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 0xe08f28fd289ad07d7b5b82c8192e48a41217b144222f9d451b7d61a6fa4d1746. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f23f854e-f445-4274-9bce-d40953f867a5.json and https://artists.proofprofile.net/proofs/artist/f23f854e-f445-4274-9bce-d40953f867a5.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 0x6f1d2c45cff6951d6c070fdde1e597f227d539f9821b5d3462641dd2d0af0ab7. 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/QZK6K2342986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0324f87b45b5940e8ba1ebd39f434d21c41d24956985cf7e8ca5d3a9dd6f9d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWR2347255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ae4b27d496b16716730eb310a2c045938b6244378cf0136e3f78ca4275862f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTB22326977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6baafe624fac6ccc5bd6f8abd79133ad6cf5da1d90b12ac10957725caf9429b. 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/QZHNC2477796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6b7ab37b5c315d62d830f215485541ae30ea7b1694231a4f3347072aea54ca. 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/QZHNC2477797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b792d85d3e9db64b015aa3068988b50deb03f08df36029678c5f588db1673. 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/QZHNC2477798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d71788eb56a6cb83ed57e23c389b9b94286d5100da779668d32a267886a639. 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/QZHNC2477800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547e0e72809d53b19b5d3cc4974d88c9a96363543b958b2e51b32b877953cc8a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:39Z), 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/QZHNC2477801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afaf8597751e1b2b0f04b54c3de41b2e0877910af1567f67a6b0fd1744bf3a0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHNC2477802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165ac31fa0297277518173458aac8380033d985710b777b7677eeb057dda23bc. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZDA72571468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191dd613c652c38b107c199dd8de8d2c77d709f2a77a60ee5324f3f590fa3f2e. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZHN62586560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb210cdc3063f5666eb7a05df980efbe28fc65ec509d13250657b21eb228a57. 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/QZHN62586561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8444accfaeb1446437eb799852d92a3404eef13216196ba561cd8e69afb44. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:43:40Z), 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/QZHN62586562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c42155424f6904fc702a2183fa5a602ee036cb7e28338ac4972ea5f9aade6. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:22Z), 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/QZHN62586563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7347750dca68de7ca90f79070e2b8fc735470eed2ea5af61ed4c5883850195e6. 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/QZHN62586564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5841c1e0acc1993c38796bd2f7862e631067702954afc6f9538eaf5f34d51b7. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZHN62586565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8d013008fef9d618a8ffa593680925695ac0a1d8f7f4f7d773e54f89d7f41b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNWR2551498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc038ffea58129387297fcab342bd1a5ad9d45445dcd42ed8e67c771e99128b2. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNWR2553004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd9e291d16fc7f4c8745612c85a4151fa6e3460866389941e47feae1436822c. 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/QZNWR2553011.