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 0x4377c4fbe8edf47852c772c464a3f7c003427058535453ca82d6f9b40ba34996. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b15e4904-47cd-4c54-81ce-43f6fa9a8582.json and https://artists.proofprofile.net/proofs/artist/b15e4904-47cd-4c54-81ce-43f6fa9a8582.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 0x7a7cb3b8de1ca9f23a49a570da8e16a6a614b0e790b0428525766272e4aa8744. 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/QZNWT2296971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e58d57a8c072a93962d1f73634c144f422cb1bff46c512c73c149551ed8dc6. 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/QZNWT2296972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d98d04f00bb70ffa7f95ad9ac50e92ae80504d08b4aa97202d75e2190ecc886. 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/QZNWT2296974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb656a28fa5c96841ff427e7f277ba2d0a00142faeefe65b98684224961df70c3. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZNWT2296976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7b490a34b07a774e76590d234f3efce208c9726ef3633715ff6d0990cb16b5. 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/QZNWT2296977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514b708f262ed5e047e54f210e82ab8866cca035567ce0cb242a4b783a046730. 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/QZNWT2296968.
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 0x857fd252ce84d8fbc9196ec3ac755f264b038da2a3c94757d45d01fdf40751c9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWT2296969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfd220db1d62846713775cc971f37259a669d823792acff2460c39c6b1a1f89. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZNWT2296975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd92f0ac520b5c9e9a8303c980e2fbd218fa9215471516d57fe0b4867b2939d6. 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/QZNWT2296978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62776c9dcd9c96d794d7f8b87f31e444666793c27c056b3ee3e482a8dd93f3. 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/QZNWT2293898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f3055060fa95be87c23143b0ac61ac9ef155c8d1a46e4b89c40e6b7843ef8. 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/QZNWT2293905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e097af454876644fdf51bd7abb6b17dc02c13abf4cd06cbdfa8a721387a93dc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWT2293899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50df081fa06e93bf16ee7357f630bbb0189d84f8acf0096e3178d731d74f5d10. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNWT2293901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13aa5e2d3b370a56a3736342009b0e2636360e974df95119816251c3de7cb2a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZNWT2293903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d5a3c9c73318d84dd450eff2f42eea4c9f7f81985e35408866c7a66f77de08. 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/QZNWT2293906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8a9728d917b47d70f68a4202184dc36e5d9c76c099fa17e386338974e5afc6. 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/QZHNC2412943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2ff3de0ae390d2c55a2ec23109a76b8efd52e3ec51cd04b53e96617f59ea9c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNJZ2316347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9cf8e6426e0e58cf6d5b9c08d344b41215fc3b183b7040338574b32d0d4593. 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/QZ5AB2393697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fa617b0e69726e4345aab594af432bac30c81d2e502ebff8acda248cd26fce. 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/QZNWQ2228696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413fd7b946c298aa55257646f15bedd8445de142d6761d4a527ef09fa691206. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEN2299959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10dd5f671815da46705c8cb82aaeadab6f79988e2cae598cba4b90b30052762. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP42195814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf602bd2ac80518e309cd9dae066811c7a7c7ef3ba357e4087c13a20fbc23135. 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/QZNWR2158059.