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 0x6156426eda9d4c3213044ea78fbcc2d52dceceeb3965be0a5adc51d772ba3729. 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/547bc63d-467b-4655-a426-e546a84deec8.json and https://artists.proofprofile.net/proofs/artist/547bc63d-467b-4655-a426-e546a84deec8.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 0x6e48bb9ad6bb52e638d61742cb9109ee13a67cb3cf4bb30b4d647014f438a5bc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF602000598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd13e5e6d38b868574e9c0814dee1d9020bcc23096ebe34c0023de77c2d1c60a. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/MXF601400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b0b82e72b34a8b1bf1cf630702fa2a3014ecd8502b3b09d9c3966c3c39b1db. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:12:23Z), 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/MXF601400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e70349ac846d0d7863309d221ef7e49e9b2731aa0c838cdbcb9e5ab88c7a68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF601400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538bc9fc5bb3a7bd6b079a51258483a0a9da2cfbb3980a9fd402ce7deaf176f6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:52Z), 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/MXF601400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7ccbbf4ea1169a798f9196c1914ead9a6193c38183e60b23b9557d2886ce2f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:46Z), 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/MXF601400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf5806bf90ae1c12c304c77efe637594428868da44c95834d1fea8d6c0f562b. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/MXF601400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6f2b4364dbf1679870e89405409726c731a89bbd5ddf985e41fe93d88f87c7. 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/MXF601400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164b202b235cc1be027113d2f879fc82be03a25bb6aea7eb97782b01115ac440. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:29Z), 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/MXF600602323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6addb720c54347f2de34914950ebf963998e4bec5752d2b15f4f9480e269e. 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/MXF600602326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37374e6d0ca1a6004733504c52ce96ee29a5cb4056b4cb216c5c8d92790fb09b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/MXF600602333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac48497bb04c574775ebfd28109553584722810f8085144e9c7d90958cd008e. 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/MXF600700486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3456d056edbf0c3078fcc38774f584611030cd2c08142f2cd1006dc757a26ea. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF602500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc584d19043d9308540f7a2be4a7068526cc423940f3fd1cccddd5734fc48b3. 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/MXF061300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5516ea9593511af9c13fa96788d36f8766d13465ea0eb3c1e57276c10f7d6717. 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/QM6MZ2029211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778debadda0fd183387df66611e9ef3ac76b7ff54918c935f87ca30faf908346. 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/QM6MZ2029236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370f2d7f125cfd598212d481db4bcf0a497fcfb8d38f5c4184ce0b9f9a3dd63. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6MZ2029222.
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 0x32af027bdf8ef39bcd5a6db5301744b93f9ea82e0e75932093e283473fd06c3f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6MZ2029226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a9c4ee8b860b0d5e47edbcf941e733ad73e0a4788cbe0e035c4f95a1bb2f2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM6MZ2035131.