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 0x1b401c01978635ebc6f4417b0d6a66cccd71143f0deba5cea2511f5ebb01f138. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a61581f1-3ab1-4291-b72d-9f420daae29c.json and https://artists.proofprofile.net/proofs/artist/a61581f1-3ab1-4291-b72d-9f420daae29c.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 0x90f0ce937061752e483c6c266d4e02a99bd271120232522dfd8d320326a723ef. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:37Z), 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/QZS7J2303158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18690b05fb9164e68d4d78d506dbf016e6c23fe4e9b811658510ec2d702f24e. 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/QZQAY2484918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54267914035e3d45e72c5b9d76c8770c895188d6e7f243acdc2178c1ed630a7b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZQAY2437859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa82df15e9a26218c8db8412444960a772147adb5d169379d93eedb4cf6e09ec. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTLA2470854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e7867687f66e78daaa7f4f6db22b3896d88e2fdcddbd87159f2af1acf797c7. 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/QZQAY2437239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2945912c92ee8771da24c5d172f9aa485494b09f04c85889f10a3d2688ff34ac. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZQAY2442503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148dd17397a7ebed1e70bf5fcee68a33e581e7f3a430fc1bc221cb81f98d9f50. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTLA2474490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa82df15e9a26218c8db8412444960a772147adb5d169379d93eedb4cf6e09ec. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTLA2470854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb754d02e745a3d921438728132ca94990c7a4182279bfaf84c390aac8c1310c8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZQAY2467164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d99d0e3a2df6eecc60c833ac5c1cde0645712e0a80309ad191760dcbe2f3a2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:31:14Z), 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/QZQAY2411668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bdeb5788269deb15711af9de5ca9c62e4f48c22c2fb6805f7736f66e69d396. 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/QZQAY2598633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb87a91b0151c1a3e9df21b76ad743a690b0e3aefff2d9b9a9e8897a823ccbd2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS7J2550193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f664f063d87b8cfeb7a4ec776063af4eabccef0bad7c6da491ca62b426940. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTLA2587431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaad7e3ed3e599851f07d53e3abd2f4a7c17c42417ad6d4c5b5473d83008f7e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZSYP2567578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde98585ba65463afdcd525a0b45c0eb40b774b8b8b277ab6ff060fe00de3dea. 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/QZSYP2539789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde98585ba65463afdcd525a0b45c0eb40b774b8b8b277ab6ff060fe00de3dea. 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/QZSYP2539789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dcabb08a747d4f4222e5204cb4b42bc73d7c678543badbbef8b8e0d8ea9fdd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZQAY2518577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a05519ed065e27b6bfcb3557daa58d6457b77daab9b25d6367128bef152d1. 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/QZSYP2521204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7120f03cdea1b125db72e1cdef95a1186aba85e241969b740bfc3794a5e182. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTL92571684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb775cb1a27f47d426ea3141755610bed82997fdcde96c72064e9d9e7f8dbb4c. 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/QZQAY2567120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e1bf9a416104561fa81157a45641dabe753905322c6d16e6efd6456e76c7d6. 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/QZTL92588488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178bff5f9451682ae532535f2c8367c9ab9eb1ed48145f7cc2b595d433f39199. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZS7J2580441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd631f47018d24dd3cc6ac2aaa6665ca90c4ce926b9c1973f79b40c871eddab5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:10:39Z), 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/QZSYP2570189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412f74cdbefbccacc653e0c2e62a29df1b3d19391eccaa2e3ca4d07c58d11012. 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/QZS7J2549811.