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 0x6230656646010497a8f14364686484a2ff100566d5e621d5bf5bf711c8e03d42. 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/e822b333-5791-4c10-a0b1-db75af375a91.json and https://artists.proofprofile.net/proofs/artist/e822b333-5791-4c10-a0b1-db75af375a91.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 0x26a458c59e522c12732b3616876d9ca99f468fb1597969024f7b012f93e20079. 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/ZZOPM2105728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd3f40f9c0a1134be5d41099dc42918e332b36038a5a03327040b86f9590c26. 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/USA2P2467057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9303773a8b03db75ff9f91bc7635424e38f35a8f0deddaf7fda6860c01910188. 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/QM24S2308135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38866207f5d5875f9c7520da5e1c1c99d651dfc2e19201d79aa4c221775807f. 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/QM24S2302643.
Full Circle: Sonic Book One (Alt Sounds Pack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38866207f5d5875f9c7520da5e1c1c99d651dfc2e19201d79aa4c221775807f. 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/QM24S2302643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25262537b63955f0e8277da40a2cab96a1a726f07c6ab95ac42c8cf733b03c45. 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/GBAYE2001196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9303773a8b03db75ff9f91bc7635424e38f35a8f0deddaf7fda6860c01910188. 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/QM24S2308135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9303773a8b03db75ff9f91bc7635424e38f35a8f0deddaf7fda6860c01910188. 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/QM24S2308135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb17209e15dab15c9f2f79d2687bf9cf0619514184a8e1faace7d456b02fe82b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFHK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9e96e5c2b97a2a6d3be7ad6bdd2140506cb640ffbf29252d171bd57eaedbb5. 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/QZFHK2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4480ca4c5de14bee3eedf36671c633402ffb073747703ec97c01278d66b21. 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/QZFHK2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25262537b63955f0e8277da40a2cab96a1a726f07c6ab95ac42c8cf733b03c45. 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/GBAYE2001196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1dda141ee83922b3ae5fb245fe66f6c4456b05a62429d2f2a1ce8a6b36ffa8. 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/QZFYY2067442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238286c010ae888a8c7b09bf21648cc5d1134e764e02f7d2d9dac1c0603abef3. 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/USUYG1115894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0025728ca96fa0e7e29938eb5561cfe3fd8361fda040d9edbdf048b42a2a150. 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/QM24S1705941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cbaca3422ddd01ba2fbb83a238cfd0ad8079ec658b1200aacbe61f8d962b4. 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/QM24S1705949.