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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13030b3e97644acca10b2d4505bfa337a48f97d7c5d0ebaa7e83cb3c823766b3. 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/6126a56c-dc62-4cde-b388-8eabd8f07e59.json and https://artists.proofprofile.net/proofs/artist/6126a56c-dc62-4cde-b388-8eabd8f07e59.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d38d8e1fa8b7ad694d00f68a43cff70cf84832ad6c5e1597b9d522f9865ffa. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:45Z), 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/DETR91700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfca1f44d14b06d617c40d5ecdaa2ed84bb0845747d19be9f6bc13b6ce18c69a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:36Z), 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/DETR91700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7bd26d893821f13077979ac8f4c32313c87e3816207170cf032db64539ac78. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DETR91700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c15d885ec27071ac8514a876725a66f9dd019d124a6a31c600316d2f183bb0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DETR91700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee72e145c093455f807fe84fe6bcd053417bd1c7d7cc331341c9eb2fac7455d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DETR91700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d184bd2e81f6670dc03f3b80103dc01bc2e6c537951cc4f98fe2f1e9a1c0140. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:16Z), 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/DEZ902000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e220dbec1a377ab9599bd26c347096cbff0020bf290fab533b7efce7100d74e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZ902000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5ddea79cf4291ea95c837a8bb3ced1d5fd22cf5bb8a5e320b8a78642d8cdba. 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/DEZ902000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b88234b5f56ef3620d6b209b8dffb8926021f1f8830817a87c1acdd12809e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0P2450782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19fc5a15d826b9630f01b30a3184d4c258b881d183aa5a31e82fc10a73f8d2. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/DEPI82522755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb314ce0895d6b785e707a326fb0a1cd251738bc6a704d654eb9918e42ff50aa2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DE1QW2500925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b88234b5f56ef3620d6b209b8dffb8926021f1f8830817a87c1acdd12809e. 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/DGA0P2450782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f7e88c6614f2aeabffa7a6524f7d30e8e4edc83aa7ee48e3234de3c673ab3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DE1QW2500916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2195202ae6a796087e4ab3cecddd6ea3ef59f5d984029c4784d8a9d60259f2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:37:24Z), 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/DE1QW2500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19fc5a15d826b9630f01b30a3184d4c258b881d183aa5a31e82fc10a73f8d2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEPI82522755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff66273526d306ea7a24f33a9c89a0afcc75dcf32c957bd5a6969a0e3398fea5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:45Z), 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/DE1QW2500918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c23cbd0b811fc99cd16c12dcaee5a0882bec6ec7fe0d920baf93f3b6b807c8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DE1QW2500919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963ba7cdb2bec08b47fca7ba75f98eedaee0e1dc79a76ebdec3a72ad0ae920af. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:29Z), 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/DE1QW2500920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09a71dfff698caa142678f6f4160496af550447819d38cb8defa2be116d375a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:37Z), 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/DE1QW2500921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf643e2b1fdbc9d9de8b66ebef5bdfc0409d0699fccfae32ad022bc1ecc29309. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DE1QW2500922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd81e15e4f1db89780c8f754a360944244b7795e61079c3e6fc354f1bde8ecea. 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/DE1QW2500924.