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 0x5eb1a5dce78b5452e00b07faa3715efcc876823c488cee9cc8ff2529d18be479. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2ad9ec5-d8bf-43ed-8c53-adc04400c8e1.json and https://artists.proofprofile.net/proofs/artist/d2ad9ec5-d8bf-43ed-8c53-adc04400c8e1.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 0xbef7087456aa75275dda9f95a7ab9a7fe348b007ce67f0978f3c336c05b3b3a7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:22:16Z), 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/TCAJD2462497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f9bed14d65bee3d3ecf6becb2268421e2907c1008bce6d7ad0014a9b4333e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCAJD2462501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507b5d1a1fe8232259e130b17c88375d56035f49b0cf16bdc0bf0805916e40b8. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJD2462503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90062b1784ce138243450c033ddc8ae8bc303dc6cb9f0eee42202a268192086f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:40Z), 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/TCAJE2462504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d690fad9765ffa617e079d3dbf70e12a3ed46bcefc636e10514f66edb644b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAJD2462508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2821e9370a60996caa33ca7957f5d9f8185845d6a69f2ee5e1e5487e85ad447. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:58:22Z), 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/TCAJE2462510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72a8d374551a20be2ad12977e1496b1be31cc8ccbb9c1dc9d39d6fefa9f0309. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:06:41Z), 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/TCAJE2462513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd870503186905e02361c10015b72c1373d8fe0214f0635962c1dcebda1934ae8. 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/TCAJD2462517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a43e05b9f495ead4a54ed93e6c7fbb6c3cf46f9c7f4ca307c35234379af628. 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/TCAJD2462520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef283d742aae573f3e3c87b4b4077845fb3d58bde0aa8270758d6bb67d53b363. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJD2462525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f81d6d7fe806c8afc57907f37dad5dbb895c0fb8d9480ddfaec18225e4ce2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAJD2462532.