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 0xdcac5e5e2c287cb993709d11cf8a4584154f3c1ce209cc9dae715d86fa728b39. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d1146bc-6b8d-4f6e-ae63-987d8bbb15ef.json and https://artists.proofprofile.net/proofs/artist/6d1146bc-6b8d-4f6e-ae63-987d8bbb15ef.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 0xabca0b6371b537b6e3a643472ef7b76362107a3d29b18a2954b125adf23e3c8b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GXBAV2501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a1065a4f0b53d846f96d4e37355b764b800646a19346b38f96cb992a4ecf4f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GXBAV2569398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8f7eb4dc27f42238312928e82494435074ac4f09069100737b3b892a583a7c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GXBAV2581063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2f056d41ddbf08c08332af016556216249af9ebbe225218a1b66aa1910c754. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXD7V2597745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081f6aac7487faa4942f04afe210dcdfe2b8a1329f0f27ebecd6fe23056ae52e. 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/GXD7V2591875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade1a308f8ab0c0bc231f8d661634442d7aad8be9c9f979ff294965c747f336. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXBAV2555605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8035c10eb57153196a212e2fd3f4be73bfdb7fe95f4770a8cccc472ac68f34ba. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GXBAV2562662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e47788c1e298aec244c5cfc56b0db26cb80ee2a58927eed643b0b1fc8e0c911. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXD7V2530395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601541d08212056ec60dc2c3417fa2f96f664a288793356ffedcf8208e54cf18. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GXD7V2581396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc27cdd29e5d8fe0fbdc77938623c5b0616839a4e4810809114fc28506c42935. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GXD7V2522673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9512239a39a95c5154e9312a23f30b18b7ee1b6d4800e3b4043220cfa79c75. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GXD7V2539902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1648522f311a992b7b6181100f18d2c06114b8dfd81d9fef5890986559aa25. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7V2585603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e313e27559da937f0a2b77af59c6396f4781085192f6aa36df30243b4fd94d6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7V2580357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838432b9ce849467a61f770f71b391fd4b822188d21f2b759789735378c2d6c1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXD7V2541395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe6d08d689d0ea74ae3dd97728ea29726ba0ab7c743dd60fd9d516966ae20a2. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GXD7V2545578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8209ea92e6910005e9df112020ce60305f249f94ff6343b582eb0f3a8ea39cb8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GXD7V2568829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fee4db4619dee0961e8d183d64ecf7f99852e98d3429e0745ae7e5d6eea7b4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7V2542835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cea23580bdfda6236700c2f02838fa42330947aeaab6135b39915ee17a35b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7V2589234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1ee5eb2720df49a67ec2e6af5d5530c70c80685038c3db61dd5605d65d9600. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GXD7V2579828.