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 0x488efcaa2d93413bddf75a5a332babd9584c44f2644568fa2537d3dd0f31000d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a39cbaa-8a26-4a11-bb57-6699be6178cc.json and https://artists.proofprofile.net/proofs/artist/1a39cbaa-8a26-4a11-bb57-6699be6178cc.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 0x7bf0edc7b3e527b927d7f3cf2487c819c61bbe55663c219d7e72904686953242. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPM2031244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa1b824b6346b60630a3f46c758576444b541e941505f9717d0d20f83c7a02. 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/TCJPM2031248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93440e718a626a9d9e504067ef8537775258f9ca96ecd091828ec8fed9b2828b. 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/TCJPP2162249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d91146ef70eea683758b0f0701b7c8d7c275291979e44c882ea61278fac76a4. 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/TCJPP2162252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab784eac60c058b012d4054cebdaa5af4f38e751e76770b53f88291427eb46d9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPP2162256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2036429441c998d8e73eafb0cc1b57e65ac0e09a2f90adf10e53f3c210c43d7c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPP2162258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8bce646f07bdf91f89adaa802784d472285c39db791d8cad8e3439981013fd. 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/TCJPP2162261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10354a264cd00471c69dd80118bf3c2373f81024d2841d053d5b02062da314eb. 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/TCJPQ2287837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df20fb12093be0fed47fe7f5fcb98cb3b041ff97494566995bff1cb89a6f934. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPQ2287075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884db710d682a0da922078475d7399ed8c425e6a18c766e18ece1ca20a53de35. 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/TCJPX2335252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2ac1e7417af6ffc5e582b700162db60b9d01552495edb474d942e86301bee0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPA2453141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8638eac73b4b9659bf73980af3d40f810c1817c03f06eacd28c54a192150d2d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:37Z), 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/JP92E2500548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc2f5c6af615ed8af13a203c35210c35b86630c26abc1271478efb9ae6f3c93. 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/QT66J2520085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741a4ab9708836a08f5de5468a7c7cba299a105de9941f8c55d8414c3a9a027b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT66J2520139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96af7e3b8b295fc08a35e60b5a951be348671cf906e99e5f22fba964d0d2551c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT66J2520102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a90901a1cb2fcb868cab166fef5d28b2b22e6fccf83d220fad152ee631b36fe. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QT66J2520148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c638e2d0fc875de76f8ba6e6ebc58fbdb789d7241b6fa80530cb4b9cbaca42. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT66J2520151.