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 0xf9447dcb79878ed32eec073f693b127d62827ee973a9e4ff61014ef09d05cd1d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3543baa-1ec2-469c-828c-6ce24f2353ba.json and https://artists.proofprofile.net/proofs/artist/e3543baa-1ec2-469c-828c-6ce24f2353ba.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 0xf500b7312f3504fa9079088c8ce00aa3ada4b973743fb80be1c941eaf1b57435. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:09:50Z), 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/BRUSA1902112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f9bf7a5389156544c459b5e5f5918da4e06aee249c6062baedafd08a4bb2c8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRUSA1902170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3568c4630412eae7efcd9ff8ab05c21f0ab2a5d6c17b1eeaaac6169db150681d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:00:44Z), 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/BRUSA1902172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766983c855bf8039bb1f922d9f7bfed209336144bbce804e3dcbc83f0072bdee. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:26:33Z), 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/BRUSA1902175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0442f448521c0f9c006ce192a52e2013623f6bce761d5c430bf034f0a7de8d25. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRUSA1902179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf28f626da4d35aa03089c4b2b361871e85116997b0e58f66192534d4b0680. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:08Z), 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/BRUSA1902181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56278ce731fea85211feb15a262ff446403b47f7f81b8e03e3849f5b678301. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:07:46Z), 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/BRUSA0401834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a5c625664ac4da6d8b2c0ee804cf527e4e7c916647bbf6c82c77ca782d438. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BRUSA0301535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0499712b0efbe3a76322c9188ee093a1ad0ec044b608edd1c0697df9e1da6fe9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRUSA0401838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c7e5f6b196c20ad1e72954d7b4491286f67944e1e9707c8a56fbf216846625. 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/BRUSA0000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa986b05860f958b69506c9bc806405a8ed051443289a68510e64f24d4198a236. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRUSA0000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef981253861fcecff045a822cee5fae67a39b180b03d61d564e6713cdec096f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:49Z), 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/BRVR11000764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99309b01c08fce5036ed70f45b9015319ed009e6bab2571fd49a5ef0ed3d286. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRVR11000765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f7c033742e3f54f7591428f50d67cd828a9533dc87723293656fa182713b0b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:40:19Z), 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/BRVR11000767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb0fbfe2f9df514ff8ff146d7df6533730e6b569668b4d35109ea696bffe393. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BRVR11000773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8edaae64d234c8488de97f21a6935411521a8706538cff45d03701e3b1319ca. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/BRUSA1700654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92acc51247c3c80fbf6c8d586693674b8b17fbd190fa1412890038b04d367c1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:23:31Z), 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/BRACT1602108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70eb2df2ca52442307c0c795dea6942e2a5a066591c0e54567fa3e257478956. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BRACT1603790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a47305e7c621b70f2084cf9a1dad432799ab2d9cc6186c43dbfe8c50a0d621. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRACT1603022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0d9a73d4098d0506cce3a4d9b91aabbccc950e904fef1117d0685e5bea0d83. 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/BRUSA1700714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda481ca23ad40fcf378e4d0c0b3bf8e79d91ca958828be480157f331f20fa9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRUSA0700919.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b652bcf771a5647ef46145568619e01d0c7d76400e1bfa4cb7ec42ab31826. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BRUSA1702431.