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 0x5601351056b42a3f5ba0f8465a9ae7285a82c1e33116801aefff269e1879fb05. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b68b0de-8fee-44b7-83d9-a500e7c4cd02.json and https://artists.proofprofile.net/proofs/artist/1b68b0de-8fee-44b7-83d9-a500e7c4cd02.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 0x7af0701898097a3a806aee3aff4308b6a262fc2d2e3cbb8bd8ad36a779090a55. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/CAHQJ2595486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d702588f1b81b9b25235b47afb93779a7bbc89d146317bb434e81b001b4025. 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/CACWV2507414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0b8cadcc15d26b470f9418f4666cb1bcee50f95c24484012580db23d07a57. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7R2519088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98cbc9eb43631431da5767f6abac0c7547ea338cf0e9a6a48ce5624922a11a3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/CACWV2521919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee09258e95c733af81033da46806b3dd7bb1e2ff6064926305281b028f8e39ce. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/CACWV2544912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d780ebd1d6b57d2a6fe88f5d2e8bdc639cc7d242979a7cf49c1bc3f0a08ce. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CACWV2560215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c031d196fd662f41c1f4b519544ec0a742cf84dda246378af48d2093deaccc4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:28:01Z), 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/CACWV2573526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa090b84ef2d3fe24da5689ee08ba01b82476db0f5f898d63289ad33bf476e1c0. 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/CACWV2587196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9507b85375ee5a9926b503212961e672c52a1d21015fff0735c562bfd4b54f34. 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/CACWV2567259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf512395f9558dabefaa3c1f58d3df23a80707cfe5f9958d474c2ad01e6a314c3. 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/CAENV2510055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31180fc27682a7b75599cd4fd4a1ce5bc65dc61f0d7e8175c09e0bd25ccb532f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAENV2584028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467d9a6e6acf0ca8182bdb62a7bf6c09176c5beb298e64acbba3d60cf3ee784. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:19Z), 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/CAGOO2543413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705126155f74904570abb1876e6283458be5dcf092859e602bd620caec014bc5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CAGOO2543412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e5af68567686c5f4acba1d23fb0a040a9ca50128d96b5e3c2c00c64ade6098. 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/QZTB42567787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a369aa6c0926274b16ed85b5f377bfe4a6253f407646d5a1f69f1a6c1bfc15d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBD2598200.