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 0x7472fa498a82545c71bfdc1c0e722492b8242c194b43ba7ea4868fddb1efb027. 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/27a748b2-55ff-414d-9c49-2ca4e1cd6222.json and https://artists.proofprofile.net/proofs/artist/27a748b2-55ff-414d-9c49-2ca4e1cd6222.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 0x6f11374ff7644c28d04367e5bcf055642c381a0d81263b7795b23e5689f0cafd. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ZAA019200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a01fbe6be529363a3604fb0e369ba4f5bfe86418d89c9ffc760d10da1630ac1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ZAA029600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d0b3a8286e1ec6832879499c415c779e1d9ff35aced384503db177f7c653c8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZAA029600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc417a47672d23c839cd6936756f8514c734201016c6f2d72b1b8de17e06517. 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/ZAA029600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707a004efb362e191a25821948c44ed66c2a4647cc8154b03e7fc91fbb8e2e89. 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/ZAA029600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8c727fac0e908254416efde30bbf83778f5e6d27a01786c6fa32ffdb030457. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAA029600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1100a2c44af1d2718c1ce4bcd298133bed8056be4f5054ab2816426709040f5e. 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/ZAA029600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7cfb11d174aa5bb5c75fa3e1a9df7d0e20a8aa7b53375afb7a804f24102e7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAA029600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266a57439c5e9034a5bd7075cd2da226c866ca520525f269dc4a771d086cb8d1. 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/ZAA029700195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463422f0d443bd2066d81f9a9f1a7fc7c3ddf79e93321e235e244df0ae7e6018. 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/ZAA029700196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf340b3a6e9680a11882eeb4f1954ba3b5925c34c009e6bcdead58befb488b3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZAA029700197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc250f8eaf83a20f26083bc0c142bdd15d652a38430aa4ae2546514da3b680a6a. 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/ZAA029700198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d391c16eade6272c914859b64c06533566c2e507a4935c93bfbf7ac34873c. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/ZAA029700199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddd7e4757ad7dd6cdfbf7e6feaff67392c5379109119776f95f5fcac3b839ef. 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/ZAA029700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507c601be66c3dbe4fae57b0074e6ccf325b5507eb46d5d88ab8b40d3c58d32. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:02:42Z), 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/ZAA029700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594ab579eb80b9f753657752ae1a7e8a4c08b72a3c6c5fc7a591c9ef905e305a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ZAA019200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ffbac4369a9afc403970659df0e44e06d4548e3e8a8f0e97c975decbfb688. 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/ZAA019200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f2d56d64852fde0f6bb2165ccb0d5ffdc9e3d0715a726cf04f4e2a4fe06f51. 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/ZAA019300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d819dcda4dc14430820a4b5f8ddc33dca010524c6a978bfab056337e38201. 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/ZAA019300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea679f03b1c968c9471ea9d24be4ea73d7c0853d59eeb15e5b92265fadc9decd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZAA019300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ba2e1c282967eb7b5a90a3fcfeb669dce9596a80954a97bf4607a02b9f57e. 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/ZAA019300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895bcb61ba9c28ed82f84b9e7b4de3d698a350ec798ebb935f10abbfa61af5b9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ZAA019300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22ba5684c53c85416401c3f1ac2f4707dcfdebb0d12afc4565d5761e8641eb1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:08:01Z), 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/ZA56E1402029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a71493c0106e9e81ac59f247869e939d0279464273013e25d00bc84dba3780. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:04:32Z), 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/ZA56E1405399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744a230f250110af024d38ac3b2d16d3b3662ce16a778106db881d0e9fd0f173. 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/ZA56E1405404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc554057286503d62b4ec8ee0cba26184a18414d615fbb31d7f9f4efe0cfdaf. 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/ZA56E1405407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ae49b1782e67b6949bc05a82e8ca07d8930848dc9f0be974a1d4cff2d300f6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZA56E1405412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda1ffe56d72a665c162bfbd2262789e9f265fe7f226e0ffa70128e255c60611. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:28Z), 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/ZA56E1405414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5af2d9c246f8f7388712162286c3079418d2fafe2cd16439d3b1e8004cc2513. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ZA56E1405415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387fd484ff767a186412b19d15f653ebe8c82eb616b0cc17e9d7cbb94e87ac8b. 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/ZA56E1519887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ccbd8927741b41cf262a7f97c66098a73774e310fd4e2116f3d6c02c8893b7. 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/ZA56E1519888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2557cff22d86dbdbb9fd62ea98949508654db74be5df22489466d969195e5ca2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:08Z), 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/ZA56E1519889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54bd39ba1506546343c7fe4c4d2912a31b18e0920366e01fc554c84a19235a. 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/ZA56E1519890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290d6790e1132ff55d8e8d98144c06a9395638a29172f49a41f93d4485c55198. 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/ZA56E1519891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b5f837ca19afb0545dc18f9aebf85e75cf168243a5429fa61f5034d54477cf. 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/ZA56E1519892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0902c4be9d3f8d31974319c793da66afd6457984915787c81c3f408fca8fd2d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:08:42Z), 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/ZA56E1519893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4328aed9a18dd2b1aba504fc003f0e3a6ec4966bb6b7603e079f96eefbfd89. 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/ZA56E1519894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6c7c23955e55821bbf77cee533b32c9526dc428fd230a80ab8c45f009156b9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:21Z), 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/ZA56E1519895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7f10b21c7f1dee8b78e3695493e474d0051963820209af37483e4ba9358ced. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:16Z), 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/ZA56E1519896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eef5c153c7578cfc4211cff2b3d0f5271bd177afef96a7cbe14afecf9a50a6. 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/ZAA641400266.