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 0xbed973995aef40c428b0c611c48fbfa438e3d3ffab8fc007d02fdeb2e649b1bd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/480a8c9d-b0bd-476d-9ba1-0c77f4152013.json and https://artists.proofprofile.net/proofs/artist/480a8c9d-b0bd-476d-9ba1-0c77f4152013.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 0xd966579e062d91c9d1e1ce86f78b8e5223a4f0119f49a103ffcfbc9c33107eb3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN62556039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd966579e062d91c9d1e1ce86f78b8e5223a4f0119f49a103ffcfbc9c33107eb3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN62556039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e44df419a2cca65bead6971aa6c488f639df8bf6f9dd695d0d303ad0a5296e2. 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/QZK6N2578890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc597722da6bc5f26819cb6bb7dee196fc9676f6341d811f47af066ea6642554. 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/QZHN62556040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd966579e062d91c9d1e1ce86f78b8e5223a4f0119f49a103ffcfbc9c33107eb3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:52:54Z), 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/QZHN62556039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc597722da6bc5f26819cb6bb7dee196fc9676f6341d811f47af066ea6642554. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN62556040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e44df419a2cca65bead6971aa6c488f639df8bf6f9dd695d0d303ad0a5296e2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:50:47Z), 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/QZK6N2578890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62883eeef7f422ec33bbef875363122d5d486a67ff399ef40a9cfec184a9fa70. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6L2534209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd27c546221c577d7de9d19d048c8db3e4a2058988e63206010e46ec52c592d. 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/QZHNB2565720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f75ef917009e8adcfe7b404426f2fe462be863af013c3f6d950e5c10b845520. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:30:18Z), 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/QZK6M2595352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2657792a49a2d23ab00474ad9b8740529651464a9526825f109aa7b72e6019f9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6M2595353.