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 0xb69004619bcf8bb68cda2187cd271773d4bebb9206982769c488a29e84f6a660. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2df96e82-b85b-48bf-b71c-040d74a27820.json and https://artists.proofprofile.net/proofs/artist/2df96e82-b85b-48bf-b71c-040d74a27820.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 0x391ac395f941294408337affd3af1a1c27acf2222bde1b4e4e857c2d1eb20983. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA72163019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d41863ec0df941e599a926e6bb9502ce77be430bb473b1c4dac306a426f7d7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM3DF2128835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd699548271ccf244229ba054df14fbf688672cdd3ed4c95d0229225717b33f7c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:55Z), 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/QZNWS2184388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2cddf06dacfd7491bf92956be26c9c465b2c2ac5f35f169aeb242a67305af4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWY2125466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ccbc3c9f85d2cdbc411ec304b085cb3465e9dfe4951607cf183872bcaecc7. 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/QZRP52198168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35763e877166dd4ebae0445e5bde0971da679836d2ea1bd8bba51f3e00215ccb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZRP52198173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2497246beda79c4a8aed53057426da4d9f4fa05065da754b7e32690e3e3d6a8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES82230570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8462757c47457ee77f16010ab7426eca41a0e3df737e3ac5f4e3c47bb31934. 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/UKZGC2302175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3129011b8efad8ad9cd722c31a4a1c818a0ff61ea851131df4f08f1147f262e8. 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/US3DF2427025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0632f6cf511ce01ce1feb44de2249f62a798789847cbe3aab11afabe7c70e6b5. 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/UKZGC2409625.