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 0xaafa3b1a1c3b34b075b6db9586ba75a0893c43938334bcc1f57007269d7a7916. 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/d87f8513-fd2e-44a3-806f-afdb873004bb.json and https://artists.proofprofile.net/proofs/artist/d87f8513-fd2e-44a3-806f-afdb873004bb.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 0xd199fe85be4a112aa9ce08628ac0927057240223691f938f2dac1e172634571a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX282045043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddccb4f65efaa02215f0129762379833adcd6494ba75ddab82fe77979b86bebe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2116328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9d76fec1f61df0411d9a36d92a236d7a3ab379d49771da5a140a2bf0e3bb72. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/USA2P2111516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb205ad616796a4d7d757145c5b27aa1b5dd02a5cfb96f9753fb005101efbe0. 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/USA2P2127160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3792a9d6f93fe9a8e78f29e907de445f2d10107cee117f6f1decd6bc68c253d. 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/USA2P2150777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fc2afb99c6ed3a49d5e31a7a08ff9f336044d50dcfff880d9d0da033cc5655. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USA2P2142052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2beef21428f4fbb8a95641069f595b94474f0f1e6c2ffcd1d98ff013d4e295. 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/USA2P2142852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d73c5be7dfd8acd22a208b578fd503221ff3b05e70924687e68737cc54533. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USA2P2142851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada0080b76432302371840a06434bfc79e1b41ae019b73dd261a72a7fb5a538a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2P2142855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc7f20865d66a08d143881f9e5bc8bade54734f28a3e0a2c44e534481484453. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2P2142854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741cafcf3b77ede2d7665d94ca3802ce0a3402f6982b15530d59ed8dc3469abd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA2P2142856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05cac0edf0bc0d243b7ba81c430a9fbb46e8ad456524e2f4b252f923947b28c. 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/USA2P2142853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11de78655c71a6d26c075c5b4c8929d83f2999e2ddef4fdb10d271ec1f731b4f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA2P2216403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b432576ebecdf8d19b20ad4b6b0fe2b9dfd45527700ab5243ebee25f9ce529. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USA2P2229198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b679d808d24f1282c4f0d8097d0883d0a099cf4d363d66815b252d5681edd3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2234378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359673b07d10c9ef326ba4dc98ab69ae5abfc1d4842113c5c9c583c5a7b29c88. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USA2P2301927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92de0330565aa5108ac66c3921bea85096ef0613ff8f0daa4c9645b960c1455. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2335210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d56a26c9ea76c7d7ed43cb0a801a3b70af528993c6a9b8c69d1fdbab17d8b3. 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/USA2P2412875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d56a26c9ea76c7d7ed43cb0a801a3b70af528993c6a9b8c69d1fdbab17d8b3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USA2P2412875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b72d0b63b364b645e5279781ea41417377bc8db815bc33d7ec40d525e7fca2. 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/USA2P2427378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223de18b686ebf3beeb7dc006158198fb05e8bed17bca280e9e1caf40cdad5a2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P2446653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb6f3472799a4d053823d3f9fcccef19e609742ea5a953bef08d27ae11f48a0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USA2P2542825.