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 0xdc101f39b8ee8e5501cb7070fa8f5bc8f66a31c4504e50bf33e76e92fa092d47. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c1592f8-d82f-4dc4-9373-e41885b61f8a.json and https://artists.proofprofile.net/proofs/artist/7c1592f8-d82f-4dc4-9373-e41885b61f8a.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 0x5d87700d5cafa472fd77fbb632d6dec80ddd56354389214a6aa7c7c105cb27ba. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2388931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02fee0688235029f11c4e90d599a6c90144b66591bc6385e6bd96ecfa8e39d0. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX53U2388933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbb8e9e2b9d24010b9ab9e3dad9c77a8c14c15d298864a2ec7b8623fb60cf99. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:06Z), 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/GX53U2388934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07569641cbc549c1658d2f1d70ce21f185456682919ceca736819485a8ed8011. 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/GX53U2388935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ca45737a6e844e5201358502d9b37af848c93234fa24c09c57164f54992934. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:44Z), 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/GX53U2388936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd049e36b598cf5b52bdb3381355a643442468ee9179bee040fada3640977b0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:38Z), 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/GX53U2388937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0700c6d55f192de17e91eff9e72fd2dd9b3a729333e05036d47937d9f374e38d. 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/GX53U2388938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5020acdb27f4ef32cb23f8b6c9b6f5d13c74228515a8bf01b3326655d156ff5. 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/GX53U2388939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a656a26fabfbefde22d28c035e9970e68890376ec09f714ff612bece17ba84f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:40:34Z), 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/GX53U2388940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef75eb1ef1c8e4426d5c90db50de028aa63a97ed670ffeb0cdd4c829e6766b94. 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/GX53U2388941.