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 0x9505bf0a55dc535ddbe8194cb94920e8aafe1ac79811e74a22cf68105672f823. 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/187f2d86-2415-4d8c-8f28-5de7a58d045f.json and https://artists.proofprofile.net/proofs/artist/187f2d86-2415-4d8c-8f28-5de7a58d045f.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 0x14870425f9900f96f2e625847c5d83975afa2ebef27f4515fe7c18d2dde7966d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX451574630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6914f2dfff56fc88c2d3acf02009c3b18e4fc91ba4b76ee9b6ce1636dc7cf17c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRX451574632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092ddefe5f9b310f500903e97fa033e36c9014f9396f9fa990881e4b0129ed52. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX451574633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d66c7b3d41f9f65248b77ee9d57a97d808ce9392feae93527e4ddc37238889. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRX451574634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57103f0817b687f4f8f63a1cff352ca7969fd943ec37d4c484236393b6a0d22. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX451574637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f72ac0aaef7a830fd26608c4d2f9ac847e493df25bc048701ca1d324c208864. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FRX451574638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ae52125a84f792ffe3b4c5c581c918d63cf7fb9bf0d488f15dc59f5be53048. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX451570948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34dd05b8fd0a70b79a1d7baefe5df9aac3d95119a446b0980e7a60b17665186. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX451570950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628b2df5b5bf1f234dd633421cf92929e8a45941ebd1107b18eda0eb4ceafbf2. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/FR59R1902735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790224cb63894a015011459c97a067e50db76bfb3306e9789c9fc3cdbadd6152. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4R2164919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff525d8791819a97df69550e9b8a58ab1ab1844648a7d5fdcded5066e75b869. 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/ARIXB2501606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89f92a67f4664e49183b88cd7cc045e326f55d90897444c8946d0a3d7b0888f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/COAF42393241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89f92a67f4664e49183b88cd7cc045e326f55d90897444c8946d0a3d7b0888f. 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/COAF42393241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092ddefe5f9b310f500903e97fa033e36c9014f9396f9fa990881e4b0129ed52. 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/FRX451574633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9fdc30b141ed5caececf935fb16e9cb31fce357dc49c87a15b76fd733f150c. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FRX451574627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34dd05b8fd0a70b79a1d7baefe5df9aac3d95119a446b0980e7a60b17665186. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRX451570950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf3c4b58f8f129f4a18b18400f85a6f7f2cf85069bad48d3c5c4f4a4644ac97. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX451570939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57103f0817b687f4f8f63a1cff352ca7969fd943ec37d4c484236393b6a0d22. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FRX451574637.