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 0x596e73c86124d6f925a91f9894607d5998cbb8e3b6b8470b198fe09ce6b83b96. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70288f7a-da33-4ce7-af45-bd65763cf374.json and https://artists.proofprofile.net/proofs/artist/70288f7a-da33-4ce7-af45-bd65763cf374.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 0xd3d3e966ede6517ac1c276173c9481fd517a538db95a610dbc84022ffeb95f86. 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/QZNWV2294114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d6a220d08361c3a6d36686d0df05f2eaf93f90a60fdf9fb5cb4038d7b27f64. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:15:54Z), 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/QZNWV2294115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e94a25f74fb9150d8c2119ba7d495ac1265fc430b7e7f215999436b04007e. 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/QZNWV2294119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd9a114fa5e8f33e1442009578f406da6e6fb0d605c925be2d17fbe6ea118b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWV2294120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48188528e694a9211c56f69973e52fd44f8cd612eb9129ce1ea30c2bbb13c5cf. 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/QZNWV2294122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8ef3e076ac0b616460807ba397639ce9203312c4cff62d94fa045c34dc72f0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWV2294123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74f3ddba3a5a8750b86463883fbde09139c770616a015db6b855ce8f81f2d65. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAW2257657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa24acca02cdfe4330c909e652d95de59078dfd96dc61c744f3e20adb8a4535. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTBA2286145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d20caed60dff78f9892bfcd55750fe38a5927ee8476b9dbc6041bafc79f588d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:09:16Z), 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/QZHN72307414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c3757bbc00e5caf56b1e36d6d4c8e8af7cb3924c0f39ffa906e8463dcd1297. 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/QZK6K2370688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89be4b8f1823310df8709c34e7a05f6575c35b2db0378ff7cf99b4d1514a3790. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWT2340887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaec43eaa650da313e1ecaa6262f2efb989623dab2d21529493798d8a9678a6b. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZTAZ2313184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f7efd8e5e7316532a40ffab61a7226a387b2ddf02def359fcc7b2eeda423a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFE2318746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40281c7121cb7832167ee4bb64b5a592b589c1297c140b7ecd37ae1845d62659. 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/QZTB42422678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf753cebb0de3edd6dc4b1d67fcb47361b902b9ff7f6c42627cc02563e3510d1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZFZ72556325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858221031d35970ee3d16c0a8dc43f1a57ed2359247fd547020eb6439f75b769. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6Q2580070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25ce93a55792cc91bb0e9ef068f65daa5639473c683010dc4b32ad7f440ff50. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWZ2539031.