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 0x319dfb7b1c5cd9bfa459b7ea6a9779eafad4bb178c391fb8a7aeca7938329638. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6132cd1-2d67-4064-a300-0f934c92ef42.json and https://artists.proofprofile.net/proofs/artist/a6132cd1-2d67-4064-a300-0f934c92ef42.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 0x3196195b5f3bb1bc94386edf13a18d7befb8f6df86b65db981de4fb702045cb5. 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/GX8KD2266296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184af9fb350b8fd84398c222d30e1b31c8aed46c9d57fe76680ea99388a9b26e. 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/GX8KD2266374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe578a519158142ca774d569bff6798ca281409978b1308a9ce60c893534d4f78. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GX8KD2266504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a18ac8b05895991520108cc791ea2416bac29b2dd74b7b6bf86d79bce51a9f. 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/GX8KD2266392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1127c0a1ec788e55a5262cd8b0a52f681dae4a39ea4db01485a00331fa22b9b3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GX8LD2252916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ea882cf00b9f1db4dcc0d9c29a32192f8dbaaecd996ae4e4a9f74f4e47420. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GX8LD2282913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd623862ced3a0d0c0b95f7cb93a75133d2efecc25190744418c7b71b918e3718. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GX8LD2240366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7b4fe9030895272cb70c89a21cfa9ecc439dcaf657a6fa4627283e2f9c1dd. 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/GX8LD2210712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1756d5b279aa7fe853e383469f03fe8c2b2751491bda263bebff4da100c0bf04. 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/GX8LD2207027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8702f1b1e17bf066d4ca796993c9e8e4902535af71504ca3e80ea2913c0c12c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX8LD2223004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c3590ea80e3dcf374b0578fe5271ecdc4f8d1c6a883e0a4f05900ed15cf6f4. 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/GX8LD2229850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3363e6b39b2b0090e81b012056bfaa4adea71d1a617dc4fecf2e3d172bf914ea. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GX8LD2206237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a0de4d1213c427faeb45d34910afbaa0fe916c585214f12c86f871d659365. 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/GX8LD2287284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dab891af75291c16649abacf1bc0e38d2697056abba466eb7a2b165449c5f5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GX8LD2224356.