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 0x9129bf9d8323b0ac98d8392ce9f275271be3f247fbbb88bb5cbed620c778cd54. 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/ca47e773-69f0-4541-b01b-b7ff343a37f4.json and https://artists.proofprofile.net/proofs/artist/ca47e773-69f0-4541-b01b-b7ff343a37f4.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 0x38bef427f3dce3fb988b478a1eb9e9e18e37539bcd87973b3439d203141d6ec8. 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/QZNWS2494821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887efa6f2f1bcad5b3f4a35d0128a56779ff965e4692d124e050427942c8c550. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWS2494822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db2329386f22663bd8df726e25c6ed96b8e55d34c4d878c361ddc27030a550. 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/QZNWS2494823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8a630fcc27aac1a9b06a8966a3170646dae2a367361736eb5288df044b0a9. 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/QZNWS2494824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cdb57cb6410e737d309268ef4143ee4f846d675f18600bf75e86395b87086d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWS2494825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7dc1b5cb9cc131c80b8e3bc47e75039273932f6a328a0c5dbabf391f78496. 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/QZNWS2494826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c4168176901c97a6ef4718fe7805499b562fb1f361735b96a4a345e6236b3. 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/QZNWS2494827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcead5c05a31d52f492b7e594b2de754eb4afffdfa4c7c02187ca1d54bd5a2aa9. 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/QZNWS2494828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b6dfc52402e4e17e75193a03671413177fdce1afcba336b753652db7561796. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZNWS2494829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae855694c6315f7f530f7517f1985b4b30c8408eaa1b236635cf326920692fb7. 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/QZNWS2494830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a19ec7e48e825c1bbbc54d3a9ea9d78a810aa1ec0d2d58d62210c1317a696b. 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/QZNWS2494831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e61ea8d2f37df1474285b3309cb2f9f4e4b7fad6a29bd47a5a6a0cf9941b43. 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/QZNWS2494832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631433405c03e550cc382a62ff7b003ba2c35298d0bf53eda3e2c42853eef1c. 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/QZNWS2494833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4688d13f7de7968d5e8995b62c51df4fc69ecac095dc101f05a9a967c23fe33b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:40:52Z), 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/QZNWS2494834.
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 0x2a2bf1b29faa989d6d84b58e154cb6395fea3ae334410033b63c5e38b5b8ef7e. 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/UKXN22281522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8b2184c298f988f9b2d6e93a63e7694aaf25fec8719de1b7f77512f723b57f. 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/UKXN22281524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a9bf1e0640e43cab6421dbaba9c857dc1c45fcca7a31bad7fc78f9cba5c046. 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/UKXN22281525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57444a0011a0a81212cc59e3b1f8915f37b73c36ae779eed44c803cd953db1de. 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/UKXN22281526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abcc30037de1c7f662e9c96e330087ad2de1c39590afab5195a48fc5585b8a1. 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/UKXN22281528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c102528b1c3094db833a4c450317052ca6a0fc388e6ba48d652c6f6cca7c6da. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKXN22281529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f670a855c31072a5303f9156ec9b316a2abda7a78a87749ff90fd384d6f897a. 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/UKXN22281532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc258391414a5a2ce5a34a4a059803e8f9c1baec34289be6020c32d71b4b1d422. 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/UKXN22281535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1332ee657ede3ff6facc8995cd7309fd806f8b588bd7c16152eecde18a66c615. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/UKXN22281523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368eb11291823de82e803656b610dbd721fe40f6c513eeec641425ff680ab109. 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/UKXN22281527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cff9954d4a2c5e150b639c8626048d9ca749bbba9958fff529ddd842e986936. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UKXN22281531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db3aef7a63c979b1bcfca354b7291904d545c18e33d6650bce452b950c50e34. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKXN22281533.