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 0xee901ced106a5b4370347fe09586886903c5e125cc4ef2e661a7e308b67f4d9d. 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/266e238c-2fd8-46a7-b358-e9377d04282f.json and https://artists.proofprofile.net/proofs/artist/266e238c-2fd8-46a7-b358-e9377d04282f.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 0x49605621c5e0d0136ffc2a600916046a4912c01d8227015b570badb3b71bd90b. 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/QZNW72307181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21a31327ad0b2c3b5de3e8e589035f7b8ecddb12283dcdd799e37608bfa7f4b. 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/QZNW72306767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461d7a9426266878579cf841efd7eaf3e5f644ed5ab3f5e1b15d7582c091a831. 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/QZXLZ2303212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7680484838c4d905432d86dc3027b6acae6ee51947942f7da37d602b3898c9d8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZYXP2369764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8822428935c338a2153f2a279310ff580dfc3b76461351c4073d7f7ae2970c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZZ972323193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417a5027dfd9053bf559ec1d8d19416905146405badfb77d323e6e001d01eed1. 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/QZZ972488023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a83322f811c5b176fdbc7eb1210ca5e9a02ecd4a1fa2deafcac28d1bbd1b2d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:45:46Z), 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/QZNW72411278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5681e8243877c668356ade2db577d5b1dd32b7913517054ddce6ed073a338f55. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZXLZ2404231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a5183b65f16b3150dc82af2c42cd3073f21c3533ef2a67976bcf1bdfa37dab. 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/QZN882569719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f015000b2c2ebbf488facb2090a1eb942099e1d3da88bff8ec42528fc6e5db. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZWDW2566961.