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 0xb5e412cc05d3926cc28625ec11671bf03dd41ce340d7d649c434fc615c13aae3. 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/72f9ce15-85f2-4d62-939e-57be22515437.json and https://artists.proofprofile.net/proofs/artist/72f9ce15-85f2-4d62-939e-57be22515437.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 0x306265760214ba16a65e7942dcd1143e2ab77fbb23c0ccd24486d940ba5db6f9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ARIXB2202998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e490f1e611b55f9d9599e69f5e3292d07ea9104f978b8a5930fae51dc972054. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ARIXB2203002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091b7574027158f970f43c057727e6ee2d23a463c5c39f585e290d8835f2ce47. 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/ARIXB2203008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287f01d2831e4966bc61b838fb13cdbc86ed0294017d70d9248a4f350021014c. 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/ARIXB2203009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287f01d2831e4966bc61b838fb13cdbc86ed0294017d70d9248a4f350021014c. 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/ARIXB2203009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306265760214ba16a65e7942dcd1143e2ab77fbb23c0ccd24486d940ba5db6f9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ARIXB2202998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e490f1e611b55f9d9599e69f5e3292d07ea9104f978b8a5930fae51dc972054. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ARIXB2203002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091b7574027158f970f43c057727e6ee2d23a463c5c39f585e290d8835f2ce47. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARIXB2203008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3a962837c74625f37e28564f626f6eedf17eebe922dad497475464c35c1fc9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHQ2383900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3a962837c74625f37e28564f626f6eedf17eebe922dad497475464c35c1fc9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHQ2383900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4fb3ce52e240bec0e015da4c672f11b8515297fd406e3b885f528cfcd39c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1721152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9642f0ed6e0b943b4c9ab112c6fcdd2999270acbf22cb83325a2459db3d6b7b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US7VG1721156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e637c63f99845cc281b5b77945fb4fdbd8e240caddbff1f4fb00cefed494218. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1721167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0340b48cdeaf5b8562e5c3684f6a6abf904572eca35a2f2135feb4fbfda1e07f. 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/TCABW1495561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2195c01c86259fb9735a81c7d5d1bddeda5ae5b433ce2b723bf06094289185. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9N2232091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27a7005a42d8d07a1e7294f31507258ab3080289933af21e536767c71d9c89. 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/QZFYZ2312783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb758a68609d811d9708e21afe7ba157cbc94f4963dbc233d5ca70f17fce46cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6M2348078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41377516308fec797d82c328f87b7beefb2aa1e21b6d56485a85f01995fcbbb9. 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/US7VG1721257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce232be10b6910332d4a9779ac751c1a4f2a18a0a416b2735a50545bb8b5eae. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US7VG1721260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87287b841c47a6ad51a7e16a787c9a3037974fa10447a94bb6d06d87a46181b7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARIXB2106704.