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 0x94dd80e06177d0c9ef3e248970b1bd96ea0dedaaaa85faf4964a0657abe2608e. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0550a768-b1c4-4dbe-a566-4aab693c6282.json and https://artists.proofprofile.net/proofs/artist/0550a768-b1c4-4dbe-a566-4aab693c6282.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 0x2f0d7ae93a507537937aef290770e26a790f9af3b263416077bcf55135de3c46. 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/HUC571410506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8151e6510af3917a4c2a2512cb608d3e825f1e390652e6a411c26a7eaddfa24. 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/HUC571410507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3402bfc82cd287a54e3e53be7c652adc14de4f5fe3dc7f3add58a08a25a297e. 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/HUC571410508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc503dbe664bac0803b474a6ec1c703c75cb2da8b5fd8b50e6a053f5d1ee8553. 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/HUC571410509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcb71d575293a4c2e2c4f4809087fa6859f9a91b412b3591df67ee9854dea7d. 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/HUC571410510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3575ffdc06636f38bc4b150db918c22b66dd9c4df367321708ef40df5b90c5d. 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/HUC571410511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc472bbbea63df235f03de415ca3f0daa175f6a9123850f17ef9e28a75677c4e7. 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/HUC571410512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb019c2f16695dffb77adc4c02d3cd6312da97dfb663b0b46b0fe499482b2814. 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/HUC571410513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b656cbba1ed686e880a273097ef9407ca31238934f94875dc51ae9103bc63e. 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/HUC571410514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd3470dec450887c35bb4cc1b7570762cc32a5bacbc8441364b04398c665f3c. 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/HUC571410515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0f7365f2207a4388008407a4480e4b21fbac3fef5934f4ec5d2948a4930f30. 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/HUC571410517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfc5652e8c8d3b25cd034b2104ec5c6f812d103b90a9dd3cb1ad25bf91ce08b. 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/HUC571410518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce48f7f80de9e73452c9166d8d3ead01f577ccb23ab59806cc8acf5ddc3cd320. 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/HUC571410519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafc569a7ad27efcdb69d0163b9085627756bc8db7f941b7730d5183604805a7. 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/HUC571410520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5b27f2ac36f80e4c4bb52bae4b111461183bb6bbc02c4098632889418ad669. 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/HUC571410521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be878184b5868ebc4d4c6e65671f84277821426325d29a93f7ca85534e72aff. 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/HUC571410522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ffe54aed670b655d8206157d45e51771775b59b2da407fdd43376baf5a9af. 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/HUC571410523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4cda73e9ddec2efe1c9ff4495205d8000d3e4b12d8dae9b34070abdb6f096a. 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/HUC571410524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233701933dd66d885108e742845dd1bf24cf1960ff90f29e046b96a4ee8e26c. 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/HUC571410525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403a86dbc02d0d8818b0fd9c8f86ed44de8079727dc12df574f03981cd620740. 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/HUC571410527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6bbc2ae9685d60def66c22e7b427fba81bdb651974d1c52e5393dd58c0a5ba. 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/HUC571410528.