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 0x63798010daa5d47c94667edb48b616fd0853490d1c777cc791ad14b26593283c. 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/891c512e-564d-4f53-b93b-d51c4575f754.json and https://artists.proofprofile.net/proofs/artist/891c512e-564d-4f53-b93b-d51c4575f754.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 0x763fdef86c75ec30c6603912ad90b79a5eb1b1c31f60403ce08c8e5f96e73f72. 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/ART0G1203993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a902ea0320ca609dc9bb7b1ecabb179a96f6a0378a330f1b6eed0a5d51b43d2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ART0G1203994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c2c1a9ba40e484d07217ab45f147cc4c70f0d4d7bdef731d560a4577fe1fc6. 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/ART0G1203995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b818d829177869efaaf7f71d9bf854cf6cf913ed59c76574aad0f62605b513e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:05:59Z), 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/ART0G1203997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd395989141037863b68fe3107cd7fafbe085b7cef0f222759dc30c7bde87acb5. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ART0G1203998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efec58470343c02b070a1c04be7c36c009fcb78407ad86bd4c486797c25fb2c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ART0G1204000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead6e780d7c1d6f3effe043da34094de4190716a1feca8ce60a3516a4b45b570. 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/UKXN22473428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508664aa4bc599afdf1f053918e6d873d8b569469f4eae7f9a41cd2cc4963de7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UKXN22473429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09935270e51cace72c90e08c4d734e6d82c834ef33a780b05cfdbc691f3a74da. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBMA22489655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7298676662c24ff001183acd132a2ec0aae5bdb9e1ef9a3b9d31133f8e55a0. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBMA22489656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe366a44b80932e1a44095097825956a892c6b97e0a208195e454c12d4debacd9. 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/GX53U2424014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf767d0318cc4e7260427959ba1c19b7ba07a72f302084511a13af8f1caeae8bc. 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/GBLFP2502598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e36954b558cbff7cbb4c6f5f8c0507a24fbef1e70d5c173100f9f47a6614881. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBLFP2502599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbec22d197ce5a04964ed1912b0db07c3e49ed2016c6c476e7ea9c4af0d9fdaa. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/INAE32501087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923c0cdfb5af5c033f28b1c4d3cfb60f12b579f98c225d26ff1a56c5fb91abc0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:12Z), 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/INAE32501653.