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 0x4f273feaaf8eeef346fd7a67261ea062f4b6850658600439a8036a90c7f1e0fb. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c920cde6-398c-4fc2-a02e-ab0e017b47bf.json and https://artists.proofprofile.net/proofs/artist/c920cde6-398c-4fc2-a02e-ab0e017b47bf.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 0xc7b76813abcad1606f35982e33c66398c9a6d2d63cd0cba4572a9e60fd574416. 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/QZZ8B2554750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02353346b916c630f1655dc24a457669e24c97e012363861c4124a0d881ce211. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:10:32Z), 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/QZZ8B2554759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5defb7843abe26b86cc9abcb705078e14acd9ddd0d2b8be64daed8fb01323284. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ8B2554741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bd6469a8317230e0ac2df4a4753b0a5bc9b5906bbfaff6f8db74e64caef8d4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8B2554742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb4120a595a7adc8039f2f19bfabd42ee16deb6361857fb39bbd970ca7cf282. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:37:24Z), 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/QZZ8B2551623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d60bb36a9c897bcbf7a5add26e12dc5f2615993886a8dc44a8b513cc22dcc60. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8B2551693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76305bc921443885c5c1a294c95d90eed702ca9d74482911e580fe32745fbec5. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:36:37Z), 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/QZZ8B2552051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d44000eb897a049927b7754b13025c86f0f4cfe3682516d2e051c4b7b4b5e44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:21:38Z), 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/QZZ8B2552044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b598e37f1cefc94cdeb9387d332de31bcd02958c78e798356fea923c58f06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ8B2552082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8be5b53ae2ab5f6263aab11dc17bbd9f3c341ae4a33bdbc765b030e04d624a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ8B2552080.