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 0x060bcc76d41e0703279ca5bed1c9f0828c6dc49043cc5f8b984368f3ac0468ea. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdec3797-2892-4eca-b495-f334e548bbf3.json and https://artists.proofprofile.net/proofs/artist/cdec3797-2892-4eca-b495-f334e548bbf3.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 0x8263ff06a1e2fa1340e4b20d1333a5bb6e54af5b58b62fafe2b319e0716d5108. 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/QZNFJ2403314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2e5687a82925858ed01e36b70b45b5a35a395c698f37d08d3be5722d728b56. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNFJ2403315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48cfd9b106366ff70c0a7652ffd06acbff30bf227e4a6d171629f2c756a5316. 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/QZNFJ2403316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f09fbbb14d28160bef3ac3ff8842f7078417ac8cf70e9dcc0e2a4a4bb679f83. 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/QZNFJ2403317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32b5d82a5e6be3db482c92767cd571590db09ed7e6bf22fec8a09eba829d42e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNFJ2403318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5e16654029b367159655a5a0a58adb8b3863bcc65f09d090d74a40907e853d. 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/QZNFJ2403319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f108c7bba2503efaf8dc70e62a5f4bd4346f0cd48af9710389b7fb46d6ae56. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNFJ2403320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db6057d227ef598b08d0d0a1784bc4786e1a4c0d3b8af01380c50d55734d2fb. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZNFJ2403321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165f3bc6fe12d5f8f46b3579c7308c1d29c2fa23030cf8ff7394a12a7655646a. 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/QZNFJ2403322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581e8252912573b448989ede84417ca2dc4b92ba72cc65b1aee5ae83e213dd2a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNFJ2403323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fa52f9dae79f10b4189c666bf98b3f9990d20302fcbc76e8a6065e5ee794f9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZNFJ2403324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79f064cb710da0ed39c16778ec145cea1f5f4bcfacde8832c5a0f529b57d400. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZNFJ2403325.