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 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 0x80dd0d8bdca5c8c890aad85946b41324cd735bc55b555de5b30514469d043216. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51927467-e6f9-4af6-8304-433bedd59201.json and https://artists.proofprofile.net/proofs/artist/51927467-e6f9-4af6-8304-433bedd59201.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 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 0x81ea0bef72caa34b30fd8fc34d4ccd2a1e6a23346752488929b22f47c918d0de. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE6XY2299882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5988ef305a7356eb57fbfd76a4cd1b4c0bea85152f93f6cb8a128431f40af307. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd41021aee927f40b18f5f5a42decd945a9796f7e8e1414e64c3b0650f1d94a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6HN2209749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e559bdece734648c2f2b60981880f546b11d8bbc2e37dee559411a31b95708. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cf433e0d0488181a317f7b54836720641b351253ecf666e25df4d01d2ac9f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60bc580251d9795fda99be410b1e520aeffdfbe51671fd4873d72479bada226. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b804f3cb4426b123eeceec2adb5d07fc0198b5a81e5fd8d4c42c406e3310300. 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/SE6SA2215585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a1122dcabcc9e7fc5b406f3ec5a0b8f431ac25067f4081328da801b70e7397. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdd529c384a2d6f37958606e0247d1e3965ddf01bafeafe2ae546b917d8679f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f920c9a7440438377f7b4096674c7ba4bac1c9ee04299e471b33568fcaa8b3. 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/SE6XY2299889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb472d88bf02cf3a3e6e27aea0c0024da621dcb7ba4c2ff8ba720bf6300a8fd3f. 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/SE6XW2315766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b21696161f30f7fbe7d89f89c5cec42b81af6dd6536c15523eed115aa96d8ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XW2302112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d691bb2d1d110ed9439c4f4260d388da3b8c56afd94da297b2055ef2b80d458. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XY2332542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b99c2760e983aad3d59d513eb84030fef3a9f514f052e901b875d4d43c7258. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6TI2383412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa3311b3d03f6002d8e09efe9522528fe4cb6b21d5062b612abc2baf754ce0b. 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/SE6XW2324040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03ae7278ef58169f4b1f39de192364eb5800e3d0b81ad56279a70aab1d34765. 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/SE6TI2360766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1843156d9b799046d1c7f698bd3f229bc6517bfe1542925c7f601a319b22f13. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE6TI2391210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ea0bef72caa34b30fd8fc34d4ccd2a1e6a23346752488929b22f47c918d0de. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE6XY2299882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5988ef305a7356eb57fbfd76a4cd1b4c0bea85152f93f6cb8a128431f40af307. 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/SE6XY2299883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd41021aee927f40b18f5f5a42decd945a9796f7e8e1414e64c3b0650f1d94a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6HN2209749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e559bdece734648c2f2b60981880f546b11d8bbc2e37dee559411a31b95708. 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/SE6XY2299884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cf433e0d0488181a317f7b54836720641b351253ecf666e25df4d01d2ac9f0. 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/SE6XY2299885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60bc580251d9795fda99be410b1e520aeffdfbe51671fd4873d72479bada226. 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/SE6XY2299886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b804f3cb4426b123eeceec2adb5d07fc0198b5a81e5fd8d4c42c406e3310300. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6SA2215585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a1122dcabcc9e7fc5b406f3ec5a0b8f431ac25067f4081328da801b70e7397. 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/SE6XY2299887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdd529c384a2d6f37958606e0247d1e3965ddf01bafeafe2ae546b917d8679f. 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/SE6XY2299888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f920c9a7440438377f7b4096674c7ba4bac1c9ee04299e471b33568fcaa8b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b804f3cb4426b123eeceec2adb5d07fc0198b5a81e5fd8d4c42c406e3310300. 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/SE6SA2215585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda91f4f00341dd1a1ac907cb1da9e5d35f2e175ce02c6d0691e8798a011a0bc8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFF2334500.