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 0xedb536fefdb223b23a1502f705a2296d38d2b5a1ad48cde0327641b22e2c51dc. 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/ba5b662b-19a6-4830-a9ed-9a19a710fe44.json and https://artists.proofprofile.net/proofs/artist/ba5b662b-19a6-4830-a9ed-9a19a710fe44.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 0xea1e460c9f5ad9892242db272aea0abedffa432985b1675397c32692228bb731. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:21Z), 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/TCAHZ2421485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47891c7780ac65ae4d404d5def3f7b14afff3f139b23f68b917502aa54bed31. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:50:26Z), 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/TCAHZ2421488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67636dd33bff4da805b689b12df297e1a842bead68cc6cf12493453c25111ab8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAHZ2421501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e270eadf58fddadf466cd6dfcceda3a8fd9e9a4af5590dae25fe835245d871. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHZ2421504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05935f008291830469e559b050d4aecdf66593cfb896317a46dfcf3ea45c10e. 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/TCAHZ2421513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb297575f1ea8b011da89306c32ffa8449e3615b8e48d6cd5921ed724420d603. 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/TCAHZ2421522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ede27c28f2c7404e5f52d329a0c451fcab2a0fd01502cf989455871cea36272. 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/TCADC1735589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487daed0c28b0bcfa2e71d1b527a687e9061d51db3be379615912668e2e89c3f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCADC1735578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a3711bfbbf81774b83b40e9b2e298aee4023e134b182445d875ed0c038e30e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:29:48Z), 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/TCADC1766177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c2f135bc92c43988f99618b9f9b8d8a4cd064a1b9aff5eee1abccf849117d9. 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/TCADC1766184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d9e743cd9bfd6e66d11306dab542f07db4ce26ed5362bef6165657b2dd4af6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHY2462076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd940ca7fcbfe892f73bd1c98e9aae564663e060e85bf63af85f6cbaf87d50af. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:48:00Z), 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/TCAHY2462078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4309db3c071df5d152e3c7ab4eb5b663a85fe8b9bb5e93826e74930ab6b9a6. 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/TCAHY2462081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e6e192c431449851ffb50018c393d503d1e2770a84e429b867c22861b87de4. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAHY2462083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46f58e84f7897261db6abad40dd92a24e24b3e04023cf32a8660ee7dd4a6266. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAHY2462085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc1cfd477c735a8a25b872c457faad44c4ebbbcce1d54c558d7a25e5271e2da. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAHY2462087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65caa5f16b7646c7938b79c5c51d1da9a18c05dcb4501f3870fe69465637e6de. 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/TCAHY2462090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6867a0aae367f95441cb3b27b6c96d68cd765a609f3941e8c989eb277dc8f853. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:30Z), 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/TCAHY2462094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d98b8bef7b70f65c3912c35fd584bd6a2474004472c05cda0dc1beb2b2b886. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHY2462095.