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 0x1ec20e1f67edc8e0d7ec07d51230c667936c3151b2edc854f1fe1dfbf8db4e5c. 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/3ac80805-6fe4-44af-a8fd-c83d76a05130.json and https://artists.proofprofile.net/proofs/artist/3ac80805-6fe4-44af-a8fd-c83d76a05130.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 0x11dbd477b43a167ede3586c63dc6405bf0795623d5c87c2f3cb6a931553364bd. 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/US3DF2256793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed9c7af21cd9f8c3ccf082b56761717f786ec4fb5c32003ead7bbfac5ddb0e5. 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/USANG2227396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae2206c3e94f3198cfb6d5a19f50c1600be4d767d81ba6b48526e3e6c1a36fa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM3DF2278593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa316ec9d080eb27083021d427c094e4cff682087f405dd2e2db2eb88aed2351c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DGA082381226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd870977e118a8d23129863935ef258002692f5c69a061cc8cf24e55c9323fc1. 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/QMANG2216198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38194b3bba6c60e8a55f79bc7d5ad4abca0e9bf5d503bff66b4d13191b6d195e. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:24:19Z), 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/QMANG2215111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab54a27accaaa0e6d9733f2c265ccea88925bc8d0c24fa8f10796dab36ec32b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DGA0P2317674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048e9f0acffaaf2a927ae1dfa8cf02e755041efb25439c3ec027ea62fcfb02f9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812402085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdde0caaad5fa633a2f2d3b5acca43a1b38557b219104394633a5900b9cb238. 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/US3DF2427146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba553a97b62035e39d1f75b710914cf50b637ba675e614fc57e6d54135a484. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR9Z62400655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9116566bba8b878f06893d7fc4171a73f72fbac29f069a72185f956b06a983. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH7812414556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d8438999927e533e409ca8af10cb7088c4ed153dc152ab72c11fb67ba273b1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:49:39Z), 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/DGA0R2499418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01816acf023ee29aebaa9c5630c51c94ddabd9cadb6a223fc77fb2dfd5114e3b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7812424488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abae33fd4a53c0c7d41b49ab816b85e69f6b29fa1a2496b27d9f9dc36f943fe. 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/QM3DF2280732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4463ff3c929fd492da65293136fc758bfc5e38797cf6537b5d2584a50c44d25. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2437267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe20397611d3a56f6f78699a01f199af833bd3b731257e2145da258b811171d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2210713.