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 0x7302ecee37297dde3088f4186ece3cb2113c7004fdb6fdf894752c3178a5a103. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a144fd5-1184-403b-8031-7ba02b1dcd35.json and https://artists.proofprofile.net/proofs/artist/4a144fd5-1184-403b-8031-7ba02b1dcd35.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 0x883802e0d8f70ca8b484e8bdd3f513fc9ed3a9adf4b1b5bc66467eeaad28178c. 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/QZNWU2269624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278fff401ef48939a363c97d8887569e0ea7704324bf791282b4ea597a94046e. 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/QZNWU2269625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34703338240dc5c40c6b4a17206733dc77144e385f8b06bf20bf940fee1eb63. 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/QZNWU2269628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0278a008bbbe12df974091615a6dcc476107612d7df27e9a1b057e6f6161f. 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/QZNWU2269629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298a020468792bdb982739cf6830396805e325fba81789148229f20fbb8b60c4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWU2269631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64eb52f3a37b228ab58b9845cab0268e81b9f0cfc0ee87d5068b458cf2c8369. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNWU2269621.
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 0x4113deee5f9b127b63234e867a226db92fcc12287c1622da059bfb14b7f0f7ab. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWU2269622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e2f0c134f18efc2d0829aa60c30ee94d059a8cd5195eef7e96ba3f9183be5f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWU2269623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e38539995cd2b22c9299a48557d416c2cb7ab34f91de6c62a6c1298d847202c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZNWU2269627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fe290321c979bda57ec36461ca2324567e425be7818d21d9083a1c641949bd. 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/QZNWU2269630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98218e8b6b5a02020cbbd0241ddce46eb2e716a2be9e0797d7011a8605671fa5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWU2269632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc79c709969ef019ca873e2c8f70f324112f3dfa6ea4f79a779f9e78fff9bd. 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/QZDA82047554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57ae3514fbdad4945689a053ef8dcb852ecb3e44b8f40bca2ac6c466e9e9ef1. 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/QZDA82047555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ed40ae2771250971589ac483932b106d4969c11b8b7aa8dddba05c5db9c31. 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/QZDA82047558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa3a9bcb59432e2771680520cd0c9e962305fa44d9a80549ecdb17e96167a0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZDA82047561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2426db056cb444a8809f8a67c3fda259b6169ea44ad91fb3760eaa390e3d3ff4. 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/QZDA82047563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188d25c7386c48d0de606350cf9ce7ee131d341a6ca7220fc2d05e1c96af0fe0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZDA82047556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd28af958c379bf3005376fb51351a1cd6881f87f878a2efb2f15b86b45310c. 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/QZDA82047557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fef4ba81cf109b69c27944e66c31f6a5895d7bdd2645bfd5ab524beb77f5fb. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZDA82047559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24ca9f83defeb8760f8d695254121894903f9624dfa8a57fee79a3aa75b0848. 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/QZDA82047560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbad57b3cdfc2891a595154ec7e05a4df401cd3130031fbff975e9d3b1b02aac. 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/QZDA82047562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068fa2007500020e0e7aa9cef29ad0851d464a1f0b3304c27744f01d50f49ead. 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/QZTAT2234158.