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 0xd7e8a5175b3d02530794530b98f808405396413d4bc14bc4561bd7bb4b1a098d. 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/304b4251-efdd-48ca-8a96-5d4c4eab7f20.json and https://artists.proofprofile.net/proofs/artist/304b4251-efdd-48ca-8a96-5d4c4eab7f20.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 0x48b311449ce9ec933d58b8987b58ac501d3f347e1ce5c8da8bb187545dfd75a5. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/GBEUE0901527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e67c8a456638edf0fb9fc6898296016a4093726ae909cc974c1351256c3b7b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBEUE0801394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d4e97f513ccdfbb2950600b2cf7267813e5d9086f8ea21925cff3c7cea4d8a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBEUE0801395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3725763530690c64534884b838b32164f9eef5f2c15dbfffc77e3dba24c25ca. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBEUE0801399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe268c4b55e126ca3b305d77ac0237ce8fbc07c288d542b731b7fc8b4a3710d8b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBEUE0801400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed37f1a9fe9f483a15d41da454db31cb0d4f4fc3c19f7ed41bed5d2aae029520. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBEUE0801402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74154738f5beae5de581e1a06827dbe70c11922dc5346de229af619f1ea9888c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBEUE1002100.
Un Canto a Mi Tierra - Cut Chemist Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4648c15750c16f75d44b108714f56a8ffa55ed8c43d85c38585dd2812e0f89. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBEUE1002103.
Un Canto a Mi Tierra - Cut Chemist Instrumental Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1414c7f1246cc6fe25a85252636a4722c9350ebcc2adf08d202d9a8431cd6400. 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/GBEUE1002105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74154738f5beae5de581e1a06827dbe70c11922dc5346de229af619f1ea9888c. 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/GBEUE1002100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf18140e47b160c402242957bff293bcc2f4d86df5a6e91bfd7e18e6ba3d78f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBEUE1002102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24991287945f5628624b59550a278d5dbffc03c7921de135d815b1cccca5cf0. 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/FR10S1833032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d462df79306d386e0ad264bf740c32a0d64838950a3108ecd741ef973bb1dc. 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/FR10S1833024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c5ee12dfcac3dc4f29f558c109d257a7bc47bceee46b26a3f781bcc3fe64c3. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/FR10S1833037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e67c8a456638edf0fb9fc6898296016a4093726ae909cc974c1351256c3b7b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBEUE0801394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62c4f7276669f2ccd32f296036a6bb34d711f5e6e16bbf9356dbbf82e6297c3. 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/GBEUE0801396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b305ed31549cd8a709603f39948ffe0ce6be174f90b678275a7a0c785fcaad. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBEUE0901412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c33322ae9a6a02525286f58d154d4fa45689f534486d7d4cdcb4ffafc1cec. 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/GBEUE0901607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd365aafff217a8b64c483612146d945f8c5bfc5287ab4abd04a1f1516637223b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBEUE0901528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf18140e47b160c402242957bff293bcc2f4d86df5a6e91bfd7e18e6ba3d78f1. 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/GBEUE1002102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775570073c5e33ceacaa6a2b5aa3f20942c4e21089bf1abb0ddfe4840c179a7c. 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/FRU701800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298f97381013b0b1583f37c3c913d80c50ffaa30e6432df5bef11446a0cd4a0a. 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/GBEUE0801397.