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 0xd81df8f1bc8cf7d715bbbb25e0b96815a423be4ff75ccf7fed9bc9959bede1e4. 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/5601c52e-a348-4848-a3dc-17e11e0b6d5f.json and https://artists.proofprofile.net/proofs/artist/5601c52e-a348-4848-a3dc-17e11e0b6d5f.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 0x3d4d73ef9006937c8a44b8d1e4362ba269cb5167f633dccee8d6fa8bbd1a5636. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/MXD781806808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48989713f259495658f030856e62316e9aa140d3045fb308acbec0271f498bc4. 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/MXD781806809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2563621c5e4935f000fc54ecdb0e03575c26f8f3a139651aea73a2416e43b506. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:44:50Z), 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/QZ5AB2369410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354397fded17d171d36a23624c04a624d4b0a891490fdfc2071b047b734ea04c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ5AB2369411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516fe2f39ab2070cb9950eb9e78c9eb6c99beb36b9976a5efc60aa4befb983a2. 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/QZ5AB2369412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1267520af98783d1e6cb0c4718f421b469e211791677f574671fb13ecaf8d577. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZ5AB2369413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d19eb68edda5945dcbe54f2157189433c32738300c9c170c216b1a658f74b4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ5AB2369414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6831ce5207d5daa93e1f7634b20a1fb4a374613a9a3bef166b31660161be7c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZ5AB2369416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe072b684a7114560640856e8be1060cfd6c897b373430da795b5c30a2243882f. 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/QZ5AB2369420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81b95041ac101fecc45abe957c9333dc2042301f295d649d5d1602cf7557ddb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ5AB2369421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bb83f2b24ce87208b88d1712d1f9657ea29af53f062d4accb869fa0291a1fb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9M2326694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cb4a4ece047cf51b820c2404dd50e736c4b96afc3fdfc7792cd219eace58d8. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTPX2411826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb987b54046e25c8a3d1b687dffd6832867faaa4ac6c92fbcf9cb7dc4af5fdbb3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTPX2411828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d8641e7237e67ca105909429eba7e4bd07bf472d137b3806d918d5042e6e2c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTPX2411829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb23b88b4aa8745809769056beb3a033c27add9220d0a82dfd7dff7f45af51. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTPX2411830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc7e3e07cd462ed2379c11c01877d437f7b3ed878580f6b65b7efff82ed01ec. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZTPX2411831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ec4bb732e32ee28e3cd5f45b84530c8b4bfd376e4ccefcbfb501493eed50a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTPX2411832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6c3d0bdfaeeb1681c0e1482ab60dfa9f4731d63a8808a0138cb41691c27308. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTPX2411833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f988c7e39ad980d0605dd7a42db3c1d6026ddb57f04c31e3c20b613a4bbdb5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:42:25Z), 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/QZTPX2411834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620a79343f32f90da4510f7720ec0de27a64b68f1bd31aea226a334e2a9f97b9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2411835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6075a5faa833309990be2c591f541fd08992fc22e49f12de3e70e9be802254bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2411836.