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 0xc8f8660c3aaa00a45690bb09a6e2890a39d46b7f34e970de39711c9770f19918. 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/60317d5d-8cab-42dd-a867-d10b2d985ff2.json and https://artists.proofprofile.net/proofs/artist/60317d5d-8cab-42dd-a867-d10b2d985ff2.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 0xdeccce071b5fbc1f840666fe48e9d7ab96a8d1e09955444b0a8b885be476cb9a. 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/QZFZ52027159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b15d98b344e5628872601f56d94afe2a305054bb28948f9fdd002566401c81c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2283006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a91d0e557b0cb525629b77ff25f7ad8490e644b94d8bc1658e6ae969f4b6a. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNWV2301403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9366ed2c72942d30113b7aa6fa73fa627ac96182985030072ec3dd3e0ec8a477. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZRP52382473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1536aa385eb27cfa9678d991f161ebf7be17ac815d623c1a13b1bde0f67527. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:34Z), 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/QZTBB2320034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447d987e150e2ac2608550b6dbedfcbd052d01983ecc99f368c42e0d4d6967b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFN2379312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbcc2a8b9ebae02dc05f338f7e1b9da737f23b84ae9c962610f82d2088c1cfe. 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/QZPLR2497038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33503d7cb08ae244e7022c50d81e8a6ce6a69ece6199151d8879acc3b4eff74a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFN2461378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595198454c88d95a1e046043e513cef51ec448266c3210c286dbad584689d25d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:27Z), 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/QZZ7V2499696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469eee5f78eb8ac2f99145186ea336cf4d8a708b104ae6036373ad35de78010a. 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/QZZ7V2499697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0735b7689efb174bc4239430545c64c936dd2fc6f09eb9475003047854e1aa43. 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/QZZ7V2499698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2669189533a8282abf96b8327c0991461dc12204b3f05209180539de98c98b2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7V2499700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449d4b33be77d75a93c32ecf11daaa8982979350dde7c8196723a2c9a57dfc38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEM2568934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb297d9d6022ab6e81d8c6af9dcdf2784d608bb273048579089be6d07d08051. 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/QZFZ32574255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aaef28ebe7e84fc153e41f076e1061d57dbe6abf97f48610499a07e9bdbc72. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/AUMEV2404447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaa2b88a551c0209fa82c7b6e0831ae2d180867f69d6638bac9f80e3080871d. 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/QZHNB2471066.