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 0x53f69c682fd238919aeee0014cd7235b2cba6d8c2f9e23ccc295d9c7a3a22cf7. 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/0777dddc-fa7b-47f1-9171-2c68194bfef8.json and https://artists.proofprofile.net/proofs/artist/0777dddc-fa7b-47f1-9171-2c68194bfef8.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 0x70dc06ee86887457c265c1325a99d3f7b587fc8b9bacd8173b9e4345728a165f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHZ42068147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d9413e345928579872b85af4841456397fd3ca4e931073bafd69da99bf39c. 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/QZ5AB2393847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933cbc273f2118f6cc7065042a793b4b775d19bd484005f146372919ae908941. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWDE2381369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecbb1dc4a8812b0d4b8361ba3c0e2bcc2681bcf6df29426b1daaef5eea86f6b. 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/QZWDD2376079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bda1015e8d43d1864da7a01f1ec5644d801086ae14ad9f626c8e5ce8b56e84. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USLZJ2441124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06b1cfaf0a586d264d9f5c42b284ca5e811f7f5005d256efca3726c9122c4c5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZWDE2484831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e06e7b9417d6a40049b2578871e743f08faf315bca77754f4875b002e2872d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZZ8A2461794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe897e336adfbe67d78a3858a9c7364169722adbd5a960658dcb22e6ac85f5be1. 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/QZZ8B2471043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06b1cfaf0a586d264d9f5c42b284ca5e811f7f5005d256efca3726c9122c4c5. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZWDE2484831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec67cbd95a52b323a08fb8c29eff5d4c647014c1163570b478e2ba285d9aae36. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBRKQ2571031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec67cbd95a52b323a08fb8c29eff5d4c647014c1163570b478e2ba285d9aae36. 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/GBRKQ2571031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846a128c8d2adab37e1d37e98ceb07a1e7090bf09605a6dbc827991cc4ee3fd7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZ5FN2521414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe897e336adfbe67d78a3858a9c7364169722adbd5a960658dcb22e6ac85f5be1. 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/QZZ8B2471043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e06e7b9417d6a40049b2578871e743f08faf315bca77754f4875b002e2872d. 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/QZZ8A2461794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06b1cfaf0a586d264d9f5c42b284ca5e811f7f5005d256efca3726c9122c4c5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:32:50Z), 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/QZWDE2484831.