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 0x574e36f4086814d87dc4445d73dca3f7d0cabe0127a09d3b6997bb84a240bee0. 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/89153c10-0bac-4b7c-aeba-9b4858f5cf6a.json and https://artists.proofprofile.net/proofs/artist/89153c10-0bac-4b7c-aeba-9b4858f5cf6a.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 0x48ba673e8460be08c5e043b3662744efcd619583d40e64dab100f8d4cc56b2a4. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPS801852079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8139aa179fd76dc7a17b6f60b4b6e40f6b066c29a0d7336fa05c0ca5f37bf82b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:52Z), 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/JPS801852082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41096788fccb287b0d4de4fe31ab36908cfe06c18375349d38b10281a9b2aea. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPS801852083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1abdf416b3c6ebfab972fe8a1d74057d91fd1a2c3a6d0431765e46793ace5e1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPI1961103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd48c0dafbc29c608e31c3a5a88754d52dd92b485dfb4dd2721cfe8f4c0cc8. 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/JPS801852710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd48c0dafbc29c608e31c3a5a88754d52dd92b485dfb4dd2721cfe8f4c0cc8. 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/JPS801852710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a035bd73bddfab2eaa8d5d55fb413527ee11ce5463be31088ef960e46ae0ae. 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/JP92N2371659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddb67b1f536491685159a806a7a3cea04aa72fbb58aff7702a36bad85091104. 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/JP92N2371660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd292ba8a98d858f572d723a7c90103a238d7febf164ac2728f5a31cb347c85d. 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/JP92N2371661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e19ce8f8af62bca51765126e13dfb3960aa7e116090a40b127b5124251a38. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92N2363275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c08539ad0f193b62cc092b549ebad0ed0d408b0f73ad84ed87e1c567183d0b. 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/JPZ922405536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1560477d362123ca52fcf84b64d2ac3def10ca2da8c27fe626041b988f7bf0a. 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/JPS801837203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8a9a5828a9bdce0041355b8d8284ee623bf5e8637810f3055bda66e9185896. 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/JPS801837204.