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 0x99561e20c56187fa08a2cab02181a91dc23ead8b8cbff744fed77156a4cd951c. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cee92fd0-e8b5-4efa-b70c-04509b1a0139.json and https://artists.proofprofile.net/proofs/artist/cee92fd0-e8b5-4efa-b70c-04509b1a0139.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 0xb757f092f8fd1faf0fd8d545172b65874f46b3b5703498ca0518e6340ed32b37. 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/QZWFV2463736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f5bdb1c1964b70a3cf9a301b5f55a1343d5c90d9a7a1db2b75fd729d392236. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWFV2463737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efaee0082ff22f3e9e483a30d1bef2923f6f55181e27a7361d974b29f3ce158. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZWFV2463738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45100e71ff5756bad35f683e40af6f408f2078c555c8479df2ff2541989be749. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWFV2463739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba0da4a8fe4add35955cfcf1b9b2f44e0c51631df5b62edd948c06e635a89b. 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/QZWFV2463740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d315936ca21d2f1e2b6ad1ea70bdc1d92c0e5ffc395fce9fc3788ef2ffd43e4. 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/QZWFV2463741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda9bce62fe5c27cb695b77dde3a41e892aab4f73d59ca2eb68cfb48f9a53ab. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QT3F42412871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64fddaba70c63cb2a8f822b4b8fd60d99d789c5b82c8ea5a8e06525d1ada79. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWFV2463743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad461fdbe094f31eab6904298b6bb7ad7ba117e3d667cb368426283cf5c69129. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZWFV2463744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8995890421ef4a14cf911522ee7a88461285c07e48dfd8c4f22cb81e959a80. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZWFV2463745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb4b255df0855595963a7f8d5994c543e8ce2c4913b6772a08ff57bc495a97. 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/QZWFV2463746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27afe46d93a3e533f2af64492964967de502331d4a474b7f3aea89e4abdf45fa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZWFV2463747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba57df3816a1259c2cf5985617a0bdc111137a06644c3a5dad4c375b0cb571c. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZWFV2463748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d47ff98e802f5c980c40ace1dcb0b565f6dc146f821066a991213bce020c2c. 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/QZWFV2463749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7047767d1cd88ba6c95da3a1d67dbb2af57d6354a2ea38b09aca21d28008b97f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWFV2463750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f867848abceaeee0ac17363e992787268ef6ea263a797778d88c96530a244c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZWFV2463751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c831cf8d2863dc82375505a8f6d469c3e218154babfd69dc783f83437729bc7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWFV2463753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f980b295cc7393b5d4fc11eaafad917830d3fc37a84ac021a1615e2aa67d7f. 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/QZWFV2463754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4c0682caafb6541ea0c4b0c5ece198d7ca249e665fbcffc1f186e2b521bef0. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZWFV2463755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109776db01da7c2eac36d9c3927590f0ce7858e46eaea39399e55b8875e6a279. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZWFV2463756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090a8b3c274ae9605fe2738e6004ee40dd182b83220885c3ac559c9ac67e3856. 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/QZWFV2463757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea1bcfcd9d849b75b0c0326a6af81187fcf80e78d60ecb91ea338c73421d0da. 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/QZWFV2463758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf508af477894ec637eab545736918c75e8a2bcda431349c51ade4a91486f22a5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFV2463759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae9332b8c47bfccb17c7fdcdc82527900a697bd1b48ea9d4454aa94fa626f8. 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/QZWFV2463760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7687bc9e87e6383b8e5cdad4ff431dafecf488577d41d076172bab9d42d546. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZWFV2463761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ee628640abf30c78822ebb6f7f853c68bfa5169a23884e34ebe90b7420ad0e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFV2463763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b37bcbe6cff7f4888d9b4932e73a15e065d27e285325f5bf17a905b37685c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFV2463764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b5b7cf03a3214e027456207e2385a7d0c93409143c4faaf9837982b24cbcc8. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWFV2463765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9267b133d86684a77803453698ace0e4831959ba2acb55cfbcd78ad60f82bb09. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX89G2573971.