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 0x76f96cf6bcf15cace3d757bf6cac18a0d9c709425c563a1f56397bb63f3c7a4d. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f573521a-1cba-4449-bd4d-e4dd46d72951.json and https://artists.proofprofile.net/proofs/artist/f573521a-1cba-4449-bd4d-e4dd46d72951.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 0xd850305f15731957495d227f182ccb3a4062885038c062f25dd3e902e9072d8a. 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/QZES62306554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8066df2df04fba9223101db7db2641221750d222b05018b07cd73551795391. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAY2279612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd850305f15731957495d227f182ccb3a4062885038c062f25dd3e902e9072d8a. 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/QZES62306554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbb9c244b0d6d873e38189776917a4d224e772e49cf9a1e0aa8b7efc10e1e28. 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/QZRP52305737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5ec8ab298ece1fa31f5f33d4d3a546b2aeedb1f9eed9a746f0bd94c0be2c0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:50Z), 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/QZTBB2326189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481521d69bbdcc16b3a3325580084aeab445420784cd1ce174182d6a6dc4ef4e. 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/QZTBD2393675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b99a375de18504feb5b194f8f4e4e84e33785f9ad0441aeeb48e4073d07a24. 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/QZTBE2391641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf3af3dbf37bd6970d7edb5780995e1a19833e4efa34367209f136753e3ac0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES92415753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f775baf758d84d1ed16a77c541988d436395ba41be359f8a0e6b083e06492c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZFYY2499399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9473945161b3f330e3af5fc899ee5e7559f0e7cbefeefd187adde4bea5fc53. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWY2465045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf3af3dbf37bd6970d7edb5780995e1a19833e4efa34367209f136753e3ac0. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES92415753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb982823488ab37c15beaf83bf5097b4061221931d23845fd3921a62a7caffa60. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA72595694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4689cc13436ea9ff84f911530fcbec95bb167e69b515f75780033f8e2364f4d7. 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/QZK6N2550774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae88dc58b12aeded1d43059c541fecb6095eae05961d17567a517b6da84b27a2. 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/QZK6L2500746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa591f4d6764e6b123f2fe23f8f43202c3e80f70441070d644273ffdb92497fb8. 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/QZK6L2500748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92fe7bb65e20f9a379927c693091bbf72a22d00e7aa0dfa9cb92ec851605cf3. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:08:39Z), 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/QZNWR2509328.