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 0x4cdaf25fa22ca02817bcae27c897f6365a790dfc1e307a9952ee4535e607613c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e6b684a-4b70-4a25-8efa-9957d24f2a1c.json and https://artists.proofprofile.net/proofs/artist/6e6b684a-4b70-4a25-8efa-9957d24f2a1c.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 0xfa9e3777f3c6956d7dd8194f83c16769f4c8fa7a2b77621be8ed6e29d2259e96. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US2MZ0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d45bc68f205cb79c9ffd15d609f2765197bc634ed197832cd330ea137919ac. 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/US2MZ0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b2f9107c0259d45e9ec923b2923f381531b251378ce51caabfae9d5eda299a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US2MZ0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0b23ed7b8a61e818848aeb9bbb3f6cb026e4e0612f82c29cd37774a79d9d2f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US2MZ0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33506d7113c720f0079b06ad2adf61f53f715b472dbab6aa62a04c8931399d7. 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/US2MC1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cc47f351410cad51f711559c437bdce5f4865e634029f6e2cc98717ede7609. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US2MC1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1bb1093fe13513823a2f49bad95bcd05617f179263081bcb985834abd5004. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/US2MC1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd17a54f240f2918d14d0f3e043ce465a238620c674e6f11500f9068cb3ace8a. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/US2MC1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac44b90923b23ff59dd14007b397b18354ae8f71ccc2526a2c74d30fa7df858e. 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/US2MC1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21f0fa769b9e3d39d9d6e33134f73e6e476099638a01dbe6a6072fdac3653c4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US2MC1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8208916f36c49c2fc46ec55917dce56fecf5f9661eb1e983a20a44b7ab57557. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US2MC1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151aa362d7ee0462af8435c61b71a8a5aacdfd306fe2bfd5502b630cd7a5418a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:37:04Z), 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/US2MC1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5926ca04355d9804767b51572dd8964651dc3fcc6fc46fa80d502f7713c6c0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:38Z), 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/US2MC1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a18601160704c9b7db373bc017c5aec3db78a9c6b3146a01159838e8732ea1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US2MC1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea3b04c0c30cdcd3da7a77d3e58a5bc9ab2d76a03e84f0377b01152b98f1954. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:54:26Z), 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/US2MC2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19b56e2d0ad0c3bdeeae1c2de9e9da0ddacc0ffa547177fb1c0be8a037d9255. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US2MC2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5033b20c84e8849a2a65f0a21e47706c056275ca2a0fec98cb49a0c4e38459. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/USMC22300007.