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 0x3a248c0f2b6391a1e61ab8d59359f7c0664b859a86ff78230ff81c193f608efc. 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/45754efc-580a-46cd-b11b-fa89b22ad0fa.json and https://artists.proofprofile.net/proofs/artist/45754efc-580a-46cd-b11b-fa89b22ad0fa.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 0x7cd12f276ddb663e979c43127a4e437566dd86d26d4317cf1a239abfe34aa228. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US3DF1840647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750f923c14723e75ef7f487237fe53acfa4ee319c66103121b4f6bb2a1994a2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:07Z), 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/US3DF1840649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd54bedc313ef1674ecadf25645a067810173c194a80178d2c5c6a104780ea7c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF1840580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3446bd902cf1f44b34a6d5bd1cb7d8554798ef057ef4c19aa846a2e115416dbb. 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/US3DF1840583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdf71d813ed6b91a9b7fc7e082b67a0136aae31ff0fa8c6b0615d8f912527d3. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US3DF1840563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626f609ac307ec285fbe1e6e0b68c2d47fbe374658b9ca55e00d7527c168f1bb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF1840661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3b940301e81d28f1af2a226a53a4f2d39a0a4a482151a69d330015235bad29. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF1840663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc8149af65b05e5fa5602ad2eb7e032ff1c317d64f6cc8e75ca22253a8988a8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US3DF1840668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3729fce3753635e8e7424999beee997d49ee706eb5eb6f3dba90ae8cb405b702. 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/US3DF1957869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67d09e785ac50870dfcf1c52c38b45064839fa8b60b65990cf6b2735c6279a7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US3DF1957870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5950599bf7ea0f44ddc65a69efa48e126c13366d2a5703ff20f5478080c885cf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1957879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0589087680e9c1201e7a7cc63ad788d44ce2d8ffbaa8eedac059a9205700273. 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/USANG2008223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb272caf76f4789c469ed9d2d28ee0e4ceeceec3d05c3935d93601333eaed3349. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USANG2008226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653d4d0f8f061c5604cac0190f11338d1bdb7163b2ed4430e0dbf2f06580b7cc. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CA5KR2021097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348924ab21c30889447b571297151c7decccd5d6a59c14e7f9c17d3781212130. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2021102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80625009db6b8ef05471592f87f27737eb80c9396afc3e41cd33ccb6ab9eadbc. 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/CA5KR2021103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f940ae6296600c7e03e3b899c13627371aeff53c27c42a53f255e8cb847622. 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/CA5KR2021104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eab03181b76005b1eee3cf086bc123531bea82655e7d38ee7a764bd38ad70e. 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/CA5KR2021106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995f1ca690c038a7c1c93e2ce6a59e8b508c17e19284198d9b5ed9766ff52d5f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:45:01Z), 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/CA5KR2021101.
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 0xaa58ea0f01bb1fcbd10f6899cb17a79fed09c0e7817e02082e58598bbd889bee. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CA5KR2021094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d34e07c654a127c8af16e932090295d2675489b80f5a70f57b990b42932dde. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA5KR2021095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d9b8d9b82f742b0210309e100d5b488cca224dcf533154d8dd6bbd5424cbd5. 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/CA5KR2021096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da9cd9baa5a248634cbb8df55a13fb8b159ea60ac77e41185e832def5a62140. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CA5KR2021098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f4745449595d392ed5922b1556f6c26f82ed3085e904f9318a7556e090418. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CA5KR2021100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cff714f6187d065b68a71c4055f83d1bc040c22fa76cc397ca8a584f4679eb. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/CA5KR2021109.