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 0x72986b32b8e8dc48b3fbd21883ad2a1dc2bd643a60baeaee25063d9d939d4bbf. 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/45151002-f267-46bb-9c35-59e1a6fe86c6.json and https://artists.proofprofile.net/proofs/artist/45151002-f267-46bb-9c35-59e1a6fe86c6.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 0x6e7652a0a171ca91a537c0bcadeb506ac77b4a806c5a83ddb81673ace2d8cf8d. 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/QZK6J2352602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f649145362defa6b5070294fc623f44da89a599919ab204e843d1b69b5e2549. 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/QZK6J2352603.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f306fd14dbce7b3cd11685e114e89ed7adf30e6ed18cf8a0da4e95fac7aab. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/PLC062415654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308dc62e057a4bc0399ba9573e1fbceefff2a14639791df8d0d42dec65d866b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/PLC062412828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e669f95f0d90faf427f8d1c45119f5a376aeaf6aaf47602a50f4e0995427d53. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/PLC062415655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21399ec06c2104254a1c3a5fe664685bb05deb4757ed6ed5c9f79ee3fc54d2b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/PLC062412831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e01dbcbda1becf3d170ec4131293e70e2e3d4ed392f92ef01665a9ad1d5e2e3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:08:42Z), 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/PLC062430156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16c6a6688c5fb8a90e23d8ba58f707dab2257834a3292768f3d71c74231db6c. 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/PLC062553507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f74a7e4de029b8637b89c62f4ed1f65286de3dcc0736bf4498b3cfa4e110a5. 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/PL90S2500035.