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 0x13e12d1722ee63f53280de20b9e80370f8fbc14b54a0bd42f3287f986516bb83. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c4aca68-343a-4047-b382-63a77cd34b3a.json and https://artists.proofprofile.net/proofs/artist/1c4aca68-343a-4047-b382-63a77cd34b3a.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 0x4557b73ed045f36cbb5b22d0796036fd0bdc30541513a2cc68691f25a8263eea. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USCGJ2495425.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda7b2774c6d3a6f32828f53293944fcf2ab83e60e4b885ebc4ff1ab8ef5955d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ8A2500827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b40a4a7def269ce93da2482bb5e45294ff5ec26d1d8c3cbcdeba127e4eef11. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ8A2500830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00345c55544222758117f1d468ffec11862e1db2647a2c67148992fcf41ca421. 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/QZZ8A2527943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e481ebb0dcc7a9ba4a9a99a2f93c4984abede983bbd654338e21f2f3cd11fbb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ8A2530675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35f8f0e85b202d27d4a158ab21c1bbc842f27dd5c4b33cac5265f5b87596405. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ8A2530678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b62785b7270372fe3ab4df42d96c10568da0c089e1fa7aa26bbe6bbaca104a3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:57:50Z), 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/QZZ8A2530680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b78b3acbc35cf1766c4af588b0bcc90488123080cfd24f0552f0481be915dbb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ8A2573731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1603a001bd3007ca9ed473868c48efb3f31155366caa5e83289a81272dc298a3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ8A2573743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0843f62d89bcad0814ab9d31d0b59e37068b401d552ac878ec985dc441316866. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ8A2573753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccb2278dd56781f8fb5a28d4153880b37ce3a11fa3c34bc2fcac777afbd5400. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ8A2545271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f42e5574298ef1e8a0ec477e8e237ce22da81f3775df668dca9783ca10d9a2e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ8A2545275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8702cb4ca555b981d19df89d98a1f02faaf4f381840e75720f90de6b8e21db. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ8A2573691.