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 0x9575f8d1a545b630fcc701a3e8a4c61357caf267ba8cb23c1677aa7f96af20f3. 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/76acbc55-81a2-4784-8654-c1de896e3307.json and https://artists.proofprofile.net/proofs/artist/76acbc55-81a2-4784-8654-c1de896e3307.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 0x115bc25b6656585a2416e8f614c2d5ee62318196c0459c662cd6a21c771420b3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFX2426149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8a64ceaaef18ee08d2b5e3ab6fddc80615126c0623fc1f65021d6aa191d499. 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/QZWFW2410807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d28fdbbd884222044201ac4f62a0e97a6b9a2961527a5f4adc21c541fcde18b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZWFX2428134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ec3000a5924a5cbfdc5bb378514c61fa00ba1b9f16fc4ceb64cd8937dd49dc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7L2444509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedffb3c255b0941555568bd91d0a3b33222120658d287476fb14218a654378c7. 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/QZZ7N2412139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8a64ceaaef18ee08d2b5e3ab6fddc80615126c0623fc1f65021d6aa191d499. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFW2410807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a585fd77552d824e9109a92d8ffef561e53111f9a96ba0f185e7dcc0c944f25. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFJ2477576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115bc25b6656585a2416e8f614c2d5ee62318196c0459c662cd6a21c771420b3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFX2426149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ec3000a5924a5cbfdc5bb378514c61fa00ba1b9f16fc4ceb64cd8937dd49dc. 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/QZZ7L2444509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dabbe42c2614ca789d600c4567d7da75a4d02930031efc33bf64cf09e2c5ca. 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/QZWFQ2442549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644e67ec8fcc3bc4e53665bc1f3a3fa10060e529cb0b2fccac0cc86a687ad932. 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/QZFZ22573945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272e9b218530cb0e59cc0b8e927640e33b489ea7d4f1db51be7d06360ddd2fde. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ782459452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d28fdbbd884222044201ac4f62a0e97a6b9a2961527a5f4adc21c541fcde18b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZWFX2428134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3527039969c8943f5a24f0e205ba7beeb0f8bd4840f3a260cfbd84b83a8fbef9. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZMEM2556584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39af158a8549270e17513620a572c305188a414ff6b6e85299151f26e010dc4. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZNWV2562551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0045445ee9b33c18614249a9241af8f7a3a0f2520eed78e47b09c5bef77a731. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAS2531731.
You Said You Love Me (But Where Are You Now)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c9a305ed7f6c9b4effbc0a754dbb52c54335f0d261df3d871f69cfa891256. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWY2531083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7642220c56b1d438ca14be72b3e27783cbe8116750aa54cd5da5c1b0500deb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAU2554603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c60db7abed0fc4ba07e4951efcd521aed7f61c459f59c4c14fa0eee868ecb6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZTBC2518412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23acff82809ae967dec7f33ee3602023e9e0878ff676314c89e2ef53807e2434. 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/QT3FC2576909.