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 0x149e7303d5aa55d0f10fe14efbfd99dd47be45e2d33a1ab13ad7a9cd9ec96c0b. 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/0585b19d-a845-420e-9b21-14459be22bf5.json and https://artists.proofprofile.net/proofs/artist/0585b19d-a845-420e-9b21-14459be22bf5.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 0xe6797f88143a03e2204300a57fc9c9df98aca0f0b1019ede52b3fddb29f53cff. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GBMA22452340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d67852fc89e1c75b3fb0c075850c2946d560e0148924a4d5c4b5daa1c8e46ba. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22452341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b430c980ebce4d97b53c3b64643c1b68fb2ec30374e7ed74749ce93c4973a8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBMA22452342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa091f422af65b012c898533aad2b17e73499bf35e2256947c3da93bf98c9e6. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBMA22452344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e0b5f0f50fa94462c9620460a48b7ed9289a91741ebe461b246b5cb8d7e57d. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBMA22452345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb5aa0d2b57af276c7084f759a73c058d25d4d76027b9b65860a22b34385325. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBMA22452347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf5d9a2d0fc33be370fc18bb12c4e7131982c4a739fb7f489e163621fbc378b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GBMA22452349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbe8ac6e71cd7cda546c3df7bc1fbc8a731223ddc54af5d9357119206204442. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GBMA22452350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747909dd5a40b393cbe6d39607c161c2c0853865d67f78946de3e3fd3ff58e5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22452352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033fda79f21765e0cc14edbc2bd44d034786d2b90bc01f1a2d56dd9913958c9d. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBMA22452353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8dae5446c6b623577b74888ade0c9e17f1a873a3a2ba8a8c1051778876eba2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22452354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ed2d72ab2b1b8c2f9153a0a79a1121ca5d4434a8d7eaeb5386409f5744b529. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBMA22452355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b471d27d8a9624d788054da610e87136bcb0685575b794dc8e628eacec6fa. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22452358.