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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 0x7b12565bfc608fa51836b30ce11684507207397b1e05641d2658b7d10fd8bdb8. 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/559bf1ec-fdf8-43cc-b9de-403af5c84d38.json and https://artists.proofprofile.net/proofs/artist/559bf1ec-fdf8-43cc-b9de-403af5c84d38.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 0x18163f55dad8dee8355980c5b914f138cf50f4337eb6c163b386b4fc6d4f03e0. 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/USHM21108357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf19460da6e216c948df0cddd9326017b6845baf9fc475fd14b4f5115b040ff. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USHM21108361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8f8c25442356d5552c865f043fd056cd572ebdad99d3e353c1c7feb4db6d69. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:35Z), 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/USHM21108363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c80dbd5cb64cbe02685a422d04591225bca0129986691d6245a41446cf294e0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ1674751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b9b83d2ce9476b8d97384c3b7ba576cba5a14f22f9512288fa829951a8399b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USHM21675550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa362ad745f5c320de3242fc5c49dcd104d4c5cf76876c899694320dfa97c70b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM21675551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262328c351a38248089ccffb02a2d46f372ad023d5fefbc84a804887e480ea97. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM21675552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d5a522ea71e5e355d77552dd7fe3644145c2b85b0749c5aee4de4f39b9518f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM21675554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe08cde25684f8f4253a9890998d5c88c3f8c6b68b7dba42cc28003c6f8bb51. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM21675555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb231c296c25b21d57d560828d3a426be0dd69625453f56cd413c09dd43273dc1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM21675556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf556c8cc2c9691fd8b24440ca82963f21cb17b20c9a886850cc1d2dd2bbdc489. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM21675559.