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 0x91e38ad26461461ea9d143298c5222698d780b8eefdcd29bf4894c8a12cdeefb. 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/ae1b61c0-470f-42d0-8b71-5ddda97d90e2.json and https://artists.proofprofile.net/proofs/artist/ae1b61c0-470f-42d0-8b71-5ddda97d90e2.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 0x40afeda19590251a282dad011d0f796e56b33ab00619e6f15090f38dcb2259fb. 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/BRPGD7700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d42a55eb7ae970c4f2e24e5d561da4052791f9c4825db9ea40a8c6393802a8. 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/BRPGD7700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5af39fb6490424d3790c78e8658878bc7ef82a41a855cffe0e9ebf585ba4ce. 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/BRPGD7700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7205e7c7499c4116bdeeb8e0dfd64aca1ba9d065e756bd1ebbbcb4deb22fb47. 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/BRPGD7700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bad3598338fdb360fdd1e69d346a06661c8683db891846e32442dd987fbf5f3. 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/BRPGD7700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a554f518e69c494e6944eddfaf0aeb09bbaa781b73f442928e835286123ead. 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/BRPGD7700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e85c2826badf1ecbd8b212f94d02577ca5f68c4c85bcf67e26645523cc5bfd8. 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/BRPGD7700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8df9078418f2522907419c6760254d8bbb5a6aa874f75b651db9c3c8f50363c. 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/BRPGD7700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9547ca4a068c80117851f57112172a304f50ad7db97e3da939409ff1e4941. 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/BRPGD7700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c19f2b07921efaf0f2bbd28c5186a3c56bb0339cd6e57aa18d47406ea9595. 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/BRPGD7700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab3d260bafa7511168177b4871a59a35b33715d18ab5146c12814b6faa00c0. 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/BRPGD7700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8deb525e2f9c1ddf9884059c56b639d702d3f3d4a32a53eea55d2826289b4ce. 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/BRUM70600423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa288383b7a3edb0b17ac54e0c3e019b6165669d8014589abb2501bc58a9c037f. 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/BRUM70600424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450e3aec776e5396c1f63600d983e5a9f218ea0d45f8a27d4974c066bb50dbe8. 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/BRPGD8100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd69ad8943f14fa6b02677a53253cbef7e88a9662c8ab548818b5eb607f499. 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/BRPGD8100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40afeda19590251a282dad011d0f796e56b33ab00619e6f15090f38dcb2259fb. 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/BRPGD7700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac925ec22e5722c1dd3202cbaf9238fb215c1ce55865c7a5974b08f30a5b0722. 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/BRPGD8000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bad3598338fdb360fdd1e69d346a06661c8683db891846e32442dd987fbf5f3. 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/BRPGD7700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981f37dc22eb6f57599240e80bc3c87cf8263595ecb148a57fe126219a5609e7. 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/BRPGD8100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6692f95a085c674f02df8e406d883e49afc48296f326bcbd644a568d5800d4c. 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/BRPGD8100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f6f2db22f020a8cf1e64b7b37c7a205de7032309fa26a9370cb1fa0ab68d12. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRPGD8100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5af39fb6490424d3790c78e8658878bc7ef82a41a855cffe0e9ebf585ba4ce. 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/BRPGD7700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8fed2863cb669da0ae498e90d845de6392538154e2ce471ec110fa2dfb4a12. 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/BRCID9900268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc4fa55694902ff8884a43b9588d9055f139d34e2edc894f3e3c17921c0b752. 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/BRCID9900269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cddd945eb7c05a94709ccf6bfd482dae4fe877c9d3968df037b56b2a0663be6. 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/BRCID9900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe8b6f6a601b74335042a05b991311d948898122d516b421f5c62317df3b925. 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/BRCID9900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca23ea6691219add7ef21f81c845987ad8d1a423dc0e730a15afe4f6083df5b. 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/BRCID9900272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb660f18a581b81934a6fc53eafbda7cdcc3c87f9bf0d72853b9358de72b2b5a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BRCID9900276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac925ec22e5722c1dd3202cbaf9238fb215c1ce55865c7a5974b08f30a5b0722. 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/BRPGD8000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5f8feee11d97e5416d16be6726916b2917352d225067196ed6c172ddd500e8. 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/BXM2K1900040.