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 0xdbe117086ba1d3b30c75f74b9114108d730269165a5af07c8f9e9733e4191a4d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9637c7e7-1e21-4622-a88c-fe824eed4260.json and https://artists.proofprofile.net/proofs/artist/9637c7e7-1e21-4622-a88c-fe824eed4260.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 0xfbbad5963a0ef43600c57a838673a45744419ba8c1b5ac40ce4f36aca7798362. 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/NOKXS0502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83b6b68f0829af3559419e8161f790c6385923eb5dcd18a8d79fbbfa9f3a320. 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/NOKXS0502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fdf5d79a94f78fcbfc981b8af4171cf302bb721469cbaca62105f369bde6d4. 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/NOKXS0502030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc083184612a47518264da721e33b78bfaf85fddedc6d8b526208ff6c63828d58. 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/NOKXS0502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeab2ee1ce37c3bc443bbe302994e07ce27f9522be9d42cbe5dbac7dbf179d25. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOKXS0502070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2835558e58192fae765d5c049024d1d2502d124aa5c8d6aeddca15332961fce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOKXS0502100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5b4f2be9d049c9e779446e3c2e5d6a115e6e363013820c7bdd6e6d13ea5be5. 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/NOKXS0502110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014d0c8f7f0692261b817a989aa20b0c1cd3e5a660f429cc03ac5e653108383. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOKXS0502120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3f597d13f72cf386220c87cf937bfc834c82ef2b0a7dfbe846684d34f807d2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NOKXS0502050.
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 0x37342e92d29183e142ed4f11571efadbfd0a567e505d9abec99e9a1af57495a0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NOKXS0502080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915caf15b4e45f522841ead20aadd6f7a752627b4a9f7520e85a0de78bb6ed5e. 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/NOKXS0303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308b2d187af238b164b4d2a629480a64801473cae8c2ffdd2f3ccd85bb3ee3b0. 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/NOKXS0303040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12691d43ecc593378364b0b25bb082b899cc5dc5da5adb2feb0e1d710fbd03bd. 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/NOKXS0303090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5696032baf53542372739367d969c03d24f10cfd65d3f13acd85aaaa8b0625a7. 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/NOKXS0303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3f53e11e3c7b33e6245b395b24ba7d5278fda26582fd53e047c5ab957361d1. 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/NOKXS0303120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d22e467dac098d081f29b5e4f5d942c043864a0b17156fb619f58235078b9c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NOKXS0303020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5cccab3c1e7af263299ad43ef439deb0eaf5ca531ac98ffe635bb9d30292d4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NOKXS0303030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfae3e2a5a825731388ec60fa84a6eb7b86b65bf194509257b950ed59db24f9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NOKXS0303050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a16916c8f54f8f622b366bca1e60eeb5e26023b8be2644feac4deda9a6090e7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NOKXS0303060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4867a28d68800e98c532d702bed2ff19e69f797cc61facd61b1619535e5a5a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NOKXS0303070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e39bb717142e63039a3e53e6305ffa707287d16027ad352267b325b1f691a4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOKXS0303080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8794470ef1abca02ac6723ece657e3d65b50ecf4e45efb335adc1359d1c18210. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NOKXS0303110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc053199bc2d15b3ee397f1654f83c825523c17703b8a26d104f0a562cf77930f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMER2347298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8749e4c537946708e6ea2e8c6ed0d315ef63f1fddc92e61f9d1fa2375fc93a2c. 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/QZHN52365646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8dca47a6b332fba85e3d8ece1d38bd9a154fa428a9bfeca87ce6f5a40e1509. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNC2277586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41c74dfa19c118ed7bc4e206843ab88bb09def3776eabc21cd3416093f75ab7. 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/QZES72119232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490d8343555d8d03a60314818f0a07c18136f9cf4085c1e8054da7a6d7498408. 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/QZES72119233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421d30192dc474fd4ccbea4d7ffe28c5931c3343e764fa18983f69979df35280. 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/USL4Q2091587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8128c306ae7d22bf5065d088f1be8cc360d10e5abb90c7b937c74a2400dcfc26. 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/USL4R1937038.