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 0x34f6a7a7a13a200760cfb2a10f096d01c8c0a72d93683a37f1a13c7fe922ff61. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c99e2f6b-d760-474a-99d6-4ab44c61f640.json and https://artists.proofprofile.net/proofs/artist/c99e2f6b-d760-474a-99d6-4ab44c61f640.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 0xdaf31ae08d91fd0f1d146eb35079d48a4e18ac278e9ce8319ae8d6d849c3a509. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZNWY2430408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb409ec2529cbc806db54bdae2d98c4aedd43c85f4823affe198d2c9eb666d1. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTAZ2426701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79766b2053f214674e3b44feb426090cff6a6ebd96dc92c0391b819c9188667. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZPLS2434719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cf14ae9364af07913d470f62911edbbb6d4eed1131ca34f595cfd8703da82c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZTAT2425641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75ee4de4f73af3c02c0a7475771161466e646ec2f5331cc620b078d6f0ab04e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNWY2487282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb6292859fd1fd08df56a3392118c9273e94c14de4bdb4a6975a49eef77c6e7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES72562763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845d5facc4e9bc89fd0d46040c49c765d5ca1343329124700189f45571749d15. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFX2461075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696af633fd70dd53ee57713a66e3639be8b4ce5cb752e10bc979d6a611d5962. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDA82596150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bfbfe3b63bf8809c8bf3cf613af788babb763e5b2bb1d5b28e2376a1f26d55. 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/QZES82595866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e3f62c82c8eb29951a4a1a05baec910bbb6c6e265d2f830f90720ecdd6e701. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES92505651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f0932d75d2d5a5e2b770c847fbfb066ce9efc06008515ce6def0be1d8e8ff2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZES62508772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fd206e6af9038aede05f0ec68237eadfd37aeb136e774a0c79c5dc9083f178. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPLS2426462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01044b3533f619e2590a62cad0fcdf0c96020fb09fa65b6f3753e64124b49c32. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFU2486195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ddfa27aa0dec0d8db82d4207d8d427fa76c2243a7791a6bd4a41f787b4cb36. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZWFW2421626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d6de4bfd329eda341e3daa2a54b91da7758e4ae92457a6003b5af2bbc5ad9a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:49:07Z), 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/QZES72545255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c28fe83fc4ae290328a723f6a974e5474d901af2dda8fbc72a0c3fa7dba2529. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZNWY2490126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f6f41905978dde05d8d6961f0769d977b9fd84ca98231cc8d8c4df9714cc99. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZTAT2428626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2265e7b793d75d485e2b307df093eac2fd5b5bf4076bac0d2b53d7b52eb7962. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZWFU2482797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef65998aca126b2d7b32b706fbc0089cffc151a6dd0bd9b0faba1080b2042b1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:18Z), 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/QZDA82597414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90f7bcf47f09b3803f73f5738a8d86421850446fe32463f678fd81ab7ce60d6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:20Z), 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/QZES62508774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156a9e7591e0b623d2b008eddbad67372d5b18481378d7979963e6bf2d721c4b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES72543005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc3450b7e97ac3c909ebc83bcdce17e4d17639aa0309432492d5b168960b506. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES82593350.