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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd037884bba8818b42b5db83f51f88852a0992bdb150b3a6f6d746671c6aa6f0e. 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/a09d463e-d691-4125-8f39-83aad0dae656.json and https://artists.proofprofile.net/proofs/artist/a09d463e-d691-4125-8f39-83aad0dae656.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99062e1050ef3e72c7492702d5fd4542de5cb36dc3a5aaeca1030b2c55bd421b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBPVV2300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459397bd1231c1ce77144ee0755ae5c8078d2a0296f39cfe0487ec0d6de61ab5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPVV2300591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe936417f90fece4982f251cb05a4f75fb955addbbe8331c9b790917d4caf0ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPVV2300593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6627ea47ad050dffbe51052606f460c80fe56b2c73479abfcd5770113c8316. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBPVV2300594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb976be0b72bf3f2ea6334a43dda98dba600a52c772930f60b70ef9122cb8037a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPVV2300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba04c176670e66147fc8fe27af43de9af9a4cb3b080f1803000a7da48c4bbbe2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPVV2300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64424ee1ab66d6b2be28e5c53c9e39203849cecfb14d7a9d5f72686209b10fd4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBENL2203258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9431c5a3eda34c5fe91a4671a07092770f8c735266f320a6909d0eb32fca3a1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBENL2203260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d64127561722ce92ce2e31efd216a53df30a59180dac3690f8934eba6d896. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBENL2203261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73f38c017f632843a343e5a94a83083190b184c7b27a2da570f48fe9aa332d6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBENL2203262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e98e7b92d483103c91422247d871ec6413514083c196c0deefd46ae706ab12. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBENL2203263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f51a7b539a8531b8efb682e17bec5e1a8f84df7bb6391da6b228d5bae9b4d7f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBENL2203264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472859e4c043a2dea2c59bf10b547b59ce816a8d1a7ee91bc327058b7621789f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBENL2203265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee509dbab0b6b5784957bc40ca32e82995480977e95092976804542ac253d714. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPVV2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99062e1050ef3e72c7492702d5fd4542de5cb36dc3a5aaeca1030b2c55bd421b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBPVV2300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e98e7b92d483103c91422247d871ec6413514083c196c0deefd46ae706ab12. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBENL2203263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9431c5a3eda34c5fe91a4671a07092770f8c735266f320a6909d0eb32fca3a1a. 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/GBENL2203260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bc58b457184b244e5091c49f3e04e9605f614217b111f6bfbeef114d86b05a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKJ7P2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1890929bf4b7af876d6505d994c5c639deb9c6f85364fc637734ebb37c2c69d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKJ7P2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6490c8a6b8429721c9d37a7c4c6a1be87690104829d0f5e2d6a584698435408d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBMA22098588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a5cf936f72c1cdd43c4204d6e17e5a762104d92f8258e1dfdcae14bac204b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6N1903186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e5133cf70f7b3a2e2ddff94e9189b9d2de90b7e267886e3f8227cb23b2581a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:37:07Z), 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/QZES81914278.