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 0xb59890abbbb7cafeba832e934ef0822af0437c575b56debe4e6d5a0d6baada0d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ca86cf4-baf1-4474-8c84-f560c43f0c4d.json and https://artists.proofprofile.net/proofs/artist/2ca86cf4-baf1-4474-8c84-f560c43f0c4d.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 0x8de4c556f24c45c817a1c17fd04943c101cce931759049e7a944cfba79f43ee3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCACI1507324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c61d24da3f11343af28b8fcba4e024ebbadc2de05dacb18d61a8715f322578. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:30Z), 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/TCACI1507332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b5985f69d0b6f3477e79836a70c7a3b5e1d5179b642197e565982cd00d76d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACI1507335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b2ee4df5e557f15bbfb5c91b18d3cdc86cdcefbc35057c7c3a0728be76dccd. 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/TCADN1833282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a89a4fc6e0526782d8184414e92842c95449b4b9e059c1a0d2e03c3c05f415. 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/TCADN1833287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1ec653e0260582c0a929e710be18088f891d0a0943655b5c7722361af2d0bc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAEH1903132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3872ff1f04177b7a78d55284d565e2655611af6e3676a926fed8a0241f0636. 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/TCAEK1964700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b9d5e4baf8e9ae471b623f4f6d5e8efdf520211f7a732e1f53b387c9609adc. 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/SKG152200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf8e45996d09d4b863cc731733a159b2a7991d570e23783c0b6b101bf623215. 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/SKG451500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53c8632707e11d40a2a6e3e1e58a5067eed510b50c3c80877752e54f12f1fff. 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/QZHN72167172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53c8632707e11d40a2a6e3e1e58a5067eed510b50c3c80877752e54f12f1fff. 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/QZHN72167172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a9f1b974f7ca217db537e57fbb709b0eed044d5449bc45658af92f5a25aa1d. 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/QZWDW2391331.