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 0x76d7c39f944ee6e2bf2362735b7e46c74377d723b53511a5bdda4c427ad40e65. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a537d67-7b54-4984-98f1-2ab4bb23e573.json and https://artists.proofprofile.net/proofs/artist/1a537d67-7b54-4984-98f1-2ab4bb23e573.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 0x6770531859b66896060f6e005a5a161f33f70cd9ea059669855e25adb976f04e. 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/DGA062314964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2146bb1d41cdb121c7e9fbb01d42c42b901826eb10cda11b234242cddba049. 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/FR26V2044160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61789896a482e193662e89d060e80a253a22b60dae23d049ca282098994925bd. 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/DGA062314958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5805b67b5c5b2dcd793ce8e479433f5df8a0a3dfd7507dbe5202f1fa70bf957b. 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/DGA062314950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa35e2be06f204c1b1ad55d2b6375986377fbc9b9b090aace3c6788b277bd0d. 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/DGA062314952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a3cfa51a161c39bb8c44a6e3caf082380f52ed1372cc3043e9c3c7778fffe0. 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/DGA062314953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b076a57092c45c580af2c74173ec532a7e22a5a5c6809acaaab2fe1b1b7b19. 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/DGA062314954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6df7149e84e7980dfee49ecd04727ef34d9a6f75f49321b1c957f08f68420e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA062314961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbaafe897b713a64a09e5aa431fcfdd27e639039f7e183804553031a6657f09. 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/DGA062314963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ea2fd6bf3368d236bb1d961b92684f20a678269b8a2010a93ecb44ac5288b7. 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/FR96X1990415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad6d24cbd3f830fe79afd186aa0ccf1f456895b5934bf148e0e24e29164dddf. 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/FR96X1990414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2146bb1d41cdb121c7e9fbb01d42c42b901826eb10cda11b234242cddba049. 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/FR26V2044160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6df7149e84e7980dfee49ecd04727ef34d9a6f75f49321b1c957f08f68420e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA062314961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad6d24cbd3f830fe79afd186aa0ccf1f456895b5934bf148e0e24e29164dddf. 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/FR96X1990414.