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 0x8098724d971093defbeaf6746739847cd905c5ae37328a68d05789f78f6d1b9c. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b876f997-09ea-4777-bceb-01de7f409f7f.json and https://artists.proofprofile.net/proofs/artist/b876f997-09ea-4777-bceb-01de7f409f7f.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 0x426805fe37091426cac4fd416d3f53e438192f131e4bd1a886ec7fa7d6be2620. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAHK2342472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663db22aadf6a67ce580d85b48b271c495aaf733a2e707c40f70bccfbd9c897. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:32Z), 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/TCAHN2310293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a1f96b705ed9c8b558fb1c81e3c08b5fe93a1b2ec16d646aaa9a8bcffae37. 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/TCAHN2385634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdc6d01a3b7818e1d8d5b66122dad5f9dfb754d15763b797611fa8b050c6a52. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAHO2382248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7b264ac2268323e2771b851ca2b11eabdb89edb61dda6fdb70df617c1ac0ee. 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/TCAHO2382373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e785b8f60d98eca4a4a55070c72381ebf4173e99a4ca51da5571c8745e1114e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAHX2412878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eb1e559c91d85e823a6806bcb7c4cbe9235674fa14dcf5102c6e83c25e09bd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAIL2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc70811ea462b97cdd731446cd8e387c0dd128e6c1ecdebcb8bc76ce13563b0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJD2445285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f7c3ff4a07b4da33b42d9aa3b521ec77cc2286cb4e8e9b6130c6a46f6c04e0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:54Z), 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/TCAJI2593684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e427eb4a018e564ce48214040aee198c14ae7764145cef6252cd6ccbd2e1fc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJO2590981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dc9de490452239aa7eb01e523296e26a32993c0020fb94381d943118c60d51. 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/TCAJQ2578526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fe7cf3c7edffec6f3dfe4722cdd1c668958005391394d6403313135c472e70. 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/TCAJQ2579259.