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 0x83b0a13a80be75185937c7b2ba2fc4615939392da86541eb2384ba36918c2801. 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/5081aaeb-7166-4ff4-8fc4-67527d0e9cee.json and https://artists.proofprofile.net/proofs/artist/5081aaeb-7166-4ff4-8fc4-67527d0e9cee.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 0x16506ad834c5cceeae57cba71e0e5e7007f019c0953ddf61e1ac3eb4e6716fe1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGWX2236427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960a8ed320ac1e73524c596ae166ee37f0dcfce5929deac580418c4702214636. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZGWX2236429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6458abaffda13807ceaa077f0c56012ce7cce3d343b69a504b1ff8494ad3883d. 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/QZGWX2247257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945efca9b812cb471fad0941cc06e2ebe16df58d09d712c309167e618a468f80. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPJ32128281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e27003e1b5bafa4face3f369ac170a210b87bc1489d66955dbe4a31c1a2f829. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPJ32128282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8497a9e49ac9d2703b347f102b757e4989e05455cf596c26b02a171dba200961. 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/QZPJ32128284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc340c462fd90402fe0b3f5e80b75be15b79fffd47e42c46bcd019790153ab. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZPJ32128287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd229d311279df8a0f46e394cfbfaa5d424e6c1231413cf6d3765c6c078e4430f. 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/QZPJ32128289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9879523a5d25883d9700f5d53fcccba62d50b09d06b915c32c6df41dd29bd39. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:09Z), 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/QZPJ32128290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd6c1714d1d591ae7f9e4452c5c17593857b6592400a9bbde1751394f3dc60f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPJ32128292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da56ea7232a06eb6bbcb540148c3feba65efae79b350354725f19e7c3c2236b. 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/QZPJ32222803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03028466b2ba9aeb2a12e76243e603233fe856e97eaa1c3451dc7b85ecb07c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:49Z), 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/QZPJ32222802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f306042844cfb6629916d346495b04de09eb66547bfc08d136c25b35107cb7. 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/QZPJ32222804.