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 0x032c01aa929127c9240a1cb062f354449cc1d539b5145154fedb9b890162f0cd. 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/ee4ecbac-be8d-4ec3-9ed6-72a149ef9e16.json and https://artists.proofprofile.net/proofs/artist/ee4ecbac-be8d-4ec3-9ed6-72a149ef9e16.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 0x5bc9112722a71f832cbf8ccb293f7bcc4b6e6069582431b1e3da77a1e5a087e0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/BGA471921728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55babad51ecfd8e718d83b5c8e2f1db8ebd5b183144d7bb50b5d3505284b7bbd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BGA471921737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427bfe45e63702ee9330cd646384a811822887d7d128c7bd349fb576384c3bc4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BGA472020695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1ffd0239b205bba690c947d2fbe84cc5fdfa64bdb771e18b9e78e6e51fa714. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BGA472020702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20005f086123cc5f90a16f335c5a9ae3d627a325c1b22f3a2ed1916f479b8a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BGA472020704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc361e818c226137aa1985d538ba2618c274ca9458fbeb003770fec0629402. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BGA472020697.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae2103d4b43f2c0ff84868e7ad8eae3df5409fc014d33b8d4f36ccc0ba48223. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BGA472020699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f29a076d9700e8b915be91519b39f624c58f55322bad410bc0e5e57ad7c5ee. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BGA472020700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26de3a27f8ab38aa5af622a613563b48588bac34a490fa7b9aa91ac4d566e16e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BGA472020703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03df29c539095bd54a050ae938afb2b3b1521397fa3811edc5a72b772a61144. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BGA472020706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff55a61b986809d42f6a84fbdf1fc7cfb82d45a8aa1fc72063dbb693f192a33. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BGA472020711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ca01c34c374bddd38e66812b37bcc300969837ad184342a508b5dcfab464fa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BGA472205450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa372deac76802c22126d90cb4c5723d89f34fc05094de4777ffee086804bfe19. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BGA472205457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf54345165d0fa43ed03859d49f92c78de7eccd9f7b2cac4c20a6e2968d0cf1e. 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/BGA471910911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2127b2f1684eb3958624b703ec129cdac2f6d94925dd79c5b87fda9d3b09d340. 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/BGA471910912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f1024e5f1882ac5770580d584d43ca2c19d50de2f9b7f275f25c6809c63560. 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/BGA471910913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a672de4169a281d4a5351b3428805bdf51ddcd049c943f8f06c0a1c88b45f65. 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/BGA471910914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27fa00640a62de8d871721f5f5e7678e7f0d94e2a33afab9321ecee2d3ba15a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BGA471910915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158b0987ee56b1e301196cd30d448e307c09c62d50855d0bc7c43c9f16d5e347. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BGA471910916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8738a8874922d375d42270882b38b48ce92a034f1b99a37bf0d87779423fe8e. 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/BGA471910917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23bb42529a7a8ce462a4844f4e62cffc7d9a0cb4a916ed17a0262eceb5e9296. 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/BGA471910918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe076b5ab4ddcdfc8dbb721fd00983b20f3f374ac89ccf264b9b8b308b5af34. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BGA471910919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe691dbadf6629f393c8ea12e6d81e7fdff2fc78604b91beb76ba1eedfa2f22a8. 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/BGA471910920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a8b17a1e5bab8801cf02ba07067ad73e498dac26010456dfdc9c72ef0870d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BGA472205454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d6b140777f1a6863e7a46b61db34515429397cd8d799cddb02d7e8fef99198. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BGA472205455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d1fd163655048e108feee5960afae1a8afc114cbfcf23c5c21371f7c2da892. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BGA472205456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dbb326b5e1c5874a0c236cb277f61b221261274a72a8a13ee2c15c6e865df2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BGA472205459.