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 0x514dfecce065cc26f7f9282e8ff0ea478886e5e330fd6824231d02c6c8f898ec. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f00b990-fa68-4908-83f7-24595bc19dfa.json and https://artists.proofprofile.net/proofs/artist/5f00b990-fa68-4908-83f7-24595bc19dfa.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 0x9e2da11386fb07c80a9c58e6e6f27df3a8033f8eb83a250338553f2d104c8bbd. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZGLM2332774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b371736b9bcc6a1cdea7d2c289bd4861ccba3d0534079c0c076364271c6f5e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:47:16Z), 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/QZTVM2333817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b219b0602270d027d0574142261fe167614bc198ff1ec0f14dc7ba6b66aac12. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9L2364010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32cc8bf502cf1d726f2164bab0d5652f03d8d38739e80b4d342a7d901529895. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZGLM2494772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529a6211f7b74078d68d3cb4ed213bb8610a9f70b74d00c92abdb5b9475238ba. 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/QZNJZ2480382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6343175402edfefc8b1fa1a5d27e8a964ab37fa3d00264cb970b110537ffda. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTVM2433350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26869901630f7dc8eacd1b2300f42c5ecb41b8af862bf8c1353e3c0bf9fcb792. 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/QZTVM2412932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabff308c221e582afe11de6efc0fa6884b5b2299acb375fdc8336674c91fa96c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9M2445126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e9ad47e8cf160a98d74bb5294948bde456b944d9e8e4b530b22796db5149d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US7VG2524256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257e4cef7b710a18f320eeeca1ac7eb1e7d3984810d2ae0cce12c2311bde079b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:14:28Z), 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/US7VG2576879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cffa03ab5b9c834ea171db63127fd4452189eb2964c8e736f62d37d22d6b8e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLM2517485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2037d0650790024363ef8cc3528fed69c66d1b77ce2a0fa808b3f72d6ec4e14a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:19:48Z), 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/QZGLS2510620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa241401132904ddcb06ccc75a873e4f9cc937b3d3ef4bd02e53088b4e27e0c8a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMZ92553772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0f13a3f3b26dfb6dc20d5549823e46fb26abb8cd25369814ab8fd00bac7d3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJW2522117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bc26771f2ed839f38689ce12d8388784c795d1ef90cd2df5628ec9258c1e0c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZNJW2545757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79893944266ce83d03ec3418376a68cc87bbc38046286d5f21662201a712fb3d. 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/QZNJY2557484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928fb655d4099c92a50ac35afd230d9cc29e77af178734b69c52f3f97af22bb5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJZ2587134.