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 0x2f36bb2513f6de4c825a650d71557d6dd9deaac1ba5905a1574b72fc0248383a. 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/4baebda2-d988-45c4-b9c1-0b9a896f0378.json and https://artists.proofprofile.net/proofs/artist/4baebda2-d988-45c4-b9c1-0b9a896f0378.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 0x013bf2fb2c3e197cbdd6ba8b4a6f5d793b3384ece4c39a85695110c186b5e02a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEUM71803804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff131ef0ad0cb55a6476d2bcdf16369b96f4dd5eef6f39ca44978084995c47b3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEUM71803811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f0466f9a7f3ffede1470147d28ed3eeec1efce0f1c524f9b321b869a2d80ca. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEUM71803813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b1f18e862e6db3cba7b6d8bf8228972453bfb24d60c08d68b5dc18cf1e44b. 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/DEUM71803827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5a740676459563bc4691fec4a2f8a887f45859cd14a614b9a6f8c09b5e0f3d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/DEUM71903552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2660dbf318712e0ceb79a93cbbdec6bcd6276e6106de02ef29f938129a43ee97. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEUM72004244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4895657458a76a1b65a5f4116df4a4b10d503f0be07edd6dc0a67975889c6dbf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEUM72004557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2a4c7f8d28d0be94310dbfb0929f8bd3b7bc8fe29498e058ad6bcfd12e9630. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:23:44Z), 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/DEUM72004919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ed9763d8c8a0fcd0889ef3205050cb964d471a3eea0fc268597ca046c5f3e5. 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/DEUM72006853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb010ba7d7070895b8642e2f37e856dd6bdfc303d8be2bceefc329ffadbed009f. 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/DEUM72007030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6147d73405d51e4b6202494c50c66166fca26d4742a14d7faca6016d5eb2ec1c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEUM72207390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ce358be78f28c50def41b30ec2ee6597ab523a902d38e0e89e1af5eac4f98. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762329729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9faaa7788d68cae34b3361870814200d1b9d34b6468dacef087533d861e8e. 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/CH7812060604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e16aae3643ce3dd088805bdab3dd468af3d749b1226879e6d1cabeb8d9790f. 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/DEA621900992.