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 0xdda548ca2bbcf1740c8259222e588fcccf0b22a20bd45b27ca68c7e71a87afe4. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e767caf3-d15c-443d-8130-fee39bc6eeaa.json and https://artists.proofprofile.net/proofs/artist/e767caf3-d15c-443d-8130-fee39bc6eeaa.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 0x4cb189658e2cddd7a7e230da4d477ee69c862b9ded4c7179fac18ce1043bebf4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAEK1921017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d944f02795a0103b63e94c8cd8de3a5ac11a8a68f2c0e09bb771fc12d8c91. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAFC2060274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5ceaf5232cc7c7e7b28e7a72397191496cb85485d35bf826fc4c3b8262d7e6. 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/TCAFC2066256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6663100d0d992ddda6bd6dea4e2900ce7c492d55242312caf2365c15c868749. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAFC2066261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c9b04bc1521070b9fe8a91b238800f3911c012b0219bc21c8ba036b1247d09. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:16Z), 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/TCAFC2066271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d5bfc73d6316e1cad9f7c6266a350ade0f53fbb1c350ac16c97e8e2101c8aa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFC2066278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f12057fd92a4261651803296b773a9d87c8bec38ce154294b739d66cd36f9d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFC2066288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeeb3ae1fb4bb50d6f5a2a50b35cc942408564c4a9ce3bd1fd56259d2490977. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFC2066293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4fb5de18bea9ad9f64c69ac914da6c23b16c4262a5dd2a4bab95cc14323c82. 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/CA5KR1974240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4fb5de18bea9ad9f64c69ac914da6c23b16c4262a5dd2a4bab95cc14323c82. 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/CA5KR1974240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce44ebbe4f85597fbcab9a5be7e35bb4173f8e502c4ba760d56c62132d751816. 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/CA5KR1837142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4fb5de18bea9ad9f64c69ac914da6c23b16c4262a5dd2a4bab95cc14323c82. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1974240.