595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94712f3c4cf08eb695e82ac1fc27377479a7dcabbd49d6bd76448baa9c9ce010. 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/CH6542189596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a087aaddb1f47d57bc2a6b618f99ffa8438e844a54773079f3fac2316ebc71. 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/CH6542189597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd2891640e3aec9a95eaa05c1bf31df2bf4680be55396de3e45f0bc14b46ab9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH6542189598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29657b996b326aa3916aa6d9f3a7b42a067f6951abda7218daf5bda38c56d62b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CH6542189599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef88cd014a2dad34a0971a8e4eba28191453ff1336786327fd7b207935b3846. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:11Z), 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/CH6542305427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322fff5bca5e4cb81dc180b7edf0eb50f85c7dfa1b598340ca9f5887d3c89375. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CH6542357071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d4930a464df99a8ba3549aec28a9deb48699cc71ceb5c937075131c48caf73. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542371698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94101772c4be5c7316a8754f7216303f24e45a3a8439f0fe28a61f9553d3d67. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542382533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1cbb66c6fe9a804018edf24478d86c0e58f6b059cc43cce13dd0f2eb9d8c4a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542368349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13dabe489af9128d5a9c5793f7e7d3af796bdc23e911b3fe81fcdd3b516e539. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542382534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ebb5473976b2e2165491220c8f99ceabed4eb957cfde7e4379b4d9b698427b. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/CH6542382535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b21b42263e86b378c89866476550761442dc9df4f4600c6e1506497073babf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542382531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad805f9def2b278a1797ff16eaff0b9460dd0cc9208a35441ecfe7ddc1057e99. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542382532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322fff5bca5e4cb81dc180b7edf0eb50f85c7dfa1b598340ca9f5887d3c89375. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:32Z), 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/CH6542357071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715ed0dbb7073c7e95ac3a5fbec8b73b6a87d88686f2d88b26bfb323ad25462b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEQ322400109.