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 0x9e085b26dbac205f8724f5984c730916deda54a6bb31a74d1e451c595becb448. 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/1679fe64-9ec9-434d-bdd2-019871289e06.json and https://artists.proofprofile.net/proofs/artist/1679fe64-9ec9-434d-bdd2-019871289e06.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 0x94dbbf4d20702d6a9120bca4fe18cc0fdbf2d4e14a9389e9c21e09295a310d2f. 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/RUB732023785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3141407c858eb26f5350b374140dd64fd5f84bdfcdf372242f8d9bd5fcfea1b2. 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/RUB732019959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e65fae732c98156d6708cd358cf7ad188a72c7ea0301b3a8a30143f483ca1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/RUB732019957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cf9a4f009b7c35858c3c16089a6ed63e8db56a52612d891d0f3b1cc51e3232. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/RUB732023779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0974705ee35c7d9d4d4182a88bbaea65df3451e882aaca643c35cc01ded3d38f. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/RUB732025731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c7f3b8fadd123a8a5aac2130dc7e7ef357d225120d8c6130d0534087b870f. 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/RUB732028451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28537516224601b114be87aecfb7224be80049fa8c385c5bd5aebcb63f3d7e62. 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/RUB732039013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af6fb6bad60dbcc4e0a81d8cedf9697c79d88fc4619831649ff84b9d6e675b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/RUB732039005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472170c617088c5cb3e61e888e4d1c09a3718266bc27d7a02c8b60dc03d98cc6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/RUB732043664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6def74c6d6210bf14d3de6dad8e3c9182a2de94023084ca705c12c090eda09. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/RUB732043658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c6c71febc95b15aca2eb60ff6553f37502ea9a9d5d7a89104a08640ec59ea1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUB732043668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31983356de177112557725317052fc23caf459f9734adb778f8b6cae88a1c094. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/RUB732043666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f33a8a517dadc9698a9508ade1acba52183545e93bff56e6d2c2765806755c. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/RUB732043662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe646fd843fcebebdd5fab0b4eb87961a1a9d6fa97f1661ea547f6363de6f34be. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/RUB732050633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb091141799ebf2e4de183eca65d038812ad4e09353b1b8b39170637306bc4a62. 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/RUB732050625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477d7bc87138a92dd5e8fc6db76bde312dc791291c076f0e4da303e74c3a16d1. 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/RUB732050615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5717707017af3b7a45ef58966f954246ce36253823f0b25def6a6c11938ad5. 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/RUB732038991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1febbbb82e6c1403ba49c14482aecfc525d69f122ff8d70b84f18f5f3d14ae2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUB732050637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd41861d843c103f0e38eb7ef5babeb6633912fa6b19a784a85b11fd118c0e2. 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/RUB732060751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a2bac19a45f154a3e0c338e2f49075d07dbb23b1df3e887bc374d1757a5784. 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/RUB732050631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fd4257cd18602b8b6bd97a0c8ed8a5d7ecd813b82efd441609dc492e91bf51. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/RUB732054470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c67e2b18b6dff5fc88ec1ad566724d5f7f0a4375647e2ba17098a6ad87e148. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/RUB732069772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5051f29a1d24e8b02ad49eb41ac3d3f349de0ab159e1f55c4179eaca87dc1c3e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/RUB732059342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7455153529739ab95677f2ead8421d224dc042a24d561eb7a0c10f08ec38b123. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/RUB732059334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c67b7b4a0f610d0d6988b9bd5d5417d29eba05f7cce1c373a2148dfab1a0e5c. 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/RUB732069774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd662c66df7a3b467539a3afc146f53287495dcfb2e5421c755abdb5b4f201f97. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/RUB732054472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbc26d10cb704bbdc6a17e7832fa44e81e383f05040852b796a28ebcea5378b. 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/RUB732054474.