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 0x0a90890beb69f9726306f10f3d8bd644e4dec65d4cca35e09a6d5bb35045185b. 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/9ccfbd69-51ec-4376-883f-6a7689f0377e.json and https://artists.proofprofile.net/proofs/artist/9ccfbd69-51ec-4376-883f-6a7689f0377e.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 0xc7baab8ccbdbeb5861a5947298255eb0e64e85a2269f9d751f8e5f51875f714d. 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/ZA56E2000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c1fe915fef5febf59ac0db0243a5b515d3bd2ed92991e7f12a174862f4cee. 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/ZA82Y2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d4e568e446cf3139a3d2e387d837a131c5000a2192bc7834df8f2e1c1b48f. 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/ZA82Y2000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae0807de42763bb7c44c9032cd9f3c76aae355c3b642ce137675f2bc9d7aef5. 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/ZA82Y2000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b15da69fe695fcbadabe85dd20cc863969d75a47ac005e036ba3deddb04e12. 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/ZA82Y2000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ad7270cc78f6fa2289d376ca427ed1ad33ee90c3623547a13fa2c0bbef40d7. 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/ZA82Y2000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc37cd69ab758bfea6ed917ad1b75c9b8cf36fd85350ed665cb199e682b809. 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/ZA56E2000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7848f16ae3b47741de43b12a3b77b98462f07b044793f8b6dbe502e3f109203. 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/ZA82Y1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224d5a75b46cd0588eb4565ee6f78f075ecc0dfde7847fd93068efe56f15ba5. 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/ZA82Y2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8985e62e51f49bb58751a8e295af7936bf6489cad28c9c1ff1e6660c269089a. 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/ZBG7I2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ada3055c544218a22ca596113853800540f97a4c8edcc8430f721efeb8e0cc. 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/ZBG7I2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7e4d42f3e2375d6bb7246e13c830d1aec35ab9e7b7e39fb33bf5372a53160b. 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/ZBG7I2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449e3a50f5fcc1c1d4f5f1d97c93c6576a49cc436e0ad07b36b25873052b29d7. 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/GXF9Q2443901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d296a29fd97fd9cad16669d1176dc0869b3a760f98d7b7bf685a03b9f4748a3. 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/ZBG7I2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa940d188e3e2002e6a7690fedda7189c77d7b151e8ce5cf9e848901b6e57b6d9. 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/ZBG7I2400012.