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 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 0x02c1090744c19c9bd2f1cd929ce63e247c63ecf846685c25d87e3c4f0294860a. 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/2e2b7909-f203-4a32-8d05-46c0a82f4217.json and https://artists.proofprofile.net/proofs/artist/2e2b7909-f203-4a32-8d05-46c0a82f4217.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 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 0x4ca5fb8f6887e114af01250636c252e983a53c5c821c613d3f8bfa0fdaddd221. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWX2153970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c14f527a274b1d6c8c5290c734d80160e3a3d08413bcae0c0c1761a0eb8c81. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNWX2151014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cbb3a385334461e4b83782bf271330775615f426db598c09b926af2cb0de7e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWX2149473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4919e1e543d0c39a9b65cca6fea3df4977d0c64214edb656bb26428d232e746c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNWU2226084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eaf640f86bd7f0f43eb0b0a614b21cc675545114f9a7153e018cc2cee9cac5. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZNWU2226085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6180029f10c4d42e0d8ee24d41c437b8e498b2af07d26faa80e35c7104131550. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZNWU2226086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c8521a9147ae97937814f565f2194898bb4014140f4e9dcf2b1aebec1fb2a3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWU2226087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d3abd41b5a294b82247a61c8b21c3e1f5fb40411afb491f6b11d31c524732. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNWU2226089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cef4838a22d885dd23f2ec1114e8c33b92ccaa306236d091f3c33e125cc0b1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWU2226091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449525f1ae1efb4d24a13eb9b6183c758f58950f12c6a65b04e1aab2e0c20ac2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMEM2171526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3c42f6304a376bd5088d2591a07899812ff0a4a23ba39437ce35de438dc105. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWY2381079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450e81ae6ffaeddc6ae57d2e007a9b61d8136932929a302401225b4cabec7027. 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/QZWFQ2467161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51100754c9a845628c8ef2b8ecae77e03234ffe96881f50f0edbf9e7b5b317cc. 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/QZK6N2285491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977b17e31de42da2e3a6f9d37ae8f682037481731bfcd1e9f489b8254e33c31e. 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/QZTB82310443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa19332fda4cae6bd585a84d43f950acae955abf43d16f36146d78b2f620bcf. 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/QZTB82310435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1740dc2a58457995e135a453b3bda4cfb0f4f2f3dfddd04840a7c37ae12af79. 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/QZTB82310436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf894fe0f0ffd9487dbba51bf02e5ab56153caacac0409f0deebb306c78306a1e. 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/QZTB82310440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703ee54c98d593412b44fefd9c469726184ecf21b19d899b5e189d905c69ea11. 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/QZTB82310439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e28e0716dd66f4e2080b03c011f53a91beaaf98b1fafe24d6a57a08c4993fd. 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/QZTB82310441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84374c623f8ad05c20de95c06c86796d0560715db7be38f1763ec1d0b2bc1925. 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/QZTB82310438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e53ab1ec4793a8d87ff382c3a5d2075055a0a38945f283f976e912e8c8f04. 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/QZTB82310442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c64c6fe9ac6d20c406f41b64f6449fc5f1945f4f5883626ffa5ffc80126d5c. 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/QZTB82310444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebd8f2a71a30eb34927c1ae6ee3ec9272ee1dd8fc867aaaefa2a01b03b511d8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES62321614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1486628257a62db044a8a83c35a88f9675b3930b6c5a8cfa88e1908f054d60. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USJ3V1869499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6979006dd15ec7cf693355bbf6ceeeca2118162bfb7069f79dee8a3bb95c27d9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DELJ81933810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b42b413a5cd23ff8bd315a7e7537d03f113f05a02e2d34591472763a92dcf8. 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/DELJ81905575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f360fbce02042c723a3708601da583571386b1dc63918b92d2aecb692311cb. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DELJ81905576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1201146c62a267f407bbfdea9ce4c4d8bcd14fe423060176b3a7f2da480ab579. 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/DELJ81905578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb280b09f9833c03a59cfedd33cdac59f1f23052f590e88053751a6e659c4d7. 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/DELJ81905579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968c41a7d5e820d583164d09229affcdd42ed89c949e1f315dc8e85d1791b144. 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/DELJ81905581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6891a9451f4703b105c6ac474d2e4d2cb5edb9ff946cd5e20e4cc5fd66c408fb. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6J2420439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a26f3bab5d9b5d89e253d4968e3d6520746f2c8bd791facf7f152bfc5ed04cc. 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/QZK6J2420440.