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 0x05b629ee69abb7b8303d35281670fffd5ca59ee0ef4d568d67cfd4fba4fa6bfd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b70aac04-5ced-4cc5-bef6-6cb55227c7f6.json and https://artists.proofprofile.net/proofs/artist/b70aac04-5ced-4cc5-bef6-6cb55227c7f6.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 0x4543d76f7466e4185d64d6971d8f59df872cd3c9eb216a7888a4a0911a73b49c. 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/QZHN52323788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b56c927de821f753e471999c88365daf3ca3fc865f2baccb9afde74d22e54c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN82322044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d24fce72c2705b756a249b45f33f0d33d91194e39d165ceb852d27c251c46f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAW2360079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f8c8215ca165128e66e23390a40371da5d793f47a011d995e5136743b91212. 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/QZTAW2360080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd9337715b50321cb148a4fe53271f2ce6d3e82aba3ffb5301f29666270c3e0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:08:12Z), 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/QZTAW2360081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b6947be567c0887684d7151fcc8c66ab604135d55da6f34c5d4c7bbbc1d72. 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/QZTAW2360082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2988c3b8c6b09857060f97f3e04f06a0849d465e83d045c4ff2e89a1a69c635. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTAW2360083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eef7f6ab1e9641d4d688f1b8ba398157d09978124b4e1d5f5f9785ffa12c48e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTAW2360086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23445d0d2f538ffb7e61d9012c77bcde2b2a679a900115605a4508f16cee3fc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:32Z), 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/QZTAW2360088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b5dc8b4ff32b426695ca051564f5ad9cba4269d86afab1f574786423ac6384. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6M2434367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17361f1177e614f9855d3c6909f72cd27114d88c91578193465bf49d912dddd1. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:21Z), 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/QZK6M2434369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3c7ed222b2bf6ca19add6c6c4e4e36b52fc8faeb1733c3eeba2b3e3bb57ef. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:20:42Z), 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/QZHNA2425286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567501dba56b95c42b9ced9688b8d2f90c87e09e28358412a23dbfcd54e3faa. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:09Z), 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/QZFZ22524349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddab3ea3429d7703a4801be858fbcdeef1cc6bab34f4d2e40a6ce14e1c6500bb. 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/QZDA42512505.