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 0x05e306cc461be06c072da677c7adfd5e17654f9fce0411bae0507091ed2a23bd. 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/3dc5936c-06e5-42b3-ab4d-f2a57fec73e2.json and https://artists.proofprofile.net/proofs/artist/3dc5936c-06e5-42b3-ab4d-f2a57fec73e2.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 0x75a4f96fc3da3cc9c0e8b34eefa19614cf20232424aad938ee2ab20ca90f6861. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X42167252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994cab7453ab28ecd9b8aec38bc05d86f90dff685848bd8f449368aca2d0d70e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR59R2154543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ee100262aeb7e985ed2bbe8903ce6e4209f9b79399abb89e8ec17d62a3f07. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLFP2048538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ee100262aeb7e985ed2bbe8903ce6e4209f9b79399abb89e8ec17d62a3f07. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2048538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33042a20c5509224e8f831c0dbb544367bbe4c782a576cdce41cba7a8121423f. Chain 2 (Bitcoin): anchored in block 957529 (2026-07-11T06:30:13Z), 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/FRX282234805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4179160745872681f82263b9b1cede52d42bcb3cf77639c940b450da4899aab. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DGA052263927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2d3bdacc27ef402784556f61e63f12862d8c2186b74888c3659fa9bf6491b7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX202373641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158915f67e56c910ba1ec63984406f7fc31c428de1ff43acf0492f30412072f5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282424140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d27cf1f1f4fbd51dfd7f41a9722a146a3105bcd1f0d65c87e023e29e85e21c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QMDA72412830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa616006746dc9a9fe030140445adfb122f0c8dc98e24b7f525d1ab8cd5a790e8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR2X42500337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c972c3edeb52f1ccf3c6dbdeb9d5fdecfdb48d6ff891d853ec82ac8702270a8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR96X2510151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb8093b74b586e751923cec07ef4bc262b34fb297e1197c8095bba05db96e95. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX762550073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078706e9a15c17c9e4716b0db67603f0e15d928c3add57af30e5a79a44ffb2d9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX762550074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4971690d6436f07ace1b5d887fdfb20cb73c4d74b1bd76799af8b9d9833c1e0. 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/FRX282058736.