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 0xb8ad0cf41529167cd84abd0032c6c15dece2b7767757714175e5d1e2f96deb27. 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/acd8aa5c-157a-46f7-9751-8b63bc083319.json and https://artists.proofprofile.net/proofs/artist/acd8aa5c-157a-46f7-9751-8b63bc083319.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 0x1404bb2b5561d628012d1458dae86a09785b5cf436f82e1388f7718b2b3000e0. 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/HRA049421741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5480ef67f72f57747072b6bb5447e1cf448dcce19bc091afea2afd820a00db. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HRA042094069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1460d220715c1ebc5906a16e94a47062db5b5345d097f33accac5327459834aa. 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/HRA042094070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c4ba163b9bea4c42a3bce065a20877015a926d5001730f47112aa47ad5e06. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SIC031000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884459c08c97dbdaefbdd26b80d5d354b23a87b99080c6ede7264a527b4e3d06. 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/SIC031000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab5e4cfa3fb5089f2a34699802cda47116e611cf8f4c077230b535deab43b4a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:28:11Z), 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/SIC031000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b6720a2005379e5fb7a72a54261b50941d4e56b0cbe998b5f1ed8c19432b2. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:25:53Z), 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/RSA221833662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129a84842c4573ba02d3bcb38d18d9bba3880cff9fdf5e7c2dd1e85c1061070c. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/HRA041990957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d79bdfbfbcf2c86188b4fe015f0f6faee57a104e506456896fceac7dda4409. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/HRA041990881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d5af0a4a8045a435ff2eca9e2b51983146ebb58cbafc5d17afd6452ee7ec83. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/HRA041990962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f83814602a30e6eb49c042f99d1601d2448eccf423ba16e09c10db444fcf54f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/HRA041990964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bfd7f90a7e49aecec1e862d2b004aa3076b214175695471f5757c103b19afd. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEKB72436212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f053f7a105c72b016f2d699068032d8cba54e1a3cffbe6012f91c778266501. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEKB72436229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6c07c107833e1e74a4f9ffb721c650ee5d22f0ad5277f36b1bf7354f5513e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEKB72436188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0662533a57517de8081770f7b645e2ed302f55251e8d6915b3afd5340de59617. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:48Z), 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/DEKB72436195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52cfdd14ecf524dd8e63fb3092d242a91a29ecccf4efc0a4c7b0b71a23f040e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKB72436200.