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 0x6935bea7deedddca6689acc2a3c7ffd885cce489b3136650e575708b01326fe9. 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/da58a232-b1cc-4f8c-b6f3-29cf80b70e14.json and https://artists.proofprofile.net/proofs/artist/da58a232-b1cc-4f8c-b6f3-29cf80b70e14.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 0x5f1b0c966943610a36dc997b21fcb5c219b8e4f6fadb6abbdbb1ec886ddeab5b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:08:52Z), 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/QZK6F2494671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fc8bae9bbe22e5d9bcd9c5768d0152adbc6c5dd055852c286d87bebd601f18. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWS2451227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa588906c8038617e09303b99d88d21e33ea09e96bd6fcf10469ab89329db5243. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWX2427252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d5e5dd7e51b6ba28b6e9da630c1ba8cbd83322ccd3061a5caa34de58b707cf. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZPLS2467243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb96bb7e6207a3bef75126e17ee4a95aaf8aa2bd80a4df38e969cfd3d858d9a9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPLS2492440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f5c0f20c9b1bb2c7fb0c5774b1e1aa752ee61800ca232a22d60811c83260a2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTAT2484850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1e7b4ef8a891372a55c5b3a786bd193cc84c4ebef27be9e2f4375c62114003. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTAY2429060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e56d69e04d8351294634ab70cd8611b7e73d981a4bdc45ffb2d1a1fc0b0867. 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/QZTAZ2468922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dd499bc658f155203d84752b01ffd9cf27a59aed19349b5c6bfa127a1c6adb. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB22408878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c0210a02b35196455656b6edf72b268f8c7d7cd27366b04c6d6d73f55e7bac. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZTB22409893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831aa406562b4e348aa932841108b8dc9bcc5159b61f325ce1be356fccc95de0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB22475124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea7790edb272fc3dfc4637e8bddffd51b86f71c6de61e22d7e0d8ae3270944. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB32451795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb0706d8eab1dd306ed6b3b8b300d495450e444ee70bb3725cfa6871aec7a34. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBD2424892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc610ed62c503fc486eabeb6398152c5fbf19d8f454fc0478f039ddb9517d4c4a. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZTBC2427131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5cebd943c8098a3a432976bc53651c73ff01fed12c0cb9bf905c00a1e963d9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7V2437358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5db7279166a08ff301725167d418a716366a693c91d20058abc3e40c01ada. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA52500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bff7639ef7bd905273610621dbebbb17eef55478c43451919cb4200ce4e4587. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZDA82561752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0837108352a8e8922a2541d1b6f5b7257a60328209f7a291f140859ffe5bac. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEM2549062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5172861c70c81b1de38859b0bf0f664e424af41670f9c6e493f81f59d6b8c1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:04Z), 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/QZNWW2559754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d9349fbe0b77656f0ae97a8ac42df4799ce6ad1e8ba1cc5367aeee691831ce. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:37:20Z), 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/QT3FG2572379.