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 0xc5ab318fd96877799fb6281a711004aba4c3d999364a20cc684e99287082a1c4. 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/74283f58-78d4-4bc7-b8ee-47e30326b38b.json and https://artists.proofprofile.net/proofs/artist/74283f58-78d4-4bc7-b8ee-47e30326b38b.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 0xe54b49941b6adda3d8f6b0fc16b4adde84132bc05c173039664e089fefbb7b82. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:44:28Z), 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/QM4DW1603964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe3ce933ef54b4ba45a171984dd6f95e999a690f11bb40a7ab746af871786f4. 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/QM4DW1603969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dda3c7f5d483d57437f6128d0da697c2f51bc7a681ea2dc40166194d6955a22. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM4DW1603970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e32ed70a2f5f3a69d73c4a6122fa558672d636b92310e1873d7f1a1dfad2b6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4DW1603971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c869d617dd87a0b2b54ea035e1629dce60fbc2b653d81c53c9a797c75e2d30. 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/DEQ121747529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f086c303fc619563c0c2c2c2ecd37de4a48f003697f9e7369ea714a677aac. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEQ121747530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8025c5d731a5731a82bcbaa3bcdf85c157a9c68f387e3767fd089650fd357f. 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/DEQ121747533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db7bc28280ec115b9535b54f22784299d11e6da33277f14e37d750887a473ba. 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/DEQ121747536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521052ff28e6974201727045c233411c75063bb5186cd48b96f181fc3e618dfc. 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/DEQ121747537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a26ceeb66da58aaaec1ea4a7314c32feaa23b664ae9d96ffe1fb196dc4bd62. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEQ121747538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe977a756a9eb026e00838b160e4cdfe7af1aaf2bcf7b7c7323bcb9526d62c34b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:18:37Z), 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/QZHN61992730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c6fdc39cdbfa397b4c84634cc925454ea41f85fb45d25ae611d687d52d01ec. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:48Z), 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/QZHN61992732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde332b0986329a20b0e173edbdc8e2439a324df18e69345a5148a9cd1b11f6c4. 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/QZES72035584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ae80555092144934c0403e1c0c467ed07db987ec6ec7e2000e1baeef7ae83a. 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/QZES72035585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0c7e17703e8d49e9c1f8ed463b6ce39445883c09fa2e51b899e5cf6c8f1d43. 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/QZES72035586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54350ce9d26b438022687cb7065aa84aa7acda36d2405b48c648550a54f083a. 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/QZES72035587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c5f2595c9101f60028b6419c0dc3ec60c235025860ed66b68e1716166fbcbd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES72035588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03afe8725f9da458a824457a8282696b10dbf1b026acca92be7bc6e0a5dfa56c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:51Z), 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/QZES72035589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf281c9351617771c03667a071746e3c7d00cc864cb53c9bcde18a1b717f06e4f. 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/QZHNB2181909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfac66ad3e1c055711c946cfe943c9f02343f79aea7c4587f50210bf736900c. 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/USEAX2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25392054a0c4e9429e392d24f1ed437ba4488888f96f7d1af67500cd8331c837. 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/USEAX2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47410ab793504ef4f2715fc1f8b699ea4f95cece04cd0748c73111744f4a8b3. 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/USEAX2200024.