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 0xb7f46fc064161b3b387d47fbef0d483c94bbb8bbfafc4ab28252ef919669d668. 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/d94f305d-9090-445a-b1f7-1e31facbf611.json and https://artists.proofprofile.net/proofs/artist/d94f305d-9090-445a-b1f7-1e31facbf611.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 0x55070298fd80376f06c96eb58f0f6da5c1e50e9e3ea33fb5c0185fc50d99367f. 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/JPVI07603420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606017b924c2483480718ad99a0565161301964a8903f0904a572ea42b39499c. 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/JPVI07603480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fe7c119251195d4581d3cd4054477f33dffbb173ad2a2adf999a3d95c9bd28. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/JPVI07603450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb1d5ed4bbdd02ddb05c0502e8f8664fd5eef13f8c76e396c9d287a6b390ebc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPVI07604360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028f648a5986345103e7ce76c69b713676fa43de35a5f7e7aa0efe04c1349881. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPVI07704820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ac7fd3e3d85de868d9ed17eb046ba445d7de55f368a211ee34ca8e2c7864ee. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCJPB1462388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff0761e927bacffe9b26ea13d1c7b95e600f7b7b8d91ae2063b03fe25902c2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPB1462391.
タンブリング・タンブルウィーズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b47b08bec632f5cb3e9ed0708e0d7b146c46bf40541f2986e15008f48d4b1b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCJPB1462392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230a6811a717ee79627b8346da13f131682459f61ec0239a5fedbdd3830e7a51. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCJPB1462394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e76584b116bacb3863dfe7fccb4b4f5081c68bd6a49cfe3f60417fa641b42c3. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCJPB1462397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764fa3a2c57bfd6a635978921a4d7b42c8f2218763a80ef99cd9b696e32bdd25. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCJPB1462400.
<Platinum Best> Billy Vaughn & His Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dddace53edf9845c53f2fb6677f9dfa80a129a7e11c956a95d0ce1eff8f9fa0. 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/USAFM0901089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2b8fc8c2161980f15a7085af027f8ba70804faf9b5ddc5f6b944e4e76f5714. 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/USAFM0901079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daea2fac48bf4a5ce108d40df3796a0b81053168881e68d05c42e57606706b2. 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/USAFM0901103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ce2767ad87f1b644fb8c2b64da678a7c55a48067f7113d525bc8fcb784f8e8. 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/USAFM0901080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8713421f3c3b80d8c0697f12f7bc0beeb3a3e8f332a4b3458ac98df8c53307e0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USAFM0901110.