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 0xb4037d68755c5e10ee8ae56ca7981bdefe128b68df8603308d9726d49749a767. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/982186ea-d121-46b9-9aa4-17c140c08265.json and https://artists.proofprofile.net/proofs/artist/982186ea-d121-46b9-9aa4-17c140c08265.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 0x907b6fd6e5ebcb757d4984a4cd828190ab58a1d78d1043a7e342baba2efc07cb. 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/USAR12300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f80947a43cdd55f5217f9e326862e538553bd4cb04f98188e7f1889ced1fdb. 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/USAR12300497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ceba0e492e36568bec30ffe4294846d4dc387036033ec9e87c0f010a8e2b0c. 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/QMTND2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb6cfd20b7bd299591ef749af8736af9d9f09d5cbd8a687b1984682c191c4f. 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/QZNWU2033549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03543149545a618acebf74425e3e20b47a5a41f099a0dc35e3231358a006ec0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWU2033548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0564b512c0c667c262b0f18a590dcf48adb97ce7f90b73849da066adce3e3cbe. 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/CAN112301281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800b88f962ead5147bd6d09bb7f7e347edc721a2c2aadad2cf977faa9ebec584. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYY1907624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6edc88c6c57e833b6a4f4c18051ca8b365f94cab2af59913bc7bc616c1b2abf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES71857451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab17690a9c2d1a3a7e2ed8f51231dcc302cdb90c77151ab27e72bfc4dbd75c64. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM24S1927959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d91b81f31b2a2532a14d072b144a4b82d7ec8c3758cabdb601cf64de7124f95. 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/QZFYY1942830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba7fe23754c5cb989247cb1abdd4e166faaf8cdae627bb0908258e4c908d156. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMTND1101642.
The Gift: A Christmas Compilation (Deluxe+)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba7fe23754c5cb989247cb1abdd4e166faaf8cdae627bb0908258e4c908d156. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMTND1101642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3304cddaa8054d92de7b7c03b502bbc00c759d450d5672855d9c725f7e74a05c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ9Y21793571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3304cddaa8054d92de7b7c03b502bbc00c759d450d5672855d9c725f7e74a05c. 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/QZ9Y21793571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc6f289c1bdd22d2ffb35272bcac0bea05d6300fa9cb468d1d4ebe5e298d1b4. 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/QZ85M1932998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0871094679a77b4af5beb6a74aacc03cd7411ad0342e4a1ae414c38a8e3ce. 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/QZK6M2057898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d443c3d0455c197f4a55324da016f44155ea5753e5e4ac8c497850537b21535. 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/QZHZ62078939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba7fe23754c5cb989247cb1abdd4e166faaf8cdae627bb0908258e4c908d156. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMTND1101642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfca41fd08507fb84d64996d1e3f4ff57ce33e57d09d207f7b5acc2b8ebd2880. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFYW1992980.
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 0x470f7479630563cb90c1dff4a2fe0a578f0a12a3a5fb51d7779f5b3815772ee5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USZEG1700131.