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 0x8e09fd72ecb5448e02241bb75b6476e94324f5ecbe5087778c974a0db3389338. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bcd7d68-984d-4ef5-8113-38b7422607d0.json and https://artists.proofprofile.net/proofs/artist/0bcd7d68-984d-4ef5-8113-38b7422607d0.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 0xf01bd388ea92c57e3ede753ae9e294d7efeccb8e5e169b1005c4922e633e1e09. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GBCFU1000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7729af3481d15c1b56b7c35a923534fa1c59caac55d7201813c26bf81e9c2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBCFU1000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478002a952a4837b8c71eec0ff80f841cc755a6c9faec8d4bd7e25f329997192. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCFU1000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c60f97e4111c1855d91cc0fb5bad06d0f91320562191a971efbecbdac5f43b. 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/GBCFU1000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99631f242b15e9b226c60a6e1e5a7fd4264cd6e79c65d0da14c44fe04f5efa. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBCFU1000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402f4beadccf2c986887cd1dbc956680292d9cec55994419d6713b0bd51b9159. 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/GBCFU1000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f9df2906a1147b00aff0acca9002092957d3cbdcd6e2477c14a3b5025548ba. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAFJ2159500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161af015ddd05958deeaf489da1dd4742dcae57c5c05bb2615e2f80365a6861c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAFJ2159168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82180237ea9539b59e1b38284121dc4903b024094ad88ce3de47497269f39ec. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFJ2159173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627215d834aebacce6f724ff1fbdc9a10590d3886b142585a5dba988078d7aa0. 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/TCAFJ2159184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202b3dc19e1c9e4dbff17ca7dc2a2f71cdb5cae84b3d214c4df5173071bcb4c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFJ2159401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f97e1b8f79be34adc214fd8ab4fc9c5c0df52a2f2947397df8020537c47292. 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/TCAFJ2159457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dc0dd3789990e1509df61de3fa6e8b43ba40e4659097f5e77528591ecbff6b. 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/TCAGZ2359868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9adf8ca8336ee7615100ac82c89175b9828854409af2b294805122e773e392. 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/TCAGZ2359897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4352aaef87626de97c91d9c4a02f2f06799a1fda1c4e9c0dc76433f98570481d. 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/TCAGZ2359903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548f76da4dbad85840a2a171eba37f1cbc9f8d22a83240becaf16e435596a3c4. 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/TCAGZ2359908.