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 0x23660d39f9eb5d3db8bc8cf62f7340c1c270790fca901edee66b6b7350ecb09c. 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/bb415393-11c9-49c9-8701-f4cd977aa219.json and https://artists.proofprofile.net/proofs/artist/bb415393-11c9-49c9-8701-f4cd977aa219.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 0x8941b0dc7ea2a724012a1c10d8e25ba5c513c742ec25e33a23c265431cbc55bd. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BCOA72200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc353e1eb8196c350ee00f9832040da97f42a23faa7ccafd68118a56b67e30710. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BX79M2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a167b2722151cdeae73c5c39895cd790a86eb2ee90e83dbf53df525b59694. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BX79M2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d90152013e119bfceaf0a90c5181f001dbe6f67e40a4074bb64bef3d8a4d56e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BX79M2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3e03bc5d8624015f8a22d30975c7d68c74ba40c64feecd0bd40bda94b5e195. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX79M2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4206fe0980502cb62832f6cd0b71232ca1a4ac78e465dfcf2bfca1d7b6be95c0. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BX79M2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd71c877d604c9cb2832b0711dc614b66be0afaf237c856ddd3b5803526d9cee. 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/BX79M2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a60103eb41d451fa2ca20260959b8625e64c86ad814e7a907309cb9741e18f3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BX79M2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b552ba7688832b43265d4b805d1ac1fc454725cbfa895e1c19a59af58fc8e1. 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/BX79M2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1fa24277cf0b20af16df2a2557cdad39a60badb97996f633e0a81abd14f238. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX79M2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471939f75d9ac3b7c4824f2f8a557a5625b0bbaa104a64751787b5b245bd692. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BX79M2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdb101a22587a09c98327ae6b147383e845719bbe21fc4de6cb81a764f1b88c. 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/BX79M2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64f8c389756e5c0d8433e1f6eddcdd0f71b75f2b181af17155f2119bc1f3df0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BX79M2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797c52beea6f79f46667ec0333dac493c292076af3bb080d2ffb2b0c04951b37. 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/BXJPX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc353e1eb8196c350ee00f9832040da97f42a23faa7ccafd68118a56b67e30710. 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/BX79M2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a167b2722151cdeae73c5c39895cd790a86eb2ee90e83dbf53df525b59694. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX79M2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4206fe0980502cb62832f6cd0b71232ca1a4ac78e465dfcf2bfca1d7b6be95c0. 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/BX79M2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8726a694ca7fa035691001ae8c6b122a5983cea7748050720bf84c745de57aeb. 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/BX79M2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9b322ed4fedf51692b640023b1311827cbcad771564055d896c4e7604a5731. 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/BR3752100090.