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 0x8e1d9e4d6ba91ed599330cf84429c0cf2f07c0d5abb03fa3183165843a3712d3. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fd37f3d-c35f-4a43-b184-1d12e7c2c4b1.json and https://artists.proofprofile.net/proofs/artist/8fd37f3d-c35f-4a43-b184-1d12e7c2c4b1.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 0x4b99e36c00205726618729f003da45e92b49609c8b0d8cd14d4dbf6266bd85c4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBSMU9644833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4903dce192df2e45a5114c4859965ac8be2770f02a63d23dfd36ecb99168f783. 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/GBSMU9638476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67c635b311f0ab6d862d4a3d33618edc61783598eaa61c65a468e47ff064e4e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:53:31Z), 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/GBSMU9644794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822706e1c11e9dc251c0d9255e50b317f87241478b52dd67c0f1a2712b49866. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBSMU9644701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa90ea2728d93f49f45f8abd837dff34ee05a5a6a43326d8141cb391e01bffb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU9644856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a3c40ba051532f7cf9e08e75c38af234476069f9666a8d9e3d525317d41dec. 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/GBSMU9792745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e33e123d3be3844a9f790467269507d6b20605b1e6c1dd494cdcf8d267107b5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX38U2170862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b5b92d1fc3100af392267e7ec264bb86e091ee52f9b8f1fcf2761ced52ce4a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GX3HH2266767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f530f70916547979f07eff5fd23ea34e3f65a28dd9ad0c3707a42848a61fe11. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:49Z), 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/GBSMU8625145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273a58aa085e4b29945acef2c5410bfb953843c284261af4e072d9f170e41b9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:20Z), 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/GX8LE2346964.