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 0xb902360c08d042d1ecda4ebc10bcb10836bfbaa94559fb5eb1c5ce9add175d3a. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1316682-b1df-4ee1-b391-5a6c74285b4c.json and https://artists.proofprofile.net/proofs/artist/f1316682-b1df-4ee1-b391-5a6c74285b4c.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 0x840fb751d80d9b842f4a3b6f57eb232e9a4582e9465b8339aef9dcb16a2c4632. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6J2360024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29334bde3e8f3b8d7158c0abbae56125e8ea5a4734b1829c4f4ff6e72cd5e058. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZK6F2381127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dabf60a3ea8bce93b0b300b116b1e6cad26940cc72a02c64ae964d14ad3268. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEP2325488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7171562b2863ead4123032cbc8929e46be90fa0a20eef1a70599e5528b8029. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMEP2326535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc74bf72189f4ba9b3255c50c9e4ac7942604ef749ad097e0dc487a780f02a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:41:07Z), 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/QZNWT2398711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff19dfa730f5fca01cfd9cd6c4bfc7676dffe393a2d9b682a26669cef1bb0f7e. 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/QZNWU2300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133f5c4c4f92b45881b5c8cc7eddd43eb9ed4c2e51bb8484a81beec2849b26ab. 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/QZNWU2302673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2594f7fa967a9ca7c07a1634c836536271da172a1e63adac30e4bf85a9e240. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:43Z), 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/QZNWU2302674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8973502b35d0bc2ff6bb066103ffce811dff59a3ef50a7b35d266a52e0336226. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWU2302676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21127ec4f42c31a9d9a38193bacee831e4cb283ffe71bca629849a4fc313472b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWU2302677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c98629ca7f4282303056c3b24adae1bff31287ae55909cf68ec73e1d9b343. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWU2302678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7661f491522120f18fb94feace56414bf96aefa0d3ed790fae4dad91e000f9e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWU2302679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccee86e25378111144370f709e66ddec86598ded1acf3758140409d37fbd823. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:16Z), 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/QZNWU2302680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc74bf72189f4ba9b3255c50c9e4ac7942604ef749ad097e0dc487a780f02a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:05Z), 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/QZNWT2398711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff19dfa730f5fca01cfd9cd6c4bfc7676dffe393a2d9b682a26669cef1bb0f7e. 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/QZNWU2300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24777161d66a81f443d3cc73c9c4954dc78d33f857b3605b796e688d626cfb4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWU2302682.