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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85f11864d72dc0c3cbd48156683167a82787e16fde30af2f7412cf9cdb424f2. 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/c1da8a33-1482-4ad6-b940-8324ef30640e.json and https://artists.proofprofile.net/proofs/artist/c1da8a33-1482-4ad6-b940-8324ef30640e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e4691848665719b8126c7a524b174b4f18517d74ab45d18907b5417eeaf654. 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/SE69Z2400913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcc12b1624c9e1fe1137de6270b2eeffd3008ecd73be6553ff9b775dbcb6cd5. 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/QM3DF2261850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed586ec3fb6ba17f8a4b436f4b30dd4d1e74a23a3f3d273f7e38c0c6cf733a1. 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/SE5IB2302006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21695d26297ddba105f8e0db2475315d3eed124bdcf5e9285412602636288ec2. 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/USANG2233204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba6a5c29140b8496034ce60638669f0f612d8119f4fb1d948419707409ba7b. 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/SE5IB2282305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25f44ba25c8e04a0cbbe090977a51dbf5ae47d3ee73fe312e122d0908c59aca. 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/NL4YD2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf441f2b557638f3198540e80e5dc7921ec96d9211fe1d57f39c360b829f1ea1. 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/SE5IB2258465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffae197419709d616a6c8d74120b32a62ff3434ee8bce9a6d01e56c0a997f86. 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/SE5IB2150266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8441e43b4dc975a999690161fa6b60fba3ddff076a01fee70435a74f02da31. 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/SE5IB2137909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d90ed380d907ec32a5e6b415f6e247364020d0c16dcd2f0c2604f286a9b1d. 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/SE5IB2133355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf227031a80ae213c71efa238f7e1461b0ddb8db130822c2b50672d544bf6721d. 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/SE5IB2125939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2082f0ca7ce6c2a23f4a15d73384b75d6d33f373fb106c0fd55b569567eee0b4. 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/FR9Z62100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3f8c69a5163813e147df333c8dfa2963046351fce4700d6ab9c26e4b49197a. 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/SE5IB2100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d550f743db8edaf45d8cf7ad8e4d6a68fa14a7ab664130c4984e1f61af91024. 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/SE5IB2100481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccebb1c1b284dbc9bba80b5b633d19c922478ee87137db14b38e637386407dfa. 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/SE5IB2001505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8b5a60742953f6602d1ead1dd9b40beea1fce3a963a7c2578d059807f6482c. 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/TCAEU2090674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57dd857a800a3181f1536f83ad311e87ad9a0f14195b3e5581e388d1b7f6b80. 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/SE5IB2000548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e65a4a5bc875f88cdc42d7ce8c6ea340fb9186cbb931389d7a966413aba80d. 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/SE5IB1901450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d271baf9e568985b6dbd5f65f0634c71afee5f9207beae7fb30c620c9aa7f. 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/SE5IB1800969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0474ac304fdffc18c93a71cf846f359cc37ac1ac8a40cb977b2359ad9f937689. 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/SE5IB1800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae811597087353d74c7315ad8a06bd813de60a521f106a4c0848819812a4979c. 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/SE5IB1701093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16ec0111dba4c4060412c6e7a0d14d27fc31acb09d3615769ff25d629f6e0b. 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/SE5IB1700800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bc348ba53463c9a89477bb90d0b8858a3ec4715c672ecea23389cd0da128e6. 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/QM3DF2193181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e4b654ad6c43ff521d6ea3720071f9ecbe1fc58e1ad800f89b5fee7c4c13af. 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/QM3DF2193182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76ee452780337fbb94b86f6d34932a6b782986f2e4f6af45fa6deaf2e22cf1. 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/QM3DF2193183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59b980d74c0325ff7af865afbd9dfd58c04bcf226a2b5ed6d5a1f01df3d760f. 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/QM3DF2193184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbe0557379af035da1598a54fc2916efdbb1ad925265033b38fb1958f549aea. 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/QM3DF2193185.