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 0xe454e3bdfd44a62663efc246beb91e8166f3a482aa33c85870c22c2e5c59a9b1. 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/f74fcbff-23f7-4bff-83de-594bfe7befd8.json and https://artists.proofprofile.net/proofs/artist/f74fcbff-23f7-4bff-83de-594bfe7befd8.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 0x977610d989c97c7ec5584bff0772cd4f09dc5b77f85da94846b8378eba7441ac. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:39Z), 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/BRK341400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf75275164b80d7093bbf4aea7b0f761ae073b2518bdaedfeadced4bd29e6c04. 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/BRK341400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ad754281bb40a3ce89c5b20a0d011b96496f4d18d7aef608377eceebe20a04. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/BRK341400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579da91dc4fb81ed2030359b114b709a0dc4fac668451d542795c93a1728e13d. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/BRK341400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faeb71df629cafd9ecea17a27cfcea2b738d772a4ea5dcc385edf8cc4b2e952. 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/BRK341400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa65b67e6e1c279c7a909365b2aa0bae823a4f552c039163b289c9029ee6449. 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/BXHB51700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5581f8984fd7f003c2fb90981254c6559695c7d8316cb14ffcd6c1a4a650426. 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/BXHB51700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972aedfb16aacd3584cc4fdb3af8ffe7830faa28610c2f7d5c6191a596b2e973. 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/BXHB52100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d75ab9637dface22637ef0515f5123212c160a426ba2898af505b0fbf7fbf66. 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/BRPOU2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b8bc3189bbcbaab316bacbe80cfd7edc7f40178e42194324caa48ebabe8f90. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:08:57Z), 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/BRPOU2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a5d8993088871045bf51988b657989a70c4c3a49155644b62bd6ef213a9e4e. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/BRPOU2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758fe95c4ae4e20d7639bc09cd437b1115310ad2667d87685b75e190c9c8022e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:43:25Z), 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/BRPOU2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b751546f5e7cd60cc589d7368ea8ac2759b5c4629d3c7951ab8e7f19df07c59. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BXHB52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399653b9887e16ed7186a14497179ea8e8e45af9e7d22193205c18677f3a124. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BXHB52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbfa4ff5290091a99395ef0a76ccbe2486b14dc34442d1e76b311eb85d4928f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BXHB52300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7e54eeafc38ca9b0d953302609a5a2a3eafc30b7364f6b9316e17c75cf597f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BXHB52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc97382849ff8bf76c4fa43df96179173104548ff67865b3ac1cc5850d8cf9b. 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/BXHB52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b14db23fcc80ef7baf3d1829e0bc338b7544db1c8838b7915870c118147e599. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BXHB52500012.