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 0xcc932b59460b99f879b6d492e3ab4d1fffee981e496d42e8d93aba79609a6522. 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/43d5d478-25ad-4606-8292-77de24044c4d.json and https://artists.proofprofile.net/proofs/artist/43d5d478-25ad-4606-8292-77de24044c4d.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 0x7fb6035933ed965d5e51058eb759ea2ce1ed7866c10b846e6a77a86e3a838433. 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/QZK6P2020007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb13ac20f0a0dd8b4100f495827dd67123e07bb451ffacd19e519839d8c5e57. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNWU2044687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ec4ae4dc4a16f9ed3cb4e057372dceaabcff544c9e229ac285be1273b52ec. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZFZ62198381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f51c75c8916e23fdf762152348c62543eaa2c289eeac1089bf92a60b560ad. 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/QZNJV2124418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a47c85ac51167a1d56c383eb47f8ea141d4939c24ebaf3c8857e9de1c5c3152. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFYZ2210420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8de9cdc751d88c4b3e0847511f0d884795cced7aec1be139916c79ac20a79b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZDA52223825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f31a3dcdedd3d0ea74e8a2a8f4adb3b0404a456fcfd5335abee5a65c4cc698. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZDA52223826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a0c5ab39bf45ffa97bf811e2496f5ee3b73cc00eee00adbd6704e42d8dfb9f. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/QZDA52210576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8de9cdc751d88c4b3e0847511f0d884795cced7aec1be139916c79ac20a79b. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZDA52223825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f31a3dcdedd3d0ea74e8a2a8f4adb3b0404a456fcfd5335abee5a65c4cc698. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA52223826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a0c5ab39bf45ffa97bf811e2496f5ee3b73cc00eee00adbd6704e42d8dfb9f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA52210576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609fae6460bbe541bea831e6cac3b1e2f0aa9df6514208111529de1eaa63e8a4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6J2273764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609fae6460bbe541bea831e6cac3b1e2f0aa9df6514208111529de1eaa63e8a4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZK6J2273764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a09e7a131ad4827d5d89ba63481d368db5a0a015c953ad06d0a355b08166469. 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/QZNWS2260255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a09e7a131ad4827d5d89ba63481d368db5a0a015c953ad06d0a355b08166469. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWS2260255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7845bf0ca4061e4c81584b8a373a41e37b798586b223895bef75a79ab53423. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZDA62376837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2345b5ce3d1a4d903a7fd355eac000c220af3c8a4f9942c7877b541f791fd072. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA62376835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7845bf0ca4061e4c81584b8a373a41e37b798586b223895bef75a79ab53423. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA62376837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c762a1bc924163b87b45ad165dca905c4d72b103983e977283a2d6694131aca. 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/QZK6P2325096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39884258419925cf78b24e3b28e7f0895c87cca4fa3c428b80227f8874553354. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFU2446691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a1bbae378f000dbe54caf5012eed590904fca76764643db839196d82d06ce. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZZ782419017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dcb318cbe2e5bb78b40dd26e2ca01f5ce2ae88196d1f48295c936cd0b35871. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ782437078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a1bbae378f000dbe54caf5012eed590904fca76764643db839196d82d06ce. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ782419017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dcb318cbe2e5bb78b40dd26e2ca01f5ce2ae88196d1f48295c936cd0b35871. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZZ782437078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878d71008a36d9b55f613c58a3561bab0dc8a51ccf4cafe502ca1b05bc77ccb. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZK6M2582421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463093f0a3060d4e62fe6ba46fc273e0c4713f5ced261ac5b6a7c90f950d7061. 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/ES71G2210700.