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 0x5b1d23c90b146bf4948d686e9bad528f798f59197ea5db9fc3d3c05c5497b826. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce4ba5eb-4938-4ad3-8006-e42b8f082b61.json and https://artists.proofprofile.net/proofs/artist/ce4ba5eb-4938-4ad3-8006-e42b8f082b61.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 0xee48d89dba1fe08382ecc8ec68e3266be409bc2b6a2d4171ebd31484101a5b39. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRMIM1907012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3486ead62c795805475b8045d0656a14d02bfec5fcf35fa16c73d29b1efdcd6. 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/KRMIM1907013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05439879f46ee92f92f13cb4b0f2231a6127192b2b489a9164a39bd0607a74e0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRMIM1907020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1e6d4ba007844251561c7cba137f134ff663f4038d7c04a76ada5945ce8077. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/KRB621301133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815c19ec25918cee559b24752ccbc5fd5034ba3c2ae78164965ec21c7eee57c5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/KRB621301135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa296d489b92eb196fcb9a50b95d0975909922028ebb2931d7ae6d3216a2a864b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRB621301136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ef09ecea409ab2d0121f128d9c648477e840ccb98b1146b70ec286b940a444. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/KRB621301140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7d216e43908207d5aac209574f9b86a6078a2b7de1f0f7765a67b3d7738ad. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/KRB621301142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32653f80e6e62f3a540b78620389d01a72b7adb0c1d899d294fe6eb77878a823. 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/KRE891900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f8e8308ea5acb81b61f516a91a474dc0d1d8dcb25958966bc3b8750196dd5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRE891900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e5998de8410d32f5bcc469e2a1002cbea04ea7eb4fc3c1fef65368df80a28d. 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/KRE891900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b15a7a40f5a2910115cd37b0e12d15348620ae5396237caae2484d6c9f7cab. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/KRE891900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d6d1da4369e692f5ec43b621b6a834ca8e552df19eb46a8e027a0d33d47128. 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/KRE891900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3be937b5fc8d57a356086bd0c29b3ac3798df224c151872dd2285bfefb4a6d. 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/KRE891900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea211bc4facb7b571de61d6d0badee078e0ec99f0610d0a6cde69f1bda7c233c. 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/KRE891900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc6e126acf3c6e57e1c23827afe7a770c59386afa29866175feda19d19bdc02. 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/KRMIM2011454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7347603f88f1068e7a25d25d883e0f975fc88fe8bdc36d145f24e09e04c06731. 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/KRMIM1907725.