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 0x3efdf221fc3452b2814adb47e6b9e2aadc5077dd518d70a82600d977c0da320a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ee9c73c-d536-4c10-9064-983cafd72958.json and https://artists.proofprofile.net/proofs/artist/2ee9c73c-d536-4c10-9064-983cafd72958.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 0x8ec3e885be0788b8a4e9d5fd69ba789fe68f8a408da0a528abd65257490b2d7f. 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/USCA29101752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dbbb0339ea019448ffdde8204227d1f6e42173c833a9e2c27d028831f662da. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCA29101754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5237b9f6dbc57e9c0c715d9d71026c3d14a2ff8dff094e57d03ea79e9c0155. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCA29101755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901596c260a6a9eab0837b6168e45cd1878186da2ae8bd9dfce23f95e08274ea. 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/USCA29101756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12d54fe695691939a26c97b79f6cd07920f0dca20e257993002fce452f597e6. 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/USHM80428498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abd1d17eef2d4b8b4ab313ef8a927165f55e805008e1c7bd4e324c8dd34e06c. 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/USHM80428499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b982e79c7c0ece7630fb291e0e3e269cee337b576f01244ad98d22c50c1caba. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USHM80428500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec8b859bf231541d5fd2b47502138345e3b16b86c407863d3ea6ccdcf0ddbfb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:18Z), 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/USHM80428502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd2ad8463dec969ecb7184eff7e656bb59b5b122d0ceb86ab2056d194501817. 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/USHM80428506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65161c6caf03fbc3f9aa82516ec24e3fc260be810f9a41f226f051d13b10ac28. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM80597256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c0ab93cccacd3524f39f0a3e785e57c73dd328989b89639d1b8c0b14b76a2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:47:43Z), 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/USHM80597258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f40037933380e22d01ad4e065d8e9803480a6af72787a07e8375a65867bc8ac. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM80597263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3342899f9971fd68042eb73956755510712ec4bbe1862a275350972094af960. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM80597266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d14da448d400f0d2937daa3a55fee494e627d8563a6b37b643628532c98bb. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USHM80597269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5fa7188c788d9412cf938684489038e1b83e69242f8567a55c247de53e1b06. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA560659497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de567b0bf62ac44bdcde7f3fd33048759c7ad16a109269a6fc00c65eedaa135. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QMFME1305161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8b206c6fe5a42770014ef33a92d1427b14a511ab5206e3bd0176da292250a7. 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/USCA28901027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91c9ad00dec98c9ec910714bd0afcc2718f30ee430036c60e7f9b705fd9c0e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA371178062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3964e08c99309bd6a60f299ba8871f895b0f6c4bf6db7e9878852acbf858f3ea. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USA371178273.
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