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 0x33f42edcbcb909bb2fa8fdd4142fd5ca1e8950b43ab81fbe697ffaa6092d9cee. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbcfab1f-1b51-42e1-bd34-b762f48450d9.json and https://artists.proofprofile.net/proofs/artist/fbcfab1f-1b51-42e1-bd34-b762f48450d9.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 0x298dc9c0ed23dd4ef41386153cceba427174e05364a8e19c002c7fc7849640bc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:52:06Z), 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/QT3FD2581389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92dfd398a5621b79432619735bd421db3805628282f1527253d4e6100cd6d2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT3FE2579274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4244f44f64ddf743e9eb908aabea05e0ff3c7b016913121bbcd1e0186923883. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FE2579273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62766198a052ea8e868df113d79841efc79889da9f627a8d9f894a0d7a07a80b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3FE2579269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad102e08c5d909e8a5e4743fc0ebad80bac91987d6427942744596f40da77cf9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3FE2579277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5c1ebbf7cc4ac7a031db7f9fce8bdb41cadaa5dc42e5ab2b63210d9164dfbd. 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/QT3FE2579250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f817be659e50f18292008c5d5f3cc6bdd266102f944d291db2b7e99818585. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:33:57Z), 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/QT3FF2575954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffab11be7b3bb3d64fce457a7d9a08aca53722998ae84f9aef4bf08a91430315. 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/QT3FF2575955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38bf0a912221327c42fef8ee2aef6d371f33fc6750eae0aeac478f3742b7e35. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:46Z), 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/QT3FF2575960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2b6f62b6a99d859aff9f1ff63883696b0c099689aefdd450266e71015d942c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US5UL1342303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c34c0ce1484938794f6277ab4f221e21ca1236da3a58f22a91445c15ac87f8. 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/US5UL1438711.
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