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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b733f91a41c6a1898d388e5be7ea522ad99fa881c804a444cf709aeb4644b3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6f553ae-39b5-4586-839a-731b85896001.json and https://artists.proofprofile.net/proofs/artist/a6f553ae-39b5-4586-839a-731b85896001.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7825d3b3f521cab397d94b75719e0e1a506369ab806f50c0c5d57a75436aee47. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA2038653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb241a1a171f9c86675f780311a3707481ac557e82ea951ebc44e93b2c3dc217. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNA2038654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf51183316d38bc4ae14b09a6c231e4a5ccca23482ca6a71d7dc817d44397d97. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:00Z), 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/QZHNA2038655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809293a67e783e20d321b1751c9355472c05227c4169421d62fcdcae67fb72b0. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZHNA2038657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253f51955773a19ecf1e388d715bbd6868737389647bb2c877e29ab1431f643e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6K2098626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4068d6a3b68dac57fe54bfd76c6b062efaf9469c63287974233d6bd1466883a. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZNWS2024463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72131e3bdc6e60cf7522afcf794ac714ebe9a9465461101ebb4ac501b41a254. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZNWS2024464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7368632465cfaa9fc573cb8a337a251fbb96fd055c7e9114317d7add086f15. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNWS2024465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262908bfba6275c58c1c0acbc8b3937a2ff94312a297252ff52b8b6ecc756364. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:43Z), 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/QZHN32041824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e27ac897fc7104ccc5ecccd2aa5cf0de03dd91c3b1d5c4ebafab4b454ff1459. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZFZ32108444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a2fb781deeeb4d636f3d60e2fca746d424f0234d3ad45cdf1f0122e5f9884. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN52123690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757708919302a279ca5ac36014e3a434b187247c1b9829636246e602fd633354. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN82114240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a01ee511bc8338bffdecd9aa6cd762c4133a38a078b315e027a07527d7b01. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6N2194329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750e903473c7892493131f83a635882d19d78a1fd7ec0e1897d6a6b5a67b6ff4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:55:20Z), 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/QZMEP2128740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc960e35fb9e6c8642782d718a700b724f8ba47a7360d60f87e001acbffd3a5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWV2142690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263ebf62cf977752b07366820e10100e9789e92ce6bbfa898fc823c674758b6f. 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/QZTAX2265975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5018cfd997c12fbd5698fa753be5de005e013654b1e9f8b3778477e8999416b6. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTBE2535506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834e6ca5a73344adb78d8967308e365aebb9f40b2cf0129993d96f4c0801bd28. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F62533847.