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 0xeb37e90f1183c9a982cef12eb7ab095ea8478b197aec6b4f392b06785efde688. 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/233029fd-c5d1-48cc-a71a-b3cc6743cb37.json and https://artists.proofprofile.net/proofs/artist/233029fd-c5d1-48cc-a71a-b3cc6743cb37.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 0x65531aa27b71605435662da2d31ce76af72ba40c9e196a99d4113eab215c1f43. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA2P2308588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87241912afdff23c57549f0625844b556f22d2a850b294089df77bc4c500834f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA2P2313673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65531aa27b71605435662da2d31ce76af72ba40c9e196a99d4113eab215c1f43. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P2308588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975c686045ebeb04f8bdb8df2fbc8f062b16f4431754bfc07354e99142be833c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P2336772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf62574ea81bcd899783555fc0d3d7bd44ca9a640b7d09c04b44cae7bb6a485e. 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/USA2P2344328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0459221ee53d249e5ae359447ee5698c8151a9c7a70a13973ad538bcc3ff2a5. 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/USA2P2400914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864307187fbb407a4b4acae56a17de3261c92fa70ca34128efe877ee77cbe4a1. 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/USA2P2422942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0459221ee53d249e5ae359447ee5698c8151a9c7a70a13973ad538bcc3ff2a5. 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/USA2P2400914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f60f49057b57e9c91f0a3263efbb222e62d05efe520cbebac607575c5d8d87d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2441810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1f5fd70f51e77f8ab31ee0f4c59f112a57f91f69949e5b6a031cc000ccc982. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:08:08Z), 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/USA2P2441811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd760cc6a6c2e59eeec35031903de902724d206e471b869d83ce7e31157302ef3. 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/USA2P2441812.