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 0x027a4ceb403c1575c4ef25c802fdef956d8bd79582b501deb2521ed0320f0292. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9090977-88fe-4aba-b8c2-b1fa6bb3aa21.json and https://artists.proofprofile.net/proofs/artist/e9090977-88fe-4aba-b8c2-b1fa6bb3aa21.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 0x50c30c0ced5b30fee61208b8ddb87cbd0b6b32b96318745d7fdbe07c4585f229. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:18:56Z), 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/DEG931912719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f37ec5660600fe03eccabf6f62c648ec63db699a5149f7e5d28e90f1c43824. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEG931912720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe037144d49131a68f5934982990f675a41d5da4758751cbf3d2dc8b19ea447f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEG931912721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef036516a01024569cb23c173b51a47552ec4c50cc72eba5ae28e974bff34be. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEG931912722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2f18fb0cb44e47056858bc91c01033a8f4fa887231f909811b335a9b34df57. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEG931912723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3744f3b96f5c23f784db2cc8b33d1a6ebfeb33067f1c320f8fba627ed25c6d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEG931912724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810f299a723ca279951bb91c70719ea9eb59b510d041719d7dde90bf0ad7446f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931912725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d7b434e8c3df87da9377de7d884ce2c4cdd1dc310c49bcfd51886ec90fc8f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEG931912726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736528a995baf3091b4d33029be75527032f870f9c5c2f56d8c613b8821a9986. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEG931912728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7f4ef078fe548653e092c67ff000871b7f42bed200387d9262c1fe5d97f467. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEG931912729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2636021a782bfaea6707d490da636ba906209253962e59713e9eedb457ce4c. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/DEG931912730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d7128a60d0bcef6f3fc7fd9ae2a7d06c1ef51812e20bd38a39ee91dc3199be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931912731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcfdc632ab054455be0b00b046e208abd4c499dd1791e9c26213a17a47ecb55. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEG932404233.