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 0x149d4b3145954b3138f8817f1868ce6caa2d6c4ed079e64e6bbac2c1fb70af35. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b3051ff-5d2e-4f57-93ef-1825a775c174.json and https://artists.proofprofile.net/proofs/artist/2b3051ff-5d2e-4f57-93ef-1825a775c174.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 0x6a062f581749d7ba07afb007726ec1ed028d517dbabacf905297e2b435f5c653. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNB2539494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7d45e3fa601527d588bcb09c57798d0c280da51667015d7ab16f105242e052. 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/QZHNB2541633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf7a73ab85a5df680ff963d0a706d82f6c0d11aeab35b0f8204c92a2e552456. 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/QZHNB2541702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9010d76ac009966944c4f47f6915fd13c0f143e2c3e133ac40c913dea40a35b. 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/QZHNB2541728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ce0de3a167fa6f6d57f98a079b89b3787c222f9df92b9d35a1dab785ed2ac. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZHNB2541731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fbf09668f7f15ec60a32581a803bdc19a6dac1bab062d6a9f588de3d75e03b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZRP52531971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4830567816952dab4c718c1e88fe1567d7b4c12be6db7f3998075d06abacd4a0. 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/QZTAW2554164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce45a58b0c18c09cd8d673ed0a7fd37bdab716e71dfe6f3067890128a1635fdd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAX2583990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59927d5a588eb87d141ca9f8174eaadd621ed0de3439c5351f129dfb8290975a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAX2585921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed8284cf84e26d42ac29cb7aacdc5ecdb28128087cfb4338f54f9c7b9b7c658. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAX2585923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6ec7aac4f5a47e4e7336c4a0569398422872c77ccea700631b5af49def298c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTAX2585928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79bb8aaf34bbe4da53c12b6f994fcef0653d269e11195c2205ac1c19b8254ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:46Z), 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/QZTAX2585934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4cf6078d21b70a484814c86c657fc4ca79b6a662c53f30b1aec5b1f9a836ba. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:59Z), 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/QZZ772589940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb48d7ae40a016dadbb598f111ef4ab2c543b51e918e33715fd2424271b484f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZZ772592052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe02ee5a3406e9e9b5b01ade84d4cdb2714264291c22ac18505fee8e9165aa67. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ772592064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acbe7f6906d87e1ba10f950c1985f42faee06cd7feadb39f1fa5b711733242e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:19:55Z), 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/QZZ7N2527511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b4760ea183ab6930efdf19fc82bec87735dca565f97804971733bd98db451d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ772592072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7452c59334eb6b01935f6486bb652fcc29a7c7f3807145a7cfb30f219bb952. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7N2524038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca4699c4ed4fc19b34fb3970e6c92476a08aa28cb0523f85c3d62a521f2fc5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:40:39Z), 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/QZZ7N2527449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2d2efce722603727ca3587579ad46b6b10f3fe16cb2d8c1a093008432e361b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7N2527507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a4e04a7af135fb80724181d82490368cc45e957247a73bded39907d790cf7e. 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/QZZ7N2527513.