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 0x75324c88d5d12866dea9dc55390008c4e3bb93c82ecd32fcc2411981d8183889. 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/1d6eac07-b3e4-4f34-a6c1-9d9f1bef3ef4.json and https://artists.proofprofile.net/proofs/artist/1d6eac07-b3e4-4f34-a6c1-9d9f1bef3ef4.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 0x8b98a83455dbd8ed516a18eb177a06843c547bc6865800b57a00fb931d616d67. 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/FR2X41771652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d03ae9b5a76a6423c2b5fde46b55cde850bc03f29f765fc554123a36042f2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR96X1702040.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb68d23fef9ef98c962604980534eeb96c6f9eff045257d23251c3b741b8d65. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR10S1898202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c01d97f7d5e9383c23519808788c75af8cb5ee42db05520832e9609a865b5f0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR10S2005942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db70bf2ff295c91258b842216062ba482df8cb7065ed4b406c9fd1a8c5c0923. 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/DGA052084898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc5a77a1bf4f6a30b5c6835884fa02d8009edacf29ff4c32c5bc6a6061b92c0. 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/FR96X2206274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99806e35d2af3bb708c814c5d3b9403e3435f5bf97bc5e1ed87f13bc221af3b2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR96X2260794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934ada9c18d47e577356c314d971e25eb2fd936a777d9a514459dc09064b1263. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMDA62291884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856ae65d14a883563d003272fcba8a7368d032dcf081af06a5e63d5bb04d8ca5. 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/FR2X42333109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb490cf52ea22f2b2bdeda9d66ae3e8e92f307ab99afa21b063cf14bb56543589. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX762392179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02827c1335b14e5efafc7c2777a5bfe1abf77150fc721275d68521dfde16d247. 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/FR2X42400993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481c0b3448dc95759efa580f633907b3b995480567fab3d20aef642abffea5f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX202445653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2f710f194cd0c46dc90e1cbe6353f43a0d345263e8e685f38b805f5babe8c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA0S2416539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e294eca8fceab78d66de1a784444ff7319f494715978b5ecfaf7dc6be0f4cd. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DGA0T2415712.