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 0xbdd4db0cbc97bddc37a6a77de8f9d47aa3256a27dd3907735b23a5c172f9a126. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efcee71b-b049-4fdb-b7f3-931499e65155.json and https://artists.proofprofile.net/proofs/artist/efcee71b-b049-4fdb-b7f3-931499e65155.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 0xe3e0feeaf1d7990ddc560fe07d0567cad50d7f3917862a32e3e8b33b1e651735. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAJY2536498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08270637a47acb3efb8b0f623091aa49a2d5a30f7b76ee0cb2af466ba4707476. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJY2536507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe154e8f3040586c7e9d6d61b06b4a9ed60944a6313b5d37336d5453bad87fa46. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJZ2536517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a7af8a9f9ba73b220da052efa3aeaac683decfdaab9dfb3778b962e84f5ce3. 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/TCAJY2536523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ecdae39ee23d0e61140e1761fe3ad869fcba5f395467f3ae9ef5c3e0f2d72a. 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/TCAJY2536540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f463312172c90dc1cb5bc1f4b8c2f3412e49c6bb030e9a79c695347f77a9f0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:10Z), 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/TCAJZ2536554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec934f582b8ae55ec871057791c558f65aec299252f8e3f07c98bc846d02b4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJY2536565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a7202a091e4dec22b8738c6e42460d51bd470cfb6ae51f43657572bf550d46. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:43:56Z), 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/TCAJY2536582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8b5e9930e9c70db940802d720f7c48b43d7875b6a40fa463f5f275f86dd6e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:37Z), 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/TCAJY2536589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0107a9e84fe11105a6bc39e9c92a6664dd05cbc1ee4b29995795a30cfc17b9. 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/TCAJZ2536597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bec3a59665cfc0e329545edae61e61d28d95ae5599c15d6b0c7cb7d3424dd20. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJY2536616.