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 0x78d4a32f87fbeddfec147b734d8b8b7b3ece41fb0556adc5a1493150e1a3611d. 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/ce0651ce-932d-44c1-8d36-b977e90d6dd3.json and https://artists.proofprofile.net/proofs/artist/ce0651ce-932d-44c1-8d36-b977e90d6dd3.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 0x6a13a845712d9fa52e5174530a67f47a6d9960c329f52982139be7d56cdc5063. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMDA72298463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79ebafe4283a8ef578518f7f0e2b13eed0d1f51ddd1f4a0bc50e09c0172994. 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/QM4TX2203110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc98f54058cbb1e7096d3ded5c0dd3e6fb7fe36b013ae1cb8382dad901dc5a1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMFMF2119212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf892d558aa7c03087e4b84e26a1fcb5fc1464abe16e4df9d72222ecebad646. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/FRX452354121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7065368a0019b66c4c6e4672e8d99861f84104a3baf4c6304690b41a8272c1ce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM7282351946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4375abda827606f7cf51061a2b2237db8882e924d48d2e07e838ab0ed2ff463f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM6MZ2210042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae5fa17f6622e1fe79993a33d926c9f7b353a7cdd7ca1f9192ca7b1d18d3045. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0P2306218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb6973f88857cf6d1a5dbf45d50c19d87a27ae692b089e79f2ca31c83b35c41. 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/QMBZ92261630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d3f6ea48c0fea04a57fbd3e2bf7053d2072c298826cf1af419c48457a8b5a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CAHQJ2441314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4bde8f597589158f561e5525a8ba33cbea21641292b1e7c5a2c93d73064fc. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CAHQJ2441329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89633cbf5a95c48e9b3b9f38cfcc852624fe62e855d944ea3a9a50db5e4c0b2d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CAHQJ2441336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66561978bd3fc5ced9569f21b5739e5c145f6de0037f2fad370d627c6c190627. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/CAHQJ2441338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d75c51618e40590a78fc75b596cbafd80d7fe112763f3ca3dccd42c2fa075f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CAHQJ2441340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc922cf9b99088f29a1639e6eb7f535dcf6baef413c41cef4b5d3b5e1cc12d574. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/CAHQJ2441343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe457b0beafc6147e25ef57cd4a2cfe7d59074430b4bae0eff00533b2ae13ca50. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CAHQJ2441349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffddd3369c566d16a3fff77981e8a5206dfe96da2129c3ad93a27c524d8d0aac. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CAHQJ2441360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfb3139b7dbf45f7e912078a9fd0091551eaf75167d71662bcd4e5e4fe3b9d1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CAHQJ2441371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c40c5f8dafbd042f46d115fef2ce35f986a6f8dede9aef075e08be1899c919f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAHQJ2441381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10428fa95123d483c1b4007a1ec0451383517b130a7a3ca415214f8c07c8a94. 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/CAHQJ2441384.