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 0x50c1b933cd3a0e5346b257fe5fb28b793d789b029cf0bc744bf13aa9867499dc. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f4dcc24-0516-4044-9c48-012185914484.json and https://artists.proofprofile.net/proofs/artist/5f4dcc24-0516-4044-9c48-012185914484.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 0xfd105fea24813afb92bdc1de0aad6ce0d2d877daa3525513ebf071ab5e385bbd. 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/PRQF51100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0d0a829ebf82f100a9e8b04c9ea331a56a466ef861bc7433a79d06d7ca1e6a. 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/PRQF51100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2dfe57e76edf8bd2963ff2bdcdadf5b24c7bfa6b30eecf3991c6ff2fad534e. 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/PRQF51100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23729721fd2d99a4cca8dc6bb110871a839083f4a9b83fec2dd2817b0a600313. 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/PRQF51100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9012848e846b85f96a73f2c4a38c89f3b7c8d529a968941bb3451d07a6279e. 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/PRQF51100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fc00e649a495152152bd08ca4ac55342fd73aee393d61b247e58fb290f5d2d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PRQF51100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad100b87b0c337c0d004f78d1db9b478db2f79f53fdb659ac9c9a4345516625. 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/PRQF51100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348927d683cc522865942be565249ed63ae984ff25a49f0cf41119d701c0c8af. 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/PRQF51100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685bb77093c1813a99e134b5340fc9198ae2ae4d717f531de77b9cdcd2b62d1. 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/PRQF51100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefa33a602fbc6d331722e5df3d6974d5a77501807979e446c0d84f73f15a7b3. 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/PRQF51100011.