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 0x0619601fd06886bfb15df932ebd14f210e3b9467879231871236fbeaef57adb2. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f48f661c-c4ad-401d-aab1-5575ed5ca366.json and https://artists.proofprofile.net/proofs/artist/f48f661c-c4ad-401d-aab1-5575ed5ca366.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 0x646f436810c6223d6ae448db96dcf2f0d2c06c878d5cb798c19aa370501be66a. 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/QMBZ92098710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462388cf6449d5c21027f14badf8213faf0ee732f0d1c2bd992485cf112f66d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMBZ92098711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9990f218c24041d3c8320358e2d9ac075bfa74b19b75e77e254bfd06586aac64. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMBZ92098714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eaae55177be14a3907b846eb218e4bca2338b4d89e2811eeb886d25b2e9484. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMBZ92098717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bb3e35a6dc20c570e3570b225271e97ce0018e40ee20523aec3569a4ee79fc. 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/QMBZ92098718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfb8807f8a0b77418aa844cb092c82ddd1e8601c8391a9336d9abf4777ef1d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42223616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10d49a1dc0373f2ca1c531677615ab4d7f1d84a7190fcac9d19837356c3725c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P42223617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c4308ecf2083211f5c04b3f7203a50c478395b91853da8b371af12281b0093. 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/QM6P42223618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a449604374a1cc45a13702a9100302ec6288dd0f9031b85cf0e24a6ee7e70a. 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/QM4TX2450865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1714ab6ce43a909ca4d46805c77c1f989a638b0ce7f53d2623ff209d0430077. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TX2450863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207a3fd6f9a187471ed11a368719fb4274053aedbc13ed8efd849231838b006b. 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/QM4TX2450864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1804b862a4a25a439659e1717ecedd2a9925c0fdd5b53fa07402eeddd402773. 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/QM4TX2450866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbf999658a90b57481570e3ff333939fc57a0b693f9573d81b30f838e2d63a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TX2450867.