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 0x45290d64e7bfd35e23342fcbc6fa282ff5b125c9c7ffad77bf92a1982de2a7ea. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ad6d1e6-f0d1-4a07-94c1-217006ddcdda.json and https://artists.proofprofile.net/proofs/artist/3ad6d1e6-f0d1-4a07-94c1-217006ddcdda.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 0x20e2a9132dbb31d93644472b6f2e01449de41f25e8e44999c979e43e3956e23f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2522921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e36df44bdc9d9888471a52eebbf716e89c2a19a69ba86b44976cbec98874ad. 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/QZK6H2521840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96582c8dbb5a9979693db1098b6a9ca54d63267bb28be9bde4bd8a48c4e461f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6H2559718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ac96ab17928279f9cf60fd5b60d8f837330b763fb5492f70c251a5f72613ac. 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/QZMEM2571048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eb95e227ffbbbeaf4c93b6e5afc4e1da872c573cfe6f2aab40a9a496a2c248. 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/QZMEN2578688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb85b893b258ca7ba706bdd9e7252ddf4e66dc2c826545490bfc005b74b68a3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:59:47Z), 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/QZNWS2592381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033488bb9b86353c95a9a9c4315a561999455867168858375d37062baf7bf7cd. 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/QZNWZ2546617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf997ac8f05a087cb3518f95dac45321477eb8b62507fa78ff4d10ae199c0cdf4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2546618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7970c376456a6baea9b5976477c6be359141acd9a0eacb93046452b00b35789d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZRP42552734.