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 0x6f6424c965b21d082fef831c9a1d73562c0a5ddedca52602ddd2bc2038b3c07b. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08d1d150-e1f7-4da0-a1c3-62bf95efa2c5.json and https://artists.proofprofile.net/proofs/artist/08d1d150-e1f7-4da0-a1c3-62bf95efa2c5.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 0x418fbca783bffe1cdb0e08936ed9768295c446a88c2ee873d2a2731299d43ce2. 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/BCKWD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816685e15801d08abcb08ff606c030a4327a988459bfb18d6c7574c08e3e1916. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCKWD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b9868d048f579b99d0f4e584d4a213123c88f255fce4fee96ce42c2462b78. 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/BCKWD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e18db0e79b72da7e36c2fea9fdd7ff0de89b4727536c87c2e227e5b90522e66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9K2495716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba237dbbf14a994f9b3f80469c9c26ed2bf86d4a5f43f30e10b115cbd487585f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BK4FL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bb98258256700686b3e2961c104ca606006e4cc0951f965fbe070e187d61f9. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/BK4FL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae94715e28a545b17b15aa27ffa72c9d1a6f7ef6fd289921850b8e06aa791740. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BK4FL2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5938e33c15a26d956d73274f5e2fee75c12fbb3edb3e7a16ef001bc186c447. 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/BK4FL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8c79f30b11dd617a0f2962988552bf7fb378920101e0b9604c19433a31a2e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCNRU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954bf8d85f7df801530abb48e1dd3c3df069b8ae8f213dd0f8c6790a9417d844. 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/BXCKG2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2600e3d4f178458f4bbe7734ace28181003b394723be6e00b85fd58bb786b4bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXCKG2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed3dad5ccb77f0897c53e8cbfe0f3274604c852f6d6ce8135c3229eb6a5d1b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXCKG2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba723518e1a22a5765b1b6957fa5099c9bb0d4859912aae66938b9fd7d519ef. 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/BXCKG2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8b3ecea3f3f208e3aff3d3d2a5a549e42fb4d6c1abd1ff9f6c62d210e6edae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXCKG2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6aef758615341ed17dc60cbf67c30a0f0be4c152437c32587a242523f59f9f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXCKG2300008.
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 0xa829ce3aeeae12b12bd011abf8230819cb93bbd87e7c9f2524fe9280907d5d49. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BXCKG2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab6d59206bc82203ccaae3e78d4606980a2f54bb6127a5217f173f26f410667. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXCKG2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac843347f55ac3312fe8e416ffe152087fd14ffe696c4e4ecfd0b32cc459343. 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/BCBL92400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec1d49c5c6078b5f82975fbdcac5863abe041f8a3aa70e17a5c34a981c18faf. 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/BCBL92400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba22b1a9ddf03fede090cdc238487217cbeb8f3b3359f9a3a15716645a7cf1ec. 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/BCBL92400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1e17537e968258840174b64f3d251c56bc51b572ba46eadeab10889c6508f9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCBL92400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8763c3e7c856755745d29a84e33e9b02821edd908a0e3d7e19e747f1e9cf7c80. 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/BCBL92400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e6b0d295495f76142020f13d3cdb819f8be1d40131f124ceade25b19f5e24b. 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/BCBL92400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4442fb9ab316fb7df0d14c76664b674a31e8dedca3b2741ec80e52079c9a1f5a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCBL92400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0379f7befa049bf4077b601ac0ccafea2dd17c73d754c357e37df9c0b81cf121. 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/BCBL92400212.