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 0x9feeef0e6a86f85a4995f439c698a36de02781264e906eb27115633207cd4087. 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/b29af07e-3a94-4002-bb17-76bc5e195287.json and https://artists.proofprofile.net/proofs/artist/b29af07e-3a94-4002-bb17-76bc5e195287.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 0xe95c9e1a1acf19eb78aed00a3bf0a1e3120323ff0c8423233d67a58e49b18a02. 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/DEBT92300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e44fdab9796fbe0a116dc4a8e365e6347a9eab06daf9eead171c8904f688e6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEBT92400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8a9257fe4868bf45215c90f4c2381d4772257112c52faabed018f864383a1a. 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/DEBT92400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f4dc8e3fb6bf6cf021a8643cceade9cce0bbfba66055ee80520cdf6b743b98. 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/DEBT92400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69fec3e13eec7f40678781564d874ff345a3e899dc1dc6bc60d2de343dcae97. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEBT92400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e1c74b1a76558ef7e79819131066a9f73677e74637b4287f169004eda50fad. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEBT92400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78b075dda59e04619e7299b4dcff6e5885d4bab840ca34a1b243ad608f921e6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEBT92400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f83e8256187b69865f76c50f06548910137169c067a4151889333b3205f0e7. 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/DEBT92400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943fe09a7655ff2519db3fa5d4f2e94c89b8e4f05027fe6ed8446ad096ad8b8d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DEBT92400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc854b8da4d465af7bdeacba86e7135fa172784d73188e59fa41e99b807279ab6. 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/DEBT92400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed9b68390e9ac473107397641d16d83f9b6b4a959d4cd770278985e775312c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEBT92500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bedf22c5d98ea673e5a96ffaa3ab2d7d8094d50d45fd06840c88d5caa028f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEBT92500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7dd57b8ad6effb76c6fcdd89b9b9b01c90805eda25e6be29f195212dc28d2a. 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/QZK6J2417373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe966142e7a7936bb615f976b99180f3c3e1dfd0903a11ddb281c646848d81284. 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/QZK6M2382602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9310d72d199877a5c1a449345bd2dbdbf0265f5d412c7221a637610e1fbd92. 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/QZDA62073206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103c8ff2033e56c72d4fc8387e642198e4d4aa3f5f85f16d655c7a79005d298. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEBT92500042.