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 0x39b9887ad929862c4d5e79f02c5c0f01a2d62039746db9cfd4131791dec9f0b2. 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/3594f2bd-f41c-4e04-8890-3530d8685bd1.json and https://artists.proofprofile.net/proofs/artist/3594f2bd-f41c-4e04-8890-3530d8685bd1.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 0x0212c62487713dd58367064962c47f82d3bcf82246686851648c7a1ded06e77b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2225160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f521c51b1857f4fabc7dc3c824bb49ceb81c0d67b33559b30defc1c5ba6d3. 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/USA2P2256938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008dcebc1b8112b591680c67f0e76619b078259c865b60ea3d9fc06402ad5cb2. 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/QM6P42476452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f203a41e2623041ce84fd9fa06cf40fed999cafd1114d17c04fa3e53bd2a36f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2419309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3354b42c53f73235863dd15a14f81f44df19b49a9853e725b144fbc556eec423. 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/USA2P2419310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5680606106501e4436437f9bbf55a207931f526e6d7bbfdfab0f87120c457b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2419312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f66a001aeed76c040eca88be28aeaa5ca048944e072c147b5a0e8d2dd5a274. 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/USA2P2419313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d91738c299714097905a352ed83d74b677d6a46a967f5cb39697b7e8c5cd7f. 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/USA2P2412866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61bc99f5cc661f78a8f66cc9b4101dfe7c7095d023d857d0b4730a671a65da4. 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/USA2P2400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d91738c299714097905a352ed83d74b677d6a46a967f5cb39697b7e8c5cd7f. 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/USA2P2412866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7d716e6b208181cbd35bcb73648c9e92549b61fb2a652aafefcc0430f98f25. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2344679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ee42092b5d2972bbfeecdf260acbb89bec14e8e627ccf7636ff439f7fc9388. 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/USA2P2331254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b7a1c6b66a0da8423778b60be3f74f85c14d78f0350498a3e3bf621c09860d. 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/USA2P2233973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922df284f012068b40f066c203dd8b4e80e71fb1f574d86ca8c624964e76c534. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2457382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569d2b7dd61d8fcd46b9fc983cd8ae95a66e590e1af72fccc6b6783eb92fa3e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2509811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1ee729c03316b9d4d39302c254fcc70ba4c6c6a18124059b3aeb5086d7805. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2512421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe459e637e2fee51a5474a5f575d4dc8a4ff1c67179cd42c4242ccefda57a7060. 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/FRUM72500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8803a81926d5267e52be49049c40e849da2e420131ebbb88a621ce2a8b3e7d. 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/USA2P2457622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44968d6e4425d60bd6fb6cdde0879b5334d8b52d1141de8d96aff24f58bc04b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0Q2347703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dbe747f02b9383f4b55ea70e1a327b7312fa5f3df1f71d1bcf3d3f65713f45. 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/FR9GL2407070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0d91566496499c6c4b5253d5b2814245a2ba05076bc06fb90b7888c53c54ad. 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/USA2P2360847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f7a1e936341cb1156bf5ac8613a11bde21881e88c7857f29fbf99699469d39. 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/USA2P2354625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc344e2723ef530e11f2573a61d69b9693521d95e9bccf3b05c910e8b67b5807b. 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/NLG662300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7aa23f3a6fda5f81e2ce82281b10e4c9b254f2d71e04595b4de21a30886413. 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/USA2P2335882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856f32aba3f4d6707badc26a589a4e2153bfc20586040a8208941c5e476b392c. 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/NL5HJ2300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4765d632e34b16ca4f10a89ae2983ce3eb2265cb231e6d71d4dbe55362a0dc. 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/USA2P2322471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab3e146260bdeb39edcae7c40b89c4bebb24e70bb9cf1921a33a819ce98d9d3. 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/USA2P2261582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ae3f5fae63b146c125463f1930e36a383951223446217047b40829457fb642. 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/USA2P2260893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d447310cffc77bd687401ab1e44f824f5887efc05a2755dce1977a4e3705d3. 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/USA2P2237247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34e80006ca14f1d3099ff64dfeedd9ae82cd820d221a0c945f00eb8951fc096. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2231167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357da1ef88e16cde706f58ab65ef0f72f5b17ee4030dab128666cc97d6384ea5. 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/NL3WA2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3a28c085e9c6448151281c068f95c44d6973254852f87ee77e75207db8e82e. 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/USA2P2215126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d0be3f92e979228af0742996d5041605ab2c674c34cf7157d3f135aaf9853f. 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/USZ4V2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7571d8a1e5cf7967aeb76bd6b4e103ca50142cb218b000a5a044dfa8528c7cb9. 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/NLRD52024483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcde64a1a9e0f00e3624ee7bf93f60ade6540667e897b514643a68d20e07e81. 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/NLRD52024490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a764706173be12aa27c168e21265ef0f9155cc4e62857bd101bb55fee7e57b. 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/NLRD52024482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d72896a1ed7f4e629420c5870f2c2f695c1c6dcd9b6dc2d0baf67426ee6100. 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/NLRD52018943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107a0401c36264597f54c974fd16dc8c16b34f6e17a7287f0123271980242a57. 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/NLY9D2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64b5b38f47b2475759b29f49f3e0362ed24319f36a4c3a1754c2d573733eea5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2225784.