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 0xa73268d678ac2368618127db99ee6fc8aaa5afd8cb3d7fdbed612bfd383ff0b8. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/823a951b-9787-422c-ac60-5e57f2b7b554.json and https://artists.proofprofile.net/proofs/artist/823a951b-9787-422c-ac60-5e57f2b7b554.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 0x42bcd3c05cd1172691d3df82753d53db2384e3aae67b47e070f28c83dda87e35. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GB2HB0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6116f62c9a3b4226d7a55020521a31868a431f37e35682933e1283e030657d9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GB2HB0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89669045f6ecdef5db25383478d10521a8de47d0797145dca757915b2bdd5680. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBJX31840017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313ab8fe5bf3e3c47a79679c0d9acd0df5a5944ce373fd60c8f6dd60550cbd2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBJX31840020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd2850bf526068425dbfdd593c9d1b0707e8029525dcd998de67d47802bc977. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBJX31840024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07927b364ac7d4941fd11d6b54dfea22548a01ec4d8ed876493b2baa8255b7b6. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GB3H32000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddbc186ea0219de1514240bcde168cb5bb5a0fd2f9a150f0ae1455304de2264. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBZPZ0600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454010f15765966676fde9ba08594743989ed3606116ba17b5af96b4fabbd05b. 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/GBSZM1300246.
Reflections (feat. dBridge, Instra:mental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98d168c370f3d509f7e48e6897121b08ee6a81aa6d10d88a3d599280f17f71. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBQGW1010012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454010f15765966676fde9ba08594743989ed3606116ba17b5af96b4fabbd05b. 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/GBSZM1300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4e8fd8f60286d8003affb6482f4a4240dc4db6929e529a6fb78ba9f0475a23. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBEXH1900321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d76b1ac39326e57a0ac4e09b283dfdc7d1c28c3d2b660ea1e8ffe4eaa31e7ff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2P1894349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0239975b0dfa9170b03684b076ce669b8baab265fa3852c87625ebde4fe32899. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBZPZ0800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4e8fd8f60286d8003affb6482f4a4240dc4db6929e529a6fb78ba9f0475a23. 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/GBEXH1900321.