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 0x9ccb9b5cee7952e6e33f943fd68c79775b41bbd2a4d74681539c05226c0ca603. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5aac0b1-0333-422a-bbc5-585d17dba00f.json and https://artists.proofprofile.net/proofs/artist/f5aac0b1-0333-422a-bbc5-585d17dba00f.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 0xf0a1ebcfdf7985763cbbb35f4d64d4b8de79958e6ffdd9264f9ebec14c06426a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLA552400621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde8476af3f5069c9b0d5f06d779b7119e2b316ea077e35e3b3d843c6c30bef. 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/PLA552400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343e9c89c15753ba07e436748da27529474073bd1fddd2228c2c2bf0c2a0d439. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLA552400637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019b4cd1855ff6d77c679d907462a425facafdd3d318a8aedce460fba8136c45. 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/PLA552400648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b61e4ec69d7d3d27e3ec4c89b28a186a2fb91e2c8aed43221c2f6fbe54418d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLA552400649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b8410d57febd7c93df7cbc88a7d814b7d3ce3a49e49b58b335c09da4ed75d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLA552400650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3593d6d2a04d6e7067abe831b09636a99bb7afa91f0071110335ca09a32f7971. 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/PLA552400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438245d8725277151a3797e9c0f0605c3e0ee224385cb2a6081df7d1350439ac. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PLA552400652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840797ca7ea1fd8ae40099e3ce7408385d70b4931069bd3e6b586215399e833b. 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/PLA552400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3336364be199bfe4845d39dd684478e94bc5db63328d6e81e068694891631d. 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/PLA552400654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e9d0d9f26300b6c57ce5a2e795d5c13e9e395382decf33cfdf93c71e8a6d58. 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/PLA552400642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce4826c43722c60b7702958279dc1c5e30bd518503f26fb63d3a20eed1bf155. 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/PLA552400655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2dac29faf0a7413bf9d36c55a05847e02d65ed3152e11c4f4d936ab4cfd106. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLA552400636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc572e897b0d5cd56137f93b504ef5b5c167eccc5760cc3b8b38c9f724f0516e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:28Z), 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/PLA552400656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2dac29faf0a7413bf9d36c55a05847e02d65ed3152e11c4f4d936ab4cfd106. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552400636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb14d653df570c501a9a45d8a70ece77ea5c45e40e88a3a1d05170a6b899b61. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/PLC062415652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf031003476890d2f0e26379efa523da39812efc89cf0f9b27cf24a60e4789bdc. 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/PLC062415653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555930a7189b0bd6dd2b9220721d04de007585722b5aa598019c3d0446f3f844. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52497893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8b21612c8371bc26c84641eab8e3a4cb7a4704116a2b3678e588cbc92da356. 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/PLC062415656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73443cec8059fde6b52ac2ff031e710fd9e9d29eeb57e38629a2981a85a14366. 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/PLC062415657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dad2a7f15f0962508275a63468d78e6e4104d5d837d8facbb2602563621098. 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/PLC062410977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4094a49009c6c2224ca5e8de88dd807047f6a24cd80fff4dcc6b3eb2f804b8. 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/PLC062415659.