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 0xf3e3f174962432152c5d68b1cdb1aa6800855dafa0e07793481ec3d1a4ef1920. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0460925-59dd-4a78-be5c-15feea5a8b8b.json and https://artists.proofprofile.net/proofs/artist/c0460925-59dd-4a78-be5c-15feea5a8b8b.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 0xbf98e603b58e2e6b291367ffedc75bff08edede8926663739a4c66e813e03150. 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/GXBAV2528283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e829452f6b272e23b8f10f3ccc87b5c78260fe3a53ef9749de86fecda9c3942. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXBAV2576708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3317d4067541302cc4b95b4ffa03071d431f5ca26a242923518797f83611983b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:26Z), 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/GXBAV2547290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2d7c4be9d39e39e8c960d3a2940b39f50ea8131cb69a124d223e9f0fec2294. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:33Z), 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/GXBAV2523272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0367bcda1ca0002ce3769b4e9ad2bd82376d51ff12bf4634e6af59bcdc67ccff. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GXBAV2585282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c04a4e0e2480b3ef6a62009eba0e3a0be89ed3d2e67ef397a5a35c5841d700. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBAV2545032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9459a88edcb9b8e86e79fc7c63ebbe1e27277414a786ad595ce3ebd8d65aa267. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GXBAV2510720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac64a96676b2688ebf4a5dbcff35cd91648d3f0f72bcac7191598089a36b50b1. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GXBAV2512068.