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 0x62f25bf480567c757b0ca923c0532644078731ce8e9bf750eb88087e7cc51f6a. 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/7d7827ae-f057-4501-afcd-3f469fff1770.json and https://artists.proofprofile.net/proofs/artist/7d7827ae-f057-4501-afcd-3f469fff1770.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 0x1d0e5e1dddafacbed7c050ea9aec8100b39bfb945bc19be9007903c401891cb3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMF2004464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3259df77a27ac6718a587202d47d9b11f05d1708c1446b8b325b7da0efa33fa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2117528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658aa99e216c90b4f954ad36a4bae3d50cfccfafac895b84d0b259284c98ef4. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QM4TW2117531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3cd1b7297171ea36233a95c949efa598cbfbe376be3f8cd1263ead11902ac5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2117532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54acdec0f7547877de2d981a70216324e47a7e7e187e19789547b704bb036c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TW2117533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa87368f15502680b11b82fba1631f4aef2b08128b2a53a03ffc2af81104542. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TW2117537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8517d0ff84a5ce01328c553d4ded3e585c02b4b6ef735dc66b4c7d0a18dee6. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:56Z), 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/QM4TW2117529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde483452cebaa0bf5f8a1a0b7ea1fbe50037a519889b65b107bc48d71962bf61. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6P41942796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4107fb264aa9c75d3accf1319c81c662f31eb6d16cfe8c8d9a15f95b3d276c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6P41985219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1f922f7eab69b8b7173f619e513f77be40d9c36ae569c7b099598b0a32c4dd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6P41985221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1f922f7eab69b8b7173f619e513f77be40d9c36ae569c7b099598b0a32c4dd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6P41985221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde483452cebaa0bf5f8a1a0b7ea1fbe50037a519889b65b107bc48d71962bf61. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6P41942796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d4f1c615c23f2e3483e6cfe1fa4d0ab593c8f1d48aa50ed5843d29295c21d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMEU31802950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc053b6aee4b3fc8cee29ee8cb216533836839b96d764662c2c7f93c139e99a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQ0W1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0c6ced5b892cf88da777ef7607891a06c18f910f7bdf016523bc35dcd04c0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CASB12215403.