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 0x59e25af5464e19a02026e001951a7fc4d5b42021a096ff51639dddc439c92438. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/997c2f0a-52b7-4163-9780-8144f1a32c37.json and https://artists.proofprofile.net/proofs/artist/997c2f0a-52b7-4163-9780-8144f1a32c37.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 0x6e680ba4b4366927007aff854f1e5ebbb4a16e71322d13f86d527b727dea6d34. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCACF1538894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9a05ee1ada2b1ccb7e9ab5644498116eb1a2cb4509686c9187b20be6d3d30c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACF1538925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe6b55dad13609e2546a1608f85059f84fdae794afb3af3aad948f301b0c185. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACF1538902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc49ee01401cd26c685e757e1b07d42f050e9ccd1ff7a8734cdd040e9f9988. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCACF1538899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5754fd9e00424f324e3159edaad3bfa2a30f9d7b08387cfc0a2ba04c911ca813. 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/TCACF1538923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb613b4aad6e8a83c278cc3e07dcd4ecbb6d3f0aaa812f6fa4df90ec55b6112. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCACF1538906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab1d58fe08d1b86ab12704af9647a0884ab6e8fc52fb46899d6bb4b9e8507a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACF1538914.
Do U Remember the Time (Evil Needle Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b5ea757fe67bf0e5fca882e4789d43f413164858f6ffd6e45694ca9bb8794. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCACF1538918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf912e2d62dfdf92324336143a048376402d5613093ab74552e37907efb9c1a27. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCACF1538919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7f171dfc2b88614a698db18b69003f6663137a2f2a8b5c2c64348d9b949e09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACF1538921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f820f6020c4492fe0c3ed6aba8d72fa76c09252123503ec37d2d88cd78312. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCACF1538913.
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 0xbf17cdde791710e923b4ae12f5dfb8e41f9fec0b5684d9c9c75995e2d8b98b93. 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/QMR6U1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d164f103eaf770daba487a46f6a38998f027ba36ed1386c6615707a4d5e0fb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMR6U1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d0d94acf33587e2d96394c78c642d0861dfca6f567cec774529ce57a3a3712. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QMR6U1600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a03c8c0778f42d5b7c38762fc1af0050f0a7b4bcdfe9afb9ee50dc419b9f18. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMR6U1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09acfbfc85abed727a343a564bec3b9231a44c49a7152d0a98546599388d25a. 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/QMR6U1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a2b30b7f0a65735ee83588a1d15f680fafc68c52f1110f365848d8a4fbc3fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMR6U1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51734dabdee90525e2ab04a24e11820475a953fc93df1e3bfbc9a3975316c65. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QMR6U1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a2849e3dd1ebfd8b05c0c3b8c431d711870bd1bf71477f3fc275e150521f97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K2222050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58050917ae5bd8ede49c91899fecf464622f2c49b0754e579f8e3c7e5d646f57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMR6U1400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8dbb89c5d9b37f372f6dbf362375f1f484c3a7ae6f91dcde6c95f27467a4df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USD8D2003006.