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 0xf283273461e0d5a8c20902423936dad9b574f02cf3499eab8a08dc7b8d7c693b. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03818869-e42d-4c55-812f-303eb1b07c03.json and https://artists.proofprofile.net/proofs/artist/03818869-e42d-4c55-812f-303eb1b07c03.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 0x7d20fe493a7fd2c854707dd699695a19599a366c06c611f8542c56203fa143d1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BRVR10700553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459ae82abc36c14b959ccf58544b295a96497142668d4a25977bf2fea5856f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10800231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca38879b7aed651a9a2fd58e925f380e8d9f462aa3a297ba1953b66455bb4af1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BRVR10800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866e959f2f4b5ca235bc668863d513f4368df7503f359b319c28dab81bf1b508. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRVR10800416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf129f11bf44e63e6595bf98e480f41f447e85e9edf6ee96030bd193b0b372e12. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10800732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d2ce36b839a86751a5965b24d60ef621e977d2efe55130585701e9277c95c5. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BRVR10700687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e50a7f95c5ca4cf946a61eb0376f900ab1dd3a5fcf124c05e1eaf3a27620082. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRVR10800714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4350814702f9d831958dc09cb05f1682862252aa90e67a187a3b993cc7dbe549. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10700832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf727790f52bb2ffad0a5412cbe59920aac545ebb1d13498f2dd92132ee603ebc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRVR10800517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7d332686e9391e01049fe0d50e78413f1335d6751d01bb1a886da370f58efc. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BRVR10800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a922f88a1b4b32987c9f7811d36852602801fcaf6fd483f101cdae54064d47. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BRVR10800477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51990e52c21920d7bba0ab5dd9dbb26b63bfab12cc3ca0f02597bc2d32bf82a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10800548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7123d2c7a60b7a1647ca133cb0cf4913044a9a60382c51d94c0b76ccd68c0f67. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10800729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d561ee3979c4dfa8cb6254569590b2361a8e5cfde4befe06b58d738fbca29. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRVR10700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320213d6bc031c886ef1c514eaefd71275be32a1eebbe2bc12bfea0ff3b9580c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRVR10800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788b5316b8c57a0bcf5edf90bc7f9cf92e8814acaaadb4859a5592ae29956e63. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/BRVR10500728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989075732469545419dd14b95d96c5e522bf7bde832e29df0820e9a8219efec. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRVR10600752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe488c669ba8fb9397c699d3841ec8991197ec0a945c79b95cf1d76d9c42ca7e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10600934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3eeb656444457db3f4967462484f8d06a3c4036642e5394df8e6828bc9483b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BRVR10600750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8443250775404b7db9bcd0d7771d812b0496d69818b2b58316f11768c0226e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61877829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2303330d7e2d85a523d81bd3e945c459d4a04a9466499ad7ec74d239bed45d66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61877830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d24bc53404af8197a110d84e60fe0c43fc17e2f9fe83d269b8236355b9e2d80. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMDA61877838.