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 0xf8c703e271200ee33ba6607e138eea92d4fc677347eaaef1a822c121b6becd0c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a91fb246-68ac-4abf-9e94-35a5fcca5c57.json and https://artists.proofprofile.net/proofs/artist/a91fb246-68ac-4abf-9e94-35a5fcca5c57.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 0xec47940ce192a68f505e7291d11735c70275e79b6ea937e09fbe8def55165a8e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2403894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5960f6465fcb1bb1eb971dad7f775ca6838ea66a5eceda9c3a892f85006fea4d. 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/CA5KR2403895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda65c2602e6ee3db67d8aa3fe09d74b59a54a5254c937c99c3bd95fc49f9865. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2403897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87111fbe3591ef788d20d5c85819953a07ca735ac8da864170641002b89ee5fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2403899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6b002819fc36aa34a154aef62c115f320fb0fbe0ee36817ae13db3e0f57ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2403900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c534ee09118e6c14ed76abb15748d6403bef6166506b9447198d93fa404dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2403902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0e47f1c6e6505c9cfe51c82ab51c5ca6c120c1b8a8bd1a77f20d1473c29f3c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2403904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221510d1e5ae5cde9b469b2a1192a9697f46c38ce22b0ce0ef95047029ed19a. 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/CA5KR2403906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811cbf7628000140a7711dcf1e890c24a61bc9a9313862cd8c3e41c0d07b484b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUMSZ2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811cbf7628000140a7711dcf1e890c24a61bc9a9313862cd8c3e41c0d07b484b. 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/AUMSZ2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c7ee092b4246fdf0075204a451d4cff244db35e7d4304a51800d04a27d6024. 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/AUMSZ2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b98c171ad20f5a4cdc91b0f04b8d2fd0c2ee3aa1483e8b1d7daf1394bb6db88. 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/QZNWX2293662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3565b7b2a9864afe17d2e3c3d59b00fded1ac837355931bb6f1f9878b650572a. 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/AUXN22252519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7124ee7eaf52199db08afce90303a4016dbd296fe51e1cac3be2ce53b6b0bf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYW2024508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0984daffd5b34fb989d75ca869f1134b56b8d65b77dcc202eb61c602f6f8f332. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2436211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb8b59e0369ddb0fd2a7089d9197c63c07e48d9a2efe24f56cfc261cd9c254. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEQ2402176.