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 0x8f91d91e8c50f9aa88dc0ba89411b073c349a289d77f0ac40c2278788352a723. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44f18ba5-3415-4709-86f8-164cca1447d9.json and https://artists.proofprofile.net/proofs/artist/44f18ba5-3415-4709-86f8-164cca1447d9.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 0xafbbcc63a358c44fd13227d123e7b3d7cfa7986443aca20da3503775017bac9c. 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/HKG731790376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a7a02a5c30daa0811f2113c651be8700d03e4dc8b00cfb84a2c4d12ec34f29. 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/HKG731790387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314615150130c6d24cdf5b494a03ab9f009bd57995dd0d8f840be4f273fd7997. 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/HKG731791181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1a49794e8e85188cfbe21a0871e60485cc295e895d7847f468956d711ea0ac. 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/HKG731791187.
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 0x3e9f03997340bdb6413d82f2ab593adf6645f5461032759e2540b143e2102d88. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG731791190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e420c6120b956366f6a6afd304462eca891101d6f653464c1c2c8227762496. 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/HKG731792837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fa4f311a33d266aa307ea511fe0d8ad2901906257eabcfb88e288a6ab3a2c5. 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/HKG731792840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf59bbf57bdda4be4257bf7888de03779f065ad41c5e61eabcca06b271b022a. 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/HKG731790773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40322ed8913ab642ea82a434a8ca89c00901a59f1414a8c1f5234526f26b6e03. 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/HKG731790781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6058e55e74bc6c2e208c6d042903b8aa03975f41e2a580a40d5f77488d2d31da. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG731790775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa464aa8f1e95f5575c80f32c89e517f5839fa79c8877a8a3e3b9e226df5d2893. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/HKG731790777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8844a29f11bd1ee5d10a04f8bf390052e424157cd97ca3677c291fefd65ef2. 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/HKG731790778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f6804c025e4ad2049f75bdf513179ee6d437bc5ba3845380cfa1796f12143. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG731790779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c47e69df005c3ea6af648dc02ee7067c830608159e604b6b19ed7709815b02. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG731790785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be85fb20f0e851efa0a0fc6d50f26e2ac5d73cd3866924b49ce410f9008c9fb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKG731790786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc003772ca899354a6a4e0abaa834d70156713504605928acae7e37f8773fe18e. 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/HKG731792649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73277d1c4654883854de853237730766b3910d0d19c5f899dabeefa5973bd68a. 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/HKG731792650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bc255ebbe72fff23b73359df1e00753275110113524823132079d089b4b3c9. 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/HKG731792644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d826e57458274c09146b05060ced9dd8a9a2c0457e77c02392a4d10ddb532a. 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/HKG731792645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e559713afa7ee15b93face6f31a4828c824b8d7853049f4c06e25d043ff478d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HKG731792647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3295a5b9f1a333e3a611313eb0e6b635af6a133e5d46a94f88553c7b2de5c9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKG731792648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d89af753c5499c98064e6aa89bce41253fbb857838b98afc0477f014b40171. 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/HKG731792651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa9daf4f6a0581d6cd141cd6a8d20548d15de5b004ee87b2f9f733cd757f797. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKG731792652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554b9a45185c545bc275ee09d7fdfb03533c8b0e801657b1ba40b777fa4bbb65. 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/HKG731792653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ab9d0a75ae8abc44ff6232db531005d38d1da38f5047b9f25e753232a42a5f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG731792654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f968b3be981c03e668c557710a142f3af466b575ea8d014dcbe36c8c1b4d79. 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/HKG731792655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef600d7abd79dcafa8f188867390a458bd9dee5f41916c4113bdd3d3db093770. 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/HKG732417252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6617577b4a91b5aaa06cf5b288289add65ae2e63eaf3dffe661d01d6cd73e23. 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/HKG732417253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03223eb7c820e48c2d741685ea27b0eb77c7361f09c611ccf4994095b79142ad. 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/HKG732417254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50767cfef12aa2e3b8071c7470241331e85d37acc37ee5eddc2f6d1fa25fa650. 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/HKG732417255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda38cecbcddcd4e34fb874910465470cc5bb74fc1e0c48434f6b8ce2ef522efb. 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/HKG732417256.