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 0xd2f7440280fcff58406bb3c931c09519f7270237dc0e0c426a3338f21dd38572. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f7e8e2a-8583-49cc-af6d-0918ffb25e1a.json and https://artists.proofprofile.net/proofs/artist/5f7e8e2a-8583-49cc-af6d-0918ffb25e1a.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 0x32c59a33b063897f0385fb97071cf1b4736bcd5cfba0a144e36f57e25b633f4a. 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/PLI361556910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b8e45f4a40e23ec03c4d15de0c862853d79bb2a92bb4ab42365b61a7ccb1cb. 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/PLI361556840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7088e0ae9d42b6136e1ad3d4c33a1bed976e7d0769cd783b3d7007ec29610318. 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/PLI361556920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9835af2a5873afeae420d0290d35172f1c9fc70f0a7ffbdfa27c8f2566eae3aa. 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/PLI361556830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c639146042e33a7c65b429724149c02a2425bc8076a8f09414526b722f4ff33. 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/PLI361556850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbe5affe41c799917570687a2f51e1898e1ee2ebf8a69dd8acd7fd5dc13ee65. 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/PLI361556860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11d30af109a4e62f895fb6812e9b6a4e9f78e24e86b5ec266c281e161c2e50. 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/PLI361556870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993350d4daf8d6b938c7e966c945ff1dc731488e2720c446f456eb5e3097eba4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLI361556880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c20664a24d096d9bbad021de86ee56b831b62777b0e98a2d3c57eaae5ae8ae. 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/PLI361556930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4000b3eede8f8d9c534be32a62df5cfe3c9450fdeadaa82a17eb6f7f66dc9349. 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/PLI361556890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffefa5219cd294978e8c15928c5c41a1015fa88d0e4bc74208f80c7403821cb1. 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/PLI361556900.