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 0x5fe365dd31506d5b62ec891e160b5d3dace74b3e2bd5c58295797e5ca154fa04. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eecde45-73f8-456c-90f4-00fc810d922a.json and https://artists.proofprofile.net/proofs/artist/7eecde45-73f8-456c-90f4-00fc810d922a.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 0x30b5457a24c8f7c5fb0d3625768b225c70e2d9daea35f360c9c2c2c016406660. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT5M22583294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e66b511d5ea27ec08b565185232a6f882cf5801ba1c0b8328fb0ef83c7d118. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:54Z), 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/QT5M22583149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110f2cead8bc7e4dad90cbe5f45d583e8026e6a2c550dc28c5e263d4e473cb0e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QT5M22546967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46b8c13ef4abaed16bef857dc8b4e853fdc5c12143d5fc303f83efc4a183199. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT5M22556229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d9a7a598fffc87cf602c4ce8b4b6597d5a783737561ada3a19d8e420f7aef3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:25Z), 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/QT5M22506068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe2812969906d19061d5f231c4d1bc5cc0b3ae5671238d3cba5631937b11f79. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT5M22522070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c94d0c930bd1b038e13520aa893a0903873ab1c61b2b0a9df22626cd0cdab. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT5M32551028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e30490cdc3ca510677f42f62f6862e8498218f48f43e122cb249b9d8fe29517. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT5M32504203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b86e756f03b2a6afc86cf0a141450ec94ea0474ec5e1c01d578c3d164b7abbe. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT5M32577094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab62d993e156a5296597579da4a75dd7591a25e71c4e1fa069bcab0ba364d34. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT5M32513930.