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 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 0x74d0a6e9eca94bfacc2d9c7ea6bd3df38fb233979301ce45adb073a7354a1a90. 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/f2a58360-a4e0-44c9-9662-b1d5aea5c211.json and https://artists.proofprofile.net/proofs/artist/f2a58360-a4e0-44c9-9662-b1d5aea5c211.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 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 0x03da80e79c0a2a2c69cc1ea24d73f9442df1e7ef9e446878b30176bbbe5af595. 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/DEZC62185839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7448871a5e98b286793a84a7eb8dbb9514fd6c0c0137d7d17ceaed7380f0567a. 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/DEZC62185840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37198dc1267b0e089d7875a45db1fd9fef57965c15a10c4b40a0c71b08067f1d. 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/DEZC62185841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83d151319f49f6fc28ad668a390f8077fbc703e0416d6ec07d1869423b3d6c0. 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/DEZC62185843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b836f059af396f4abbff85d5e76a22e9e15b282d10442f08174fba6726022. 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/DEZC62185844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf1e7950cdf246326983a1c18d36be93584ab785b9e4e5b6bf94c2915df93d1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEZC62185845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24dcb6397a92af8bc7acde671a4f408e1dfda02cd0238d26cc792d6b6ebb62a. 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/DEZC62185846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f26aa02c1a7b951da2297852edacc65cbe8d55f7859a2a464d2c8adee362df. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEZC62185848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20acea86f618ca90eed7e5afea42a2965e9f2db5e8931bd85f951aad100ad1a7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEZC62185850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eb61b1920bd11857fff8aa6b16381fe2e521c6bcd1c5d115ddb5ff1effe5c9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEZC62185851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ea6bc96165219236c4c439a8e9adc7f0d48b1eea2a1c12413c213eeae45b29. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DEZC62185852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f7f6f454d7784aeb86a7a853dcbc55cdaf172971a62d15024252362ab03ab1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEZC62185853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd787ae1834d23a8bd020ecab7cbab867634de7bb23a64597abfb69ef0c4a28. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GRPA12200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9766d39849d636893e39dcb64e6472f04025559c77f96c93dda5ce668def23f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GRPA12200509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1533d89c4bb67a8395cd27cf11390e0253c055a0e2c43fef68fe9084cd03e36f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GRPA12200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d36264fdfffa3c1499116d838187a61c23e31805001199c0b3016ae89d767. 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/GRPA12200513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b389d27a3190af9855633561f36d177f0f21af7673c7542b1f506f6d9af1c7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GRPA12200514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96a93eb60c618aab719b7e1ec1cecdec94357ace2906b4eba8a802ee0357672. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GRPA12200515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327a8ad508a53f5cd61848229f9f57c0015a92438b25586ee840edc98570dec7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GRPA12200519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd787ae1834d23a8bd020ecab7cbab867634de7bb23a64597abfb69ef0c4a28. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GRPA12200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9766d39849d636893e39dcb64e6472f04025559c77f96c93dda5ce668def23f. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/GRPA12200509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1533d89c4bb67a8395cd27cf11390e0253c055a0e2c43fef68fe9084cd03e36f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GRPA12200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe05b59f84b352574d4356cde7b60740e87b30ce205c43d60770f26e582065d. 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/GRPA12200512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d36264fdfffa3c1499116d838187a61c23e31805001199c0b3016ae89d767. 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/GRPA12200513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96a93eb60c618aab719b7e1ec1cecdec94357ace2906b4eba8a802ee0357672. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/GRPA12200515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c57f1cc4dd974bb881534701683393b1aae576e843a3fef28c5bcfe4793ecc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GRPA12200520.