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 0xe855d285189c1db6ae945aac5fb8f3522dd37a25341eff3cb54f695519fe7896. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03f4fb85-9df3-41f5-bb02-2ab6a2499bad.json and https://artists.proofprofile.net/proofs/artist/03f4fb85-9df3-41f5-bb02-2ab6a2499bad.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 0x5f93fe23b07d1c7489b7250fc0ef0c40e271b99662f83ada2b56d151779a198e. 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/QM6P42099351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea23d8d4180c8cac36780f0651d6feca28e3c5a26ba3899100a0a0c828cfbb3. 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/QMFME2383052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef1b6f6b5406714a941df295c0d10cbcab2f1d998adcdbe4556693afddf9e82. 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/QMDA62319366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117ef24676c0a1a0c35779537959d1c068d3d738777c0552e0c34dde23862d3a. 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/QMFME2383054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feff43aa8053117e9fd01a1778f3cce89bc091e36386c4cff8ff71455d39222. 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/QMFME2303351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca2464da7d1755245abddfe59e9ca12fefb0974f0a16f771757a91e2abcd25d. 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/QMFME2383056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbcaf162c4e778706979506d3a4d29e83f98531484544e5cd9b03f0ce5bf2d. 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/QMFME2383057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463715f6735e08da6c86d3738da75b84798e417c9a3f9cf7d8da552400cbed1c. 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/QMFME2383051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e32f6831608f58c589b840e57b1b0e09014de339d68fa1ff60a4161de8ef47. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMFME2383036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88154878ee809681545f8e60113a83cf242717bf87278a0924b876a8677e1a0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFME2383058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcf75729f4b67343f495b1766f73f3158861fabf56c5f6ed5b7b439e28a28f9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMFME2383059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2251926c3e5ab8e56a996b211ad95d4a4e926f9302fa6bae417ffeb6efe03f0. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QMFME2383060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb329141a65f9a0f6165dd3b25b65d1e050d763932c5547c05217069eb1cfe470. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6N22116533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f93fe23b07d1c7489b7250fc0ef0c40e271b99662f83ada2b56d151779a198e. 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/QM6P42099351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f5f988a25e0f7c9d829b9026746de6fe0f551583a50ff6da110b0b652fa212. 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/QMDA72166327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754338d09ada09f441db68d65c7152b7abe0826a511ccdd419dad3cf9f61d4ab. 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/QMDA72166326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21802d4a891e9d77a3591d1442a40c64161a98f20335134507939b4d21db2184. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMDA72166307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a01e93443e53aa377f1643fd8d5af289aaa522ab7e443bea6341026d6608c8. 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/QMBZ92182267.