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 0x911a1884d94a944f2764cc91fcd20bf7c5a0b31689cb49c82d7c02be0a07eb8c. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3456829e-de04-424b-ab0d-af87d44f741b.json and https://artists.proofprofile.net/proofs/artist/3456829e-de04-424b-ab0d-af87d44f741b.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 0x1bcb07baadae4560628c5a7b05171dd8acdf52942b8e17f863c6594c15876b32. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USX9P1347155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5225064ecf6353d250d7de1f1f04853ab4423de2a96d19e9a0260c5e8dfd762. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:16Z), 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/USCGH1333824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ed6c589e775e6502719de13950e7451f77abd34865002ee9807bbb480e7483. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM9A91529975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02db671b265fe2b86529d251270d16a6df41f55d0e5b52d7a3c7b00f251d1e7. 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/USL4R2245761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc679d3a1388d31ca30dc426d043100f955d06ad3855673522abfc4a747a05244. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USL4R2245762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcfbab8efe6d141b9ee4f781d99d9391bfe4b76f3fa7c2bae33f9bcc04ef338. 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/USL4R2245770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbb39d4564a5dea8d24e5ca19e2eb8a55cbdad1a0874a3cbf56a5b30b693610. 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/USL4R2245772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6208a000cd33ed8b145f26f4db951ead03843e90d67939265331a9c0c79126ed. 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/USL4R2245774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabccb3a13c57f1e9b05cb9ad7a8bb117f7e3552883f28bd176187c94c4d51aca. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:44Z), 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/USL4R2245769.
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 0x0a2d507c2ce8a6d9565b8a43235c93dbb7a7c4802e9b4f4d1249b9b5de28dfa3. 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/USL4R2245760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5691684cf362bb08e4ffb03e4cb7a3132d0eb7f96939ff449f0515a2ccf801. 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/USL4R2245763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0786f4fc91ef6e69644143f2a6070372ecadade5df62655ebd3faf65d2d7afd. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USL4R2245764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcfa6a67f12017485c89b9c61743db097621457129025c9ae3466741b441d3b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USL4R2245765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29df2792cdd63d72d4e1d9d33038b2ba1d5224871713ce51e1f3c3f1871cc554. 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/USL4R2245766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e948481d261b2edd0d2338ced896835a940bd5939c2a5a12c678cd567a5a25. 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/USL4R2245767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf1d107b260b2cab7cd171a5336de30bd32678db4f2ef1cb568646f6408fba8. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USL4R2245768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944b852746394e8fabbb72708df987f7d18e6fc04f6798ea8c3a62cc2eb67393. 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/USL4R2245771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0982ef453a24e3dc0e539c1dd9763541de5c56b92594ec5d5b6ed31a65266b16. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USL4R2245773.