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 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 0x0580326a83d72e55caf64c5aa02a00566f12923fe69c76dffb273f54f928030e. 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/003cc58b-3e86-44bb-9a3d-42a3edfab9be.json and https://artists.proofprofile.net/proofs/artist/003cc58b-3e86-44bb-9a3d-42a3edfab9be.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 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 0xe978c69bc61c219f1c43f987ac4ac4105779a88f81f67eedcc557954426315c9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BGA289300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50a0fa70ff9892e9c2b4b966e4c66f89541ebcde83f0841098a47350465615. 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/BGA289300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d7ed62873256d620de61e566656974ccf23c4ac741ee41c9ce97150f2b2d2d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BGA289300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dfb9fe17526f94f959adfc2e146c6db26f5343d66897d46e46f2904053c656. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BGA289300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec907f903eacd2812c7e424b08d295a1fd933a89452db32137eff2047fe730. 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/BGA289600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b062f7b757aa6b22b701316b2ac22eccb315f599a2dff8b300bf5be0f9270e5. 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/BGA289800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5640e2327cd17c2574bdba2cf813ef62ad6e9b3e3aa4a0c6411065ea4f2f642f. 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/BGA289700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7687cb796815401d1f8274875b3c4d3f9c7f7bae898e9f518d3ae0e4d9976f. 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/BGA289700124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dfb9fe17526f94f959adfc2e146c6db26f5343d66897d46e46f2904053c656. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BGA289300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49a98de097ca28605b91f15b0b824e6931cffe0871c0f3a92b12dd96ae180ac. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BGA289700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cf40785b24945004b460b3c4efb0d9dd0f285cca97d6b96ee719cdd1613910. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BGA289300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50a0fa70ff9892e9c2b4b966e4c66f89541ebcde83f0841098a47350465615. 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/BGA289300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d7ed62873256d620de61e566656974ccf23c4ac741ee41c9ce97150f2b2d2d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BGA289300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9468c1b2e58c27b0b61429f2a174406288a66f9334079f8940c615dc726835b3. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BGA289600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec907f903eacd2812c7e424b08d295a1fd933a89452db32137eff2047fe730. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BGA289600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2967b3d5e1800dc6a4e8255ce85461e8bc5c28710d8ea5d89334a5f5db830b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BGA289700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8a525a7ec99b3e6ffa65e0b1be46d86e6fe04381c010ec6467b01ebaa15290. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BGA289700099.