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 0xf7819856217564c901f0a94c4e2fc7dade5726c63a80b5e588b85b5b90355435. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c71a9178-a90c-442e-80cf-bfc173d06974.json and https://artists.proofprofile.net/proofs/artist/c71a9178-a90c-442e-80cf-bfc173d06974.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 0x79f0bba779ccd13bbcbc85f2b3ecc38a6b33cfbfaf8e2f8b07a2287c82bb636f. 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/DEUM72303928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1eacdcecee427003664346c696ee8db77beac2853f8c89e00a3f90a12abfe6. 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/DEUM72200937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0a5888c41f6e7b469796b8b13d8ac78e74c138b46e34c5539693f26ac17141. 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/DEUM72310972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc707ad230cf09f9e4dc8ec52a13a364ea78bd9fe59016b31e3b76aa57333f600. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM72206312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5907a63c2f72fd0b05aa9e6394d680f9a139e99f135a93a5d0acd52220fdc6c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUM72119385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02704d62389f984d2093c20b74cf90d7f075aa9d482036dccc6ecf69635a41ed. 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/DEUM72310971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c44f924e7a3fe2458227d554f5fee2d8b2eb4d299c5bb1550b670703c845c85. 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/DEUM72203210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41882f885f9968352b327b91c1b13d532bcaba7d9385282657af930ab69b19a3. 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/DEUM72310970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8075cbfccb8b57990b6eea8638b888d34a1d4e13b1e6b98bb797263621d971. 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/DEUM72310968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edb32a65cf4ba8b24a90f79024f3647c77f18cb9984b748404b6e7e57ff2cf6. 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/DEUM72309625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77860f2f79cdd223ea8a6db5004a68f4a79099c001e1d9b79fe246e40bb5ad1f. 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/DEUM72310969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5907a63c2f72fd0b05aa9e6394d680f9a139e99f135a93a5d0acd52220fdc6c. 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/DEUM72119385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc707ad230cf09f9e4dc8ec52a13a364ea78bd9fe59016b31e3b76aa57333f600. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUM72206312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c44f924e7a3fe2458227d554f5fee2d8b2eb4d299c5bb1550b670703c845c85. 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/DEUM72203210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1eacdcecee427003664346c696ee8db77beac2853f8c89e00a3f90a12abfe6. 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/DEUM72200937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5907a63c2f72fd0b05aa9e6394d680f9a139e99f135a93a5d0acd52220fdc6c. 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/DEUM72119385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d99858af0ee68aa6904d63828388beb9264bae1b9191c9512155d8c9112ce89. 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/DEUM72117260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4133b6645065d4b35e28a5734c69111d6410ce15808c0948fa759b45a2927f. 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/DEUM72208051.