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 0x88828cadc7326a05667305cbd4426667feffe4cb635e689c017b892d3f4a7dc4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f067fa3b-4c46-4820-8452-d4ad1ff5bf7e.json and https://artists.proofprofile.net/proofs/artist/f067fa3b-4c46-4820-8452-d4ad1ff5bf7e.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 0x7a82d1911e6733b653102b57e79f06c2d7aadd07c24a2df949c9e3ad697287ac. 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/QZZ7N2473972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136875a8c5e0ffff4f2b20c7fa1c76e14e4daaf229f1f4e2e42f4f2af51bbef5. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZZ7R2427660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5118378103935cb7dc3ebae13d534839600f5230a64b4a4bc0490f8d3ee64f6. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:41:06Z), 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/QT3EZ2465869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50fc655da5f5812683fdb8a4abc3ce9bad79aae5a5e755b575608a3faa876b9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFZ72568266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474bc8f8bde8052cfac69ba97164ab743ad021af30469b95ed47c54ca85003da. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZFZ72568267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36dc7baf98e69b4e947c12ffdf1f84c80278215eca64795ea7932c038306861. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ72568268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93522423cc1351c79d15d86541e2266eaea878212ef091d7c26cfa97b02ad9d0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFZ72568269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ab68a724117c7d5ce5292cba8d8299bb969a70693361412d002972f77ef33e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:46Z), 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/QZFZ72568270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e92d32c7e042ec2d4fce18d8a61d073344bb437e2f94d636cfdf7a3ce1b411. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:14Z), 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/QZHN72520206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a97f7e59720439091bc91a3bd57960654db59734f5f16252155ea5269ac6b8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZHN72520207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9819ce2862a21c27ad9c5958bf40ed34bffcce576885e36670e357ee5fa0af0e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:50:43Z), 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/QZHN72520208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7f8d8ca8fe8e69271cd07f966c789fa7bb79b4508d4d3e331ec3bfd87a7c11. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZHN72520210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d095ee3e18ba0437ad68a053846dc48cfa3bd3be02e41e619d8916fbac3f938. 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/QZK6Q2598491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c07ef9199acafde1bbc21d37707f917284780c195adf1a1019d03c5fdf2b481. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZMEM2583939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcdb6430851d33d34992e53b6b49780e437759f90dec5693d77082cbcc09aee. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:03Z), 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/QZPLS2593944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de949c8c1d111f537db2ea63edcc2b860e3c1a7cdb7efde853170c98305e306. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFH2579457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26364fa8607ca2af4d477f53f8ac83026031b50b3b950a851136306d8cec25b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFL2504248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399142c8482f00215da635dadf3c2d99f5fb0502c2adeb36383364de3f4ac4fe. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFR2541078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748f2ff5c4f4ca7104d9e8913c4a3494dc913ebc64af3c9b2f7d1794e0358df. 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/QZZ7N2552570.