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 0xfbd6e31f04be597bb887829f8599ae70f88a77651670ebea524034fc7b56f692. 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/f8a75399-9ff3-4394-976e-ffa1a510f9e4.json and https://artists.proofprofile.net/proofs/artist/f8a75399-9ff3-4394-976e-ffa1a510f9e4.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 0x7fc4192c2f755a742ff9bddf7b693aea6333c384192864f380f25f47f3b82076. 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/ATR981207672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a503ebb718720659755c73f883764578db443b17ab1b172d9739214f4921e0. 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/ATR981207673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1f72663801fddf46924fb3bb6231d324aa91c4dc4b5f527df433d7731b7f12. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ATR981207675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce02b0fbb2c012be12b12357e4ed83465d0c053e84e812a463ea0854355d4b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ATR981207676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b5974b5cee911b13ac3fab61a666d1bf6a9a86a17c9dee60e9ea4a0d3f4430. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ATR981207679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fe733ecaab8c66d8099305bdb8446554be2240af21a8991d6dc6fc64242a9a. 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/ATR981207681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca89f775e0b67becf106a15490715a83101abe38aaa4787207d060e8bd4c0f3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ATR981207682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc245ac4dd6d01d6c28ea11e5e9f268c93eea12e97fffd7059eb58b9eb8b953. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:51:58Z), 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/ATR981207684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133eee4d0cdd61693cb80e23b2c08cc63776ce55b68249d71bae055146ed18dd. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKZGC2410021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c8271bc3bc2fb8fb96d0dd910ad836635e0d0963ed526fa76a1e171b1df14f. 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/UKZGC2410463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe24b9aacf84ce15da90f6376887dca5df339bc28438bf6bbca97bf9781eedfa. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:10:57Z), 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/QZQAY2589213.