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 0x7aa402416948b24e5c73159cd03372c6b895aa4694d3aa004ccc01995f5b37c3. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdf66ef6-713c-4a3d-819b-a5815abb1a8c.json and https://artists.proofprofile.net/proofs/artist/bdf66ef6-713c-4a3d-819b-a5815abb1a8c.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 0xee2e05cd15cdeee08c4989d5c9187fd36616255ebe402db399b1955c8af123e0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:50:32Z), 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/QZNWR2379448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eb87f0d2a9061a25ea3f6e4ad5d9b85b205e22a5cd30f9bd0e62789be986e2. 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/QZNWR2379450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e3b90664e790553c9620f1ffd242806cc68bf261ebf906fa4769ad85de2fef. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWR2379452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5f5b42e3b8507981805bbd08321b6e6c593c0a593e3589059e8d441da13296. 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/QZNWR2379458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5aeff334f066deb9a998c7b1a27c011e944738c580481fea39cfe32822f10. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:11Z), 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/QZNWR2379460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0103dfc4749002a60076c6dfb53f683edc5a28d75861401cabbe86819a91fd61. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:10:09Z), 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/QZNWR2379461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7619c371ec76f812b0a80023897a5a69d6be2c7341d778b5f4a97e11fb529. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWR2379462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d05514a6a3d4bedd35cf3ffc8e9dfe55826ab4f87798e797b9bdba721274a2. 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/QZNWR2379463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f51a23fa02dec160b94947623fb599d0651243a6cea875af408599333a8e7af. 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/QZNWR2379465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8b8ad523e9b7f613c52173a930aa4e06a2c4ccd9c841cb576f367a9da9e0e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZWFH2486042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc729417ff4612b078ae6b1c187996f01ecccaaf2d0731e5f93792413da4b8b. 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/QZWFH2486043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886bd17acb690729837938a829658920ea9ce01b503ac25c09ef83fbeb3a8f67. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZWFH2486044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8d5228685afd7880380dd4c91df641a5cbd91d657d67cfa5245d102504d007. 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/QZWFH2486050.