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 0x6d6ae11683bece9a7188f4ef51a9ddc21d1195154d5aca20216267595cf34d9d. 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/f2599e39-eaf8-4719-b1f2-c89c9eb612f4.json and https://artists.proofprofile.net/proofs/artist/f2599e39-eaf8-4719-b1f2-c89c9eb612f4.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 0xcee7c036ea01db44a228da11fee1caaae31f7dee2aab91a533833cf1597eff40. 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/QMAAK1976461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32832deabac77f7741b8a703dbb522b8778a4bd1c7e3de183260cd061f8c752c. 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/QMAAK1976462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe57eeca2b64f1ceb20701680a55ecf88ba34598970930e725a5d5532a16a69. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMAAK1976463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6960ede6cdfd0793b7e9aa835de01e37f8cd85ff643c911af117630c79deb5fd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QMAAK1976464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bfe9562fb9fb1a35e9eead18a9f0f7e1c32090ca57a256babcb98acc73816b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMAAK1976465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681da8bc748b7fe7feb1fb712d14611205245180eadc0457c6832638c9893cd2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QMAAK1976466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8609496ab66bbcd7169805ee0c51dc1444af0aee61d883151d12b3850eab7f4e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMAAK1976467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570430e74f9da5645cfc9d87518ba7735cde9a90ae1d15823b15341cd0c278c. 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/QMAAK1976468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485955c705bdb899f737cba21b319ef8bf622bb9d834694862f6b0563f829cff. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMAAK1976469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f47a9d41004b891b97eee9d7df272915433e8b21081916358e68fab4ad8b3a4. 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/QMAAK1976470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b109fe840b1df04d4f4f225b883b4459454ae8b225b3e809e2eb8bb16292f2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMAAK1976471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe226b3675796dab452e6b180149282445ccef38505dedf43bb94b2d39244b603. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QMAAK1976472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956cb70e47bdb4e3d3702b0834545db8dad0fb6f464faedaed4eeeb89dba451f. 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/QMAAK1976473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82a5db061bd19b9986c5a4ba8e22c4c8a035fd077dbea142f2d65df0a996187. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QMAAK1976474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c4832de197a4f944ea2cb3ec71658dec4c624706f1c80e00c7ddc275da5906. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMAAK1976475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401a4771bee88c51cd9bb73c2a54f73734efcc9f06327e551a1634583e116f28. 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/QMAAK1976476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbede0f725744cc873c4cf0716238fd087063df69c99585997b62ae73b6534cfd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDY42486797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9568411ba9548073f94648270b51279e54bccc15f51181f1836fb25cb3334691. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USDY42486798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f1ebb72871bf5803b15b5f2bde56dc651f3aab0a79ca4db5be3613e49aa69. 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/USDY42486799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83837bb3a573788cd8c6783e62509f20a8e98e2df26ed6b2f448ad3b30ff10b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDY42486800.