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 0x4648ced3ca767c8c8eed6c9b9070a12873b79e8aabe71e5312b95c5128f01ff6. 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/c73034fd-9903-491f-8088-9158c51c2702.json and https://artists.proofprofile.net/proofs/artist/c73034fd-9903-491f-8088-9158c51c2702.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 0xeb887f807f4c0c17dc0f4a120d61da0ae21689c7d91601ccd29430ec8b82a3fb. 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/QZNWS2230583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b1443fd522e35a56c94c0189072439fda9e6787c6ec17446c9441f75efeb26. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHNC2212645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb49e132187b28fbf977e2b2ddf0552a9c7f3022c0843eaca74f09940484df. 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/QZHNC2212646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16522b86579aec12697a25a3673153eaaf8f2779e459cd298bdc8943fbd372e. 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/QZHNC2212651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28ff50567dc8f98abbb6974439c12edb7771ae43dd4edad241529dbf2bca859. 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/QZHNA2334580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e533103d0715f63f37f3e995648b5466eee2039c7ebc7e5a06a439336f2b8a. 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/QZRP52275945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ea5872efd1136c753b627865303a25d883a7a000ac26ca31e63f6d6b103722. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWQ2287768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f79e794479d976cd471e1ec1db20f3415b098243af755eddf18de552b205c7. 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/QZK6K2298014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe36fcabcd6ddbec6138bd830672d6ea6a86fd9ad175b3912ec5fd202281b9. 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/QZZ7W2412164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9804a10736e8fcd6b678ad9dce93ef6138e1c88502ba804f96d09152395e285f. 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/UKXN22250884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfc9cb72392e178ddefddad7d7b821474653b0af9f44b029a87a40ac2bbbd92. 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/UKXN22276833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75233ab302e2300f26e4da5bffa367bd8cdd3538161c3b984d12d6c7db2c09b7. 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/GX3Q92338889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cad74c6a1686bf803cb29d9e73e089da000a5030622efe13e1dec80460ad842. 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/GX3Q92338886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62803a51692a0a38f01e740a49b35585d0833a4a07d5caada0dcf5ac98d60d. 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/QZES62540157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c55eb90378a7e48078f0e73428164c0b6810def3e6c98b43223defe18c00a6. 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/QZES62540159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd5610d6e75bceb6521c623198ddfda046bcf8011a37370dfcd59f0af837cde. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES62540167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a90e736903d8d22cfb2eb083cff351a98c1b21d2e0d8735abd1e4fc4b7d805. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEV2456213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c7cae60082f691cfb203017d6867922f58c61581651d0d362076fb50de0f4. 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/QZHN32361596.