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 0x0615846a0bf8a6b503ba6125f45042177d36187c7fc324d410894eed38fc2817. 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/fede1886-7539-44e2-b22a-15547fb931b1.json and https://artists.proofprofile.net/proofs/artist/fede1886-7539-44e2-b22a-15547fb931b1.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 0xf2b3a851a9f73c79f897db244e7513d204ed5b4f3116f7d15f2e328a3e4fd55d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM20755049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48704eec1cc819fe458d7d3c50f5d21839f5f5b2e6e971938efc4dd61bd50efa. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USHM20755054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a2eec225ba0f5bde969e9cd6ca21c92cc6af7ed239b5facff05c0ddff7a7e0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:24:32Z), 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/USHM20755057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021453eedd9b20dd9d647307c3e4e4d21b1952d65678126b08ceec1996b3b3c8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:44Z), 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/USHM20772815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14895391eed592debd1b80b98f6955a1bd9a5627a88ee0ffff6760d8ac04a13e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM20772822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566f9f2f7dfbab66ea792bceb446c54e47b922e085f54b4cc56c3702834e69a0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:12Z), 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/USCGJ0588562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5111d8c258a458faf6d0fa66f89dcb14e923d322a5f63820c325fe3ca99feed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ0588564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65edc81b125e4c79b3ffa979af9123a0ef4d9e074dab1dd37584a79097a32726. 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/USCGJ0588565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666307306068c19732c2e96ce34efd3f086242cb9bd29c6ab8a9823192046046. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ0588566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f147b1eb00330869f54fcc7345761c013b6331b254da18eeb724151f84ca92b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH1969358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82fb2dff8d1701b3fc8b3890fbb9ba5342aa5c86fb1e9c4d3acbc00f900551b. 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/USCGH1969359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c7e557d09fc9edb9fe2fdd1cfda1e1829c797d61422ef626492cfd8be19b8a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USCGH1969360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa546d20ed92b5ce55fa02a524f0b59586e423ece81553126f31a9d5d75ddc884. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH1969362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c07175f227a6c7d245c45e2072597b0c00c3dd3364458811f07e4c24789139b. 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/USCGH1969366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf111727e773983db6d63773a2c0a5df47c75782b6f9394ce5877dbc26a23ac85. 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/USCGJ2206999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5166a7bcaf662382c2c528c21412333eeaf501183657ace777c5995eb5846e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZDA52405058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecea523a346210a22738f467bec5efd019e3ef3210738867e91f9248dd2b9dc3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:04Z), 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/QZTB32582224.