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 0x28e44b1d4dacebed10d7b08985df39cd6c5091cb895e531504356f8939c0e6f4. 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/6de4c620-f0ce-4c89-9039-75ec4dd9674f.json and https://artists.proofprofile.net/proofs/artist/6de4c620-f0ce-4c89-9039-75ec4dd9674f.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 0x181366f0bb4e9678b920f6a49daf206675030acaf7392eb180b0d7135de927cf. 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/TCAHC2394716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6fe3e549488a162ad3329a915b06b3e55f8e8fe0047a14102c34f78ebf11b5. 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/TCAHC2394699.
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 0x9f64501eab8ec46a3962a7defa5c988626af6d7c0979c19ed0dd49d4463e43e6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAHC2394707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f7b65cbd92d273d14f265f4c607d623f575cf2bca5f6a87923c9b91d5c4a40. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCAHC2394711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ddf91d6ea887beeaf29688c8c42f9f3a2d75284ac3a3471f6a4ee348030523. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAHC2394720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cfa88741ac9075e52d7d3fbcc647d15e46bb850cd9f3c6de458fe4551c8892. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAHC2394735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa701ad7b2038b2048271ddfd0f11eefd46f1254687cc8d3f592f8c92252ba141. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHW2499679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b86ffe2386d00dcce31d70c05e77a61edb31e3c34611faadbb2e2810ef0fb3d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:19:02Z), 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/TCAIE2478187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4c8bf802fe78ffd00e12a662f6093ef17bc6b236cd51af56f3c4e8543d7451. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:38:32Z), 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/TCAIH2446977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca54294d98cb8ec22d76dfa0df0ef1d7935206440b68d6e5909bdaab98777921. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAII2473374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8ba94f39a3446a0edde2d00f718c6013eca4e6acbbe98135fb982b251a460. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAII2479865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640a80b2f5a1162acb9f7d786d05fbd5f713fc786050655f409dd00230e22e70. 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/TCAIM2488736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205140927693f0c75feb3727c821b98e7f5f98439d62f333269b52fc47fc19d0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAIP2433045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcd3cc300fd116f5b3a24ec2e44be110d0087e49df619dde3485de7fedc4c07. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAIP2475815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb98b1c7675df15f572d1e3e38bc7b2fa86c0316af9c8130c5d945f62dcc49. 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/TCAIU2450946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d6bdd7870a5be10a2ecc1007ed042284f187c6822b4c6d20b42f2329a6667. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAIX2475225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb2dc6e5a59a66060d5595a02facfae21b3739fa20a3af72dda63df8b0e6b68. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIZ2458961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf5be26024ee6a8fccfabd5aeded3dc59cea6b9c262c9b965fe14067e41b88e. 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/TCAIX2475578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a46f40d075f535334c985a1f73b8ab46650c51f67176c933c0d1fd0ae56f07. 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/TCAJD2594664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d66da1cf392088365e95b2814081898d764a3bc075c3b6cb467880b7aaa2ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJD2594567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bdb2e5b2917c967a31d55ef788ab33c5f4d43035cc98b20f69a30a82245335. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJJ2524184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dc9b2cb0b3243942a7aa3946c07cf64221c3bffacc17ceed4627c384be3eba. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJI2582239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1501fed92c154025992bbee1b0ff055553a6e0be3d8d84fdb3a91a68715060c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEP2570110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04dfd8a66c9893f9e225538c3c589461c00ddfa8de3fa04abc090a2e03a6724. 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/QZNWQ2553036.