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 0x6880f18b6d20575c130fe1301f1f549dfbd84d937fdc8e509b577e4ef96e2e1a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/293d9be1-0a34-4e37-a399-956e25e8783d.json and https://artists.proofprofile.net/proofs/artist/293d9be1-0a34-4e37-a399-956e25e8783d.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 0x391c1cbc29d88b0a10852275a77e20162bda7cc8cbc7f4251bb56eb48123ec2c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZS642345331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985e4849443580f338885e83c8c2ad1a3221db3e51152d0bf75121c4d4747149. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZMHM2314396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7316a5eb86d4ba33f55924b4a87179966f6846d974971b79f27fa666f9bcae80. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZWFE2318804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d95ef790e3a58cf21a4d21f9be0048e16356e7eddbda74799872b0c0949efe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAU2496867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9b8c0b8bd506f96d229165197f138adf3d5ef4b621bd4e03aa9be6ed0b7f2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFT2463277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6feff75a226f7812e951f2610b361a8d6f8a73e0d635409d8de050343071d5a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZZ782484781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65428248c11e995450e7583e80538c4e0388a52c0a4c02680bdf6253d6f598df. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:11:05Z), 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/QZZ782484782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b728ed36b81458e78efc6cfb2fe979adb0cc603ea7c0e560bbee939e00378d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZZ782484783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5ceca56db1550037b8dfcbc77913a8b941bb5d82eaaa93be29ed79437d2617. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZZ782484784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcee8024f489c856bb9bdf6b5c02c070e497b5313517ae52a6c8739cc31bc29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6G2351464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa648ca6bfa4a6a129a16a3b9cf39fc8dd2e2a9e0a725ec7e29fb20c00c6c9d90. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ782484786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72efd2f0b1d96129579ee466829f0fa125db4ea847ee9dd56f43730a13efc3ec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92547235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5b243c39b6b0e38dc89d4de7d37690ab27bb2a2e2a74ac6fdd10ddfe42040. 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/QZWFM2406223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bc14c5e60c01c870265ce400598c6ac7a258ae6fad183852251f7a7793b364. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES92587102.