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 0x7bce5405271d07b4b4a74809c8c189867eff6f9f204f7918f9217a5523f3b546. 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/a2adadb3-6aa6-4597-a8a4-cec32f39fde5.json and https://artists.proofprofile.net/proofs/artist/a2adadb3-6aa6-4597-a8a4-cec32f39fde5.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 0xa22c1a0994486fee66443fc987164ccd52b9cceb7fd1d05f47fc77a3203cc6e8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:50:29Z), 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/INK602101644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4095ef0119ec09918803069ba1818199b852e2dc6c08dbec309a26d79785308a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/INK602101647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a75968b423a7e356530a29540644f4befc840e55a74eec8baf933055db39a3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/INK602105039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705315d5d62bed3c95bf634e39578b3193e4e374687622d37d5c1d963eeffdcd. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/INK602105043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60891f95ecb222c53c5d1345c4085fff8b88a6b7852a6dbb216990993dd1be9a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/INK602202798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324b6841804177eea8b9da21132678f7a235a65d13a8b3f6506bc40dbbb61e3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/INK602202855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313c34be5bca3a2a62d3e3e7e84a6e2a79eca3b0102c06be10c78b7af4cbde3f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:33Z), 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/INK602306594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50672037a1177c82cf2f2a1d49d797f7cbf894e63480ada5d1ed790494ab79cc. 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/INK602306595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6286481d1d2764208543cb6f9ba6b6c0a9b8e79e1c5ea7ff5a8d1d699039a530. 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/INK602306596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8df9a180378b3af481c6ca9209747954c37048d910cf5685b5da5ff88509747. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INK602306597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5be10270e85825827569adcb77fdb5bdb660f9a15a93f37ac7d074a4180845c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:05:41Z), 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/INK602306598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a39fd81efe2902cd2629bac431bf92184d927d2370ac03f182288f5d889a90. 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/INK602307123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacb4b94939767c8ffe400a2a1419e60b70c93fa570ba6e6e5fc6959823b0bfe. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/INK602308949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9862baadea42b067a331c19367cdaead946f48ffe33cb38b4c9024de640cac56. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INK602410738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9424984224a9016faf0f8a75fb812fd72829db026390379b5ce963f4324c37. 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/INK602410739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396abc98f7654c8cf8007f6d5834c435e39faeb04699cea8000209e33becc686. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/INK602412792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd8a3ca0ec97f432696d38223d5b419ac3569df2bfe717d524c55a7b0e58c94. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/INK602413634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f89ded0a0a327776c7c5e9cf8ef8479ea98947c73d9bf708cf22bc70e9c255. 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/INK602413635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05de17522d5ea435b34b17ee1e6bd02c7c7a9d205da34e74e01337a5c199314. 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/INK602413636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2fa613d92dff7f0a2ec091569f257526a0a2db52d6f27b5982a96a9c1d8875. 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/INK602514538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aad1697577852e65a736d3fc1b5bdb65724fec0729c82199f6c9edf64111ea. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/INK602514539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f74aa7e1842f77ffa009fb5124ec761ac7a273c3b26a31d706b024da793a3cd. 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/INK602515287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a7f6294b03ee1e3f33e9e064c18a6fd3dcadba56aa890a22daf38676cc64de. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INK602515369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ebd7e79358996fd558bddc8514bda15812fc4dd64e62ad7d2ddd421e9f360f. 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/INK602515819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdceaa7e07ee53d05e84455bcc375e8406c339eab66054e73d7851c9426b37ed. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:10:12Z), 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/INK602515820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c22c62a08f7b069605e127c952376d2fa0452677204a3b78a588004d6615af4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:04Z), 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/INK602515821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0562ef0d439ee02c64598228c8c3b1862bcd02e7d6e36eba9821acd4ad97d619. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/INK602515822.