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 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 0x798c8fb8cfa72bfe116e2cadd14344a0a1beecbc8a11fb2671ec6c5fef2dfa84. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f79f4324-2a4b-433d-97b5-fcf550838ae3.json and https://artists.proofprofile.net/proofs/artist/f79f4324-2a4b-433d-97b5-fcf550838ae3.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 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 0x32556671b4af58c8a8bbe1f5cc801071c08144044527be487ded45ae57099559. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLMA20900002.
Me Myself and I (Prod by Perry Mystique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca1ca5ad607fd971b454fc4b78fe7148c764804763706e4d9f8d5ce2fc1ce67. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLMA21100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa8d3d5e98baaa832f215c65d58be5258f8c73b6336716d46e912b1955815b6. 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/NLMA21200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff4c61579c81f420be993937148b4b4bbaa9e659efe448df5325585d9c68086. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/NLW2R1709338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb4f4d32be6dde9668c23113d67178fa4445d83e1cf6f2b2cae03a69d909518. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLK2U1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc41c280d812c2c847ca1f9b8feb2239374289fc01c9ef579290f551c3b76e2. 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/NLK2U1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4df42ed9e287d80786b31db0878592f37f4ae860543229af8cf7680e444fd31. 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/NLK2U1700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c1ec692b9e9c8b91b3649e9622f7fe20eac1b4613e39d6052309d4aef5a6f6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/NLV2L1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c54ee5eb5bc5efb31584b0e6732dd91a8be3a87fbf4c1763a4d174ba69e1bc4. 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/NLZ9L1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedbb9de10d4ee13c9652ea00b6ca8c611b56fb807bf62260d815bca285b5edd. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/NLR1T2000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236affc64d176937ebac3be781e26eddae0bedcf44e225c4b9622e7584cf5911. 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/NLR1T2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3638249b6ed3129151400be3ed80a919a372bbdac718c407d967f229f84ef6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a26b28121361ec576c54e223d7722c034f5ddcc7f0bac0b4577a6db85d659a. 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/TCAFU2192109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22193aee695b4a748176d734ac1aac54622d531383b106af226e3fb15519ffdc. 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/NLQ4B1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f9a2966ef1f4eec8a8bf43b882cc2262395636933504dc23c5f08b8bb4a0e6. 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/TCADO1838408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6bf71ae317068152198643b48a153ca58dbaa27fa29604d44e697e1f4536db. 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/NLAM41900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3679ac51a65aad144453256c384999999c241e1a58674915d640499eef4b079f. 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/NLR9F1800001.