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 0x1609c089bb6b456206e627f06cde11575695a7a7d0ff8770215285cca7f25a8e. 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/f2270a1c-6175-407d-843f-20bed84864fd.json and https://artists.proofprofile.net/proofs/artist/f2270a1c-6175-407d-843f-20bed84864fd.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 0x98439c9dc4b7ab1a61e207ec885e1cd56e39986a2a51aaff03332afbf16288cd. 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/ES64E2204318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd4674ab2f846ab99e4a70fa87e4fc19d701258b7016306b85fcc244df2af95. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:29:52Z), 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/ES64E2301880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceb44bdefc4bd95544f62c8b3f03f951c698f2d99720f02cc206073d0d3afc0. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QMBZ92340055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d73329a4477e9ff8b6aee27eb87b6fe71c9a11c8e197bda83fe657a531d2291. 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/QM6P42448859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1669acc26bfcd88620e1c228e5197e7528888c94d310d003e3cdaf9f7b9177. 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/QM4TW2449056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26e22d3010c137edc90ebc0c87fe708c096906fcf964b9fb919e63310800d48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES64E2204613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63fd7bc08dc750031edcc297336379063490d2d7171b288be7f4220109fe192. 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/ES64E2203046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ab0437bbb673b7e4c166eb65c521677e0e0c646baca7ebffcb6cbcee81d80. 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/ES64E2202657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d281908d0d63ba68ff61b355a5e6f3a3c20d2f296cafdb016c5564383212e64. 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/ES64E2201709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cddfc8d66b958a294acb30c1983f6fbed1b9472511f72aebf4cc2e2d91b358. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES65E2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99abfb9b2c42f3524780ac3357ff4b2782b4835dfdefd1ac75e32239cae78d65. 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/QZRP52148818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eebdc5c3cf7abbc94504f7b288149bc73edb87d96828b79b0022b9b67abb6ce. 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/QMDA62175265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23b68cef9bf960609b9b25ed90be0b709a63b63b71708d9da0158f16283cc59. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52184886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624a6534253aa5bda0cc99abc831ce4acca3da110cce5ac3f302f5d5754672be. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZFYW2192635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea3621ed9f76710cb6353bcb64d8b4906c555f7f15d747d6e18e1f1bf6f7d6f. 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/QZNWW2068027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe453657b7726986835f3d14a9c8eedd8da389953f730ab228c66d3e3751fbce2. 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/QZNWU2087412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b2a63f3520868125e304dc7530b3dd577ba1e0e6f99644f1016c98378ec6fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWU2040236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8fb6001ad09339da2f42d420cbd4eca743f9b750f05151c1b68d075f606661. 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/QM4TX2071960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000b3ad750b1c03543d0abfabed7b2ca8d8feaa37a53e9bc00b4095366aa4589. 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/QMBZ91966293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a043f29219ec5ef0ddf2187f25a5516800002a4584dd833cfbbb58e4ba33fd. 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/QMDA72144595.