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 0x8acea74907efd9f9aa264d5a124e6151127e2b9e74d318df2757e77c225edc66. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfa78ced-f288-4f2b-bdcc-afb0d83ffb1f.json and https://artists.proofprofile.net/proofs/artist/dfa78ced-f288-4f2b-bdcc-afb0d83ffb1f.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 0x8074e0759e00c8a9057583edac9d0ef218a7e3c517d96b806d9d808bbfe5e89d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNMT2147562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe031c3aa5715b2ad7dd7a951474a8d47904124c50b847dec189e67c3176ae4a4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:50Z), 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/QZNMT2147563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6697ec56511a3ad48d4c69e360d738bbcbffd5694905cfa54d97a67af15ec509. 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/QZNMW2107057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1714d7a2020625bae3b9f0f1dd2c067e1156f69c7f5ed1339ec276552ac63996. 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/QZNWV2196207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c093b4fa5bf4c7e0f3dc0eaabc1c6b8f729eda21992db59371c0c202e7d8eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:28:21Z), 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/QZTAS2165039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc924d5b263cba9eb53561aa36111e2fd7f9c07569056c095402757f0f9108607. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:26:05Z), 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/QZHN32202492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036b9a5c51ffdfd8c5a36cb0d6e74ff5f813eef5127e85ca80461e1aa029c734. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:29Z), 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/QZK6Q2272222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14766412b973afae6db8ffbbe62395b14824e4af97d31d4b67a2c09157477d8. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZES82380110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35993252907ee2e9d16ccac7cb89486f0f59a0a4a54df3896d90cf13544fd29b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6H2328032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c2c16a4487d939ff81fda87eabeb22829a500ad78961f74998291d82ff6762. 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/QM6MZ2423634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b5a36a10a2ef0d7c2386cffe9d678be01361fb9a113a224fab9f6fae653e99. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N22475870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92afef809cdb5a3389dd709dabeeeefa6e25da334b239662b4f5245e385a01. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM7282464419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9940491932878dad90dca6bac06758086335ba7ab8c6c73aa467cb198549147. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA72475479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169ed747383602f4baa3085653e3d0f917a4cb0d1de1437f457e66ad030287f9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:18Z), 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/QMFME2441016.