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 0x2e2091dee19bda33d40db2a3159d42af1828e8bdbeb9434bfa89c53f53763e0a. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18bc362e-4b11-493b-8878-8e6aa80c9fd3.json and https://artists.proofprofile.net/proofs/artist/18bc362e-4b11-493b-8878-8e6aa80c9fd3.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 0x8f341a6aade9a248e408dc02d50906a50e215f64e63d081c6766df2a0b1bdcfb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATR981336613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e301bc0d59023e77e600436533aea80fabeb96b1c9acc21c2ee5b2dcb195ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATR981336616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98070842b45490892eada03e0556b7ae872ede0387d49f5b449d354bc40373b. 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/ATR981336619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b37c17b8e332db08b0b2443493c761fb63fc12742d84b72812171558ac0e78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATR981336620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf28b20c67d49e9c69731c2418ecd6655a1c6090947d60015eeaa45b01101242. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ATR981336622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e56ff508f8cfac7d86b140422314060870d885ffb3185f558602464f74987f9. 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/ATR981336626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a37ba736724cdebcab45f2a82148922c980728435a44b63ea62a0196c7e09bd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ATR981336618.
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 0xb84f27fac94c1f8e15871fd3de36b28dfbc0674abf2e678336e060f73240cd4d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ATR981336621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f004c57507d69ce2f57ea0455b9800aaeb8966f0816336995ea1b1ba67d9c1b. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ATR981336623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf00547e506eef808b165332f2c31bee87643fd6741b62e111137635054a0776. 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/ATR981275685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5513eeac0ecc8635d8212aa283cda2a72afe2bef6579e6c65d2b5f7b561dc05. 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/ATR981275686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b52006ecc57c61d214d9717ba0b298913a39ea8b63b91417baf668b0a52988. 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/ATR981275687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12f1d06792aadebfc395e5604884288c0387ca56eb7bef39e44cda66fd41a46. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATR981275688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21c6814e2c7ee866789391a5559cee63c0dd04ad86825521d1c096b32a15cf6. 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/ATR981275689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f937ed8dd0f96bef100f3cf6598143f4762437f3cf0b5ff686326de475f7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ATR981275690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d11afecf95076c8353e8b449ea4633e19999888a072f540a452da3147015c47. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATR981275691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91b14cb7e08e0c77737a3e5927fac0ff7c9de8ceccc9be7897a2553801f7279. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ATR981275692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61039406871240265ec061ac2c80867af1525f96b43cd396376f3647b509611. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATR981275694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d85020c423c25e4a4ae0d74b007d6e5d91386bf79c656d1563b85bb5386a281. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ATR981275695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2bcbe612901bc0f9a4575d12317de568cc376a7ebadf7ffa752cde5d506bd8. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ATR981275693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dab408a2ad4f3d5d344d069a3528b2ca3fbbbc6fec7c1a596250a637fe781f. 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/ATR981326498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8366ff34e61671ae0430dc3a9ac2ae5cb88a13d8c22e648c056c78864f8d3a3a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ATR981319439.
The Castle That Keeps the Dragons Frozen in Time
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b51a96bd43acdc292163e55d4cea79bc072adcad84f3fdf18c0f60a0494f1f8. 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/ATR981315177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af77a15e893ef60fb3e23ac163a8daa63e9f5a6e6350ba4a48f9131d493c0cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATR981282720.