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 0xb577bdb0b2ade501d3fbf8841a801e8d6d323fe36ac83780ace98b1883b4a182. 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/46e862aa-bf0d-4779-994f-2ede5924f2b5.json and https://artists.proofprofile.net/proofs/artist/46e862aa-bf0d-4779-994f-2ede5924f2b5.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 0xb59fe9c14ac1a7a6e80a2a18eaa32191a6cf9cd784974b3d3b3e7a597dd5d54f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMEEY1300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc923aa59a83cadd6af8292f8e7b4e97a283762e9a4c208541eeac3d3e8b079. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMEEY2000383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c49438d642f4ad549f6ff33327a6fcfaf9f793a295b388b4d3362df9435545. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QMEEY2000387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8442a8621777eb015cbdd576fc69a116e82a9d652b296d62d8a63811fffc0fc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMEEY2000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516290be40c7dc21dc6287d3f92b1e11684d0ae31102c6c3e99fbad6788651a7. 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/QMEEY2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa559637060e0237b03bb11ca42635bd5ec51c7fca3d59dcb4a45a19a82616567. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QMEEY1900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112ef3d9fbb2980701193c9a766ac25ae437eef6ed4f0f5f4946e7dbc74232d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QMEEY1900296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5214e3303d796713eaf4769a30480e268844e1e861d414a87a467a3d14be8354. 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/QMEEY1800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69fb50518d77556e6bc3c1c7df54a7cc3812cac25b93f6113b431f4f6d17a29. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMEEY1900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5124e72db156d7839126c5845b7b1d99fa67cd3cc210cc543d6eaba1d04762e. 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/QMEEY2000961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eccf6b96d4e1505d472902bd9765f142a91bfd3ecec707d060e30b22bf22b4d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMEEY2001791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f3f042736d989014da1f01f617e3fa6b5e166f53a7f95c0f9d75ba24377fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMEEY2301284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdaedfd901acb85458e4114a2b6702599192e875b7a5784f1c134603c784172. 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/QMEEY2100928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a3e959da25b45fc51bc2f7a046bc0542bc4d49d12dd5fcf68a5a127991ef8. 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/QMEEY2101014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e1f37bbb0440c61b492c049f44b551fd253ad156e0170ffc7f1a247ef5b1de. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMEEY2101016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dd90b6636f79ff1a4bf5ce3121642784133b220a14e8d07645995b5b8a9426. 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/QMEEY2101018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1cc9ffce5e13af62e109cc155221e4c5976597a42218067113201e2f09efd5. 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/QMEEY2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8ad220728a85bd54c8acf8048bf455ad138a702d8328e5577b71edf9209074. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QMEEY2101023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bbeef713a4523e208670f88d91bbc3fe2d49187cf0082cff0131cd0bbc622e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMEEY2101025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec8c9eb71c07f7fbcba08e699201d92165da76bd365d1c737cead8489b5900d. 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/QMEEY2101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b869fd7c8ca8a1d53067f51eacca1743e8c950a1d27c78415a37e890c0fdd8b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMEEY2101032.