1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x0ef2857d419afbcb2678a4432e5501f0f2cf844942e905f2ae4016992ce9ef73. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99b6a548-c4e5-44be-9b24-b5de6c00787e.json and https://artists.proofprofile.net/proofs/artist/99b6a548-c4e5-44be-9b24-b5de6c00787e.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 → block OTSBitcoinBlock must exist at that height 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 0x31c1aefc41a55fbfeb4563956a6720bea6262abdd9a5f1739c7f378512022641. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/ES71G1931250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4380714fb92e95d71af27c366a744e97550eea3562343e29d3eb609341dffe28. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:33:41Z), 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/ES71G1931251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67abacc51e27b79005ab7394d9ded91076376934c9e00b3dfef24cc189c6b74e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES71G1931254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba79703356140d545a1152d97a1a5e6377f658ab580be3e0c385c27fec6085c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES71G1931255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd601ed0d3444d7f60b8582adb72c5c3e61139972a472adb25fdd79b32cb6055. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:26Z), 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/ES71G1931259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6115fca210500be3bcfde538752cdf6a6c7e17cfa702831315e5165791456cb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES71G1931260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518c82c46c8cf94ecc6a266469d8d6d9d4d702f0b5fa17d4899bd7e5b05d4d2f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES71G1931264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc3a6fab6e9043ddc34c517990e3c120a7cb1c370e6fec35e6fd79114a1a50b. 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/ARHXW1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78edb9eb40bc0bcb819e8d75b99a7e2003e19b2b8d98d46141c6648a6e524a2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:13:10Z), 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/ARHXW1900031.