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 0xb05704cca4d67fb433fc64c8ef8980cde59c87e35fe4bd87a3467b556b03e50c. 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/f6f965be-5f2d-4e80-9bd0-fa353777752c.json and https://artists.proofprofile.net/proofs/artist/f6f965be-5f2d-4e80-9bd0-fa353777752c.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 0xf6b98eeffd571ba14c13b76cfa0f4106172f41c8b357c2b944c4766b19b6b738. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZHN32054968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c7a4988a1fd790fe6c5651e1b44cdc164aa9fdfe7788b23d8b29cf4a4f3de6. 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/QZHN32056118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d44be640c62d8f92ecfb2b1193d0db678afa43d6e071c006564865e7c6a0dd. 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/QZHN32054982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa998386bb0230828f4219df73440e241b4caa8f523768bcdc88e558bfd37fd. 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/QZHN32056500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e157cc0730f825787a4df8a60e1e2d833d15107c50e3280e78ecb39f8895f33. 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/QZHN32054966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ff29b27a8bc01041e5e3706af4aa303c50886b5148c07b23a0b7d8edd4ee3. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZHN32062024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffaae3bb5118dc954906e5ec2ace01a74bfd38b9e82493c1f699ec3d8cf128a. 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/QZHN32056731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32853272b83dd8e22b21a7a6d443e4867ccc358d5fb2a3c60b5d7d750c9cf7a6. 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/QZHNA2046590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00466e85bb4a86a7368fc31efda7184d34d0d5aec8a7f899b80c01c2af103501. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEM2085396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e77451c43bc8a8430a880cf9ab05b1d1707ca3006b8409d1c30a7319b8b42f8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2123003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7f984c3ab04ac37e270a5d41e0a5cbb6bdbde05a9c2b224ba2603da378d85f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZK6M2224268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6241c6e2d13eb379fe08e41ddda24416cf9832716b082e360aaab40bdef0c8f3. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZK6J2222841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3223f4d5e45c65e4cd9fad89c4b88d44f1983a4e3442f4f0a4f69b6b60f35625. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZK6J2240745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e197e35144964eaa6c578372adc1cd6b6a8cc5286f2e59be41689d49bebd0a3. 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/QZK6Q2393746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39243530b639a444aaa12bacea7ad2e3d6f59f027c602ac6bce3e68cf36669c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWR2311452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23f520ff2253711b0d6b9b3c38f1c5f0af887d1d2e640aceece65e146081b21. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZWFN2358191.