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 0x1667a11b56ee1dac9d108294e1b56fdf19ff9d38a3e41a33a31693003473c14f. 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/e0146c96-54bf-4682-bc79-fb00b0eb7bd6.json and https://artists.proofprofile.net/proofs/artist/e0146c96-54bf-4682-bc79-fb00b0eb7bd6.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 0x12c74f58f7264845effeed5669f0086aaa1aa62091e6d30d2a0e98969f3eab82. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZFZ61904009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506448d62a8fd604cdeab660ad80be063191d919165e2b96bef9f5f0eef892fe. 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/QZHN31971017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65409f758c35eb6cc7124cfc3d48dc725a7133d60abd68fde06b73d7e5cb52ca. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CALVP1953571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf26a36e5f6271277ee901249a7aafe64b7aaac60220d072d8cb1882c072747. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CACWV2048892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0fd6538ae20765c02b5e453af97625395fdcd8acb08ea0e7d9ffe496935a50. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BE1HK1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abe8a5d2670298b03af53ff94acefed30d5563bac6608216fe4ce9539e93ab5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6H2090217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543a366b13279f71939fdc448d50f73f27d0f50b0c37160ad75efea7b6271001. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEQ2086017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046e113d1fa00811c72a1998d12ff69dc207a46df73226df664350a08737f87f. 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/QZES62105110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fede6397d7d6105e03c5601865656615aa9a09f9df13119178f86c6dbd8449. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWQ2198042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8949c55f9a0608f0c4de86c09d327520b50529fa92ca9bd96f1df36ea4fb6e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZES92241542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71057475e73ab0106a6b304b5e497661b98d534af275852d22892f65b9f9b356. 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/QZPLS2312540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba011e9b46f653a36981703e4d0ee926bb9abf32680cc4b6b7cb5912724d94. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN42448922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea5425ce7c42bd7925fcea26d15f948975e2fd9fdb4e4a6de1787889567743c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6J2450960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05bb34820107d9bf486fca9972c0f1cd778103b1d0629d36c8b3063d6dffc05. 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/QZZ7M2491380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6739c70137e0fa8b6a075a6f7287f778c721db91ca490e8ba1a2c290080e839e. 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/QZES72141556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5e978f5619403036fcc69a27f7278bb96538609415c97bba0d5954c764798e. 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/US83Z2402846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e1ae9906daf8495de1161369f8b7cf97ae7b8cb376361df094fe49a9e19ac4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US83Z2402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4746f5f32dfa656554eed9f2a4b0798eb72bd93de99192f71eeef41dd981265. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFJ2433935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600f7bdc5fc6d592d5139ddd1e25ecae9b080dd6aecbe7e2a53e3835f90480c4. 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/QZTAZ2494947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56920d8c36319a9022e3e27420c88aff415f6ee83ba1adf48be50306c00880f1. 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/QZNWZ2456581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c10e30124195ee1d6fa679661528c0c43b7cfe2545ff2f80bf5f4251122d19e. 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/US83Z2479826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889f121e90bdf5623dedea62fd7ca6377489a53db436d2367d4277a6da116028. 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/US83Z2479828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514d72efed555679ed5f0373589e05d4d20474fba9efd5aeca2bcc2f5477c3a0. 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/US83Z2479829.