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 0xd46c646610227925eb2a41a57985d99f1feac7baa07315e536787f66b330f93c. 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/0bc06741-210c-4cff-a58f-59934565ba59.json and https://artists.proofprofile.net/proofs/artist/0bc06741-210c-4cff-a58f-59934565ba59.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 0xe670627fc08123197369b80fe6416bb4a99002785a8f245d5ce7265267490115. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5BU2023894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa353defd5497923372b2c9e4955eeeb7d1b50aac3a8ff810b722641095938a99. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SE5BU2023895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc6ec64e04f41f94bf9ce12cf854576e9eef9391f2ab74b03442a31ce412d2a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SE5BU2023897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e549b543b9e1da38a01d38fa973606dbe41abc0eb021c6a0a0cfe7a52562e25. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/SE5BU2023898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22dc7a1960f13e133b3dd34475b1ae990697321ea50cd94ee50ef473d8ec735. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5BU2023900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebfd112472ee74d56d52c68d0213408dafadb48ea53c788b18b9d9b49c010d4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5BU2023901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96583a7c0b1e287eecbb0f11532b0995d5facb7810e252f6b41046b2c323dae0. 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/SE5BU2023902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49ffdf57f1848e4dc5716b222105a2f61e92e243ead55963e9173b2a0a63d3e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SE5BU2023903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61889554cc3102c99306c1afca8d7c7b8e03e4c2017756083c8b3dbdaef90807. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SE5BU2023904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940cfb847c3653c04b577faa9af1d67629c1fde08e7709aa2e01ba3875ee9398. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/SE5752133887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1937b0e2728cea437ccd1cdba87f1105f11b8d9685d0e440c064f4a1d131c8bb. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/SE5752133888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa472036467c683cdbaaf612d00a73706c4888f0a427a90682d7c7cc1fa91f0cd. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE5752133889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e61cee2c8805ebf2eb01e934b25e8a21761cb415df42e050d34a71d878b774. 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/SE5752133890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8337cb0da868d27020307b710f9d842232d0d0c11b24c350e67e5e22910553. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5752133891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc6f07f7cc28b7b7cdca3253f39732a4f870a88a16100f888aaa8b59c4374e3. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/SE5752133892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4708ff06a76476e9f1dc2731678c5d3c58b797e57b441c29e2f0c70e9fb871b. 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/SE5752133893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f37738dd100a1a968aa933890db759757dd27c14a36abbea3cb015e7e4f8a4. 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/SE5752133894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb7d9de6fdd59732805d3d915dbd8a7f1224373d7b385e23b19276af2dcc733. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE5752133895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a94ec0bc9cf98918c9d2e006682d560516f085a694d035eff502f6ff87409b. 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/SE5752133896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb09403b38b0b73f660feac7fb9cd9d7bf55876df6544bf9f19ba6d4bc5e01cf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZ2J21507682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04817a7992c22f159ddc038ecc7514533885e9c59fd1098a87c3bafa1ee5750. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ2J21507745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2700ca347d836afeab8334263e6f0f4e6f9ac498b312e82e1ccb1674949513. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ2J21508616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c3f2723fc737dd77a8523ce5757e21c1fdfbc7a68993cc4b95b8355e8b13bd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ2J21509059.