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 0x30e2f727fd785c2d1f0f0292468b67552a46080fe1207fe3a1c0f3934e20010b. 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/0e2d00d7-4e63-4841-bca5-7b4630a5e7a2.json and https://artists.proofprofile.net/proofs/artist/0e2d00d7-4e63-4841-bca5-7b4630a5e7a2.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 0x54c6ea3dead8e825fd00087ebca49910d8d147ecb99f0d6381f22ba9c00b5d64. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/ARQ801100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6089258f052a5f0cce4b5628e5aa9271fbea1ad43c87b0fc720193aed9d662. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ARQ801100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebc0ee1d41b5e03880029736ff3102b846bfca9fbe6e42dae5a43a5b942254a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARQ801100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c8e988caf5a93a800bafa2e7e13bdb9ada2a62aec7265e1a4724a1888502e3. 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/ARQ801100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fab0617f9df8541eb06f694588d5d0965da1b41e76e97baa68b9198170798f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ARQ801100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb819102b08f9bddb842203dc6a178cdf00818a060253d78b53edec553fd3c1f1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARCM31400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039f5cda2b040686125c3f85dcb09fc5a4265673e4e4a7e5f059de31414dff7c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:41Z), 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/ARCM31400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87ee667580b0e5b474a180182b6c364584da4fbf4b1b91aa0ac04572d051f03. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:43:18Z), 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/ARCM31400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632f73f9cb3f3ade990cebad09c50d5bd2b57ba92c33db9a0ded9491ca8bf6ee. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ARCM31800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1617ba8d7a33bf4da8da8fe054f04868e7bd240ebc1579840238f515c7844a1c. 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/ARCM31800006.