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 0xf9516f19568508daad81f4b30dba34a0fbbfd4095fbebfd0db4735196567ff42. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9122d9d1-8fcd-4f41-9956-d75a45577106.json and https://artists.proofprofile.net/proofs/artist/9122d9d1-8fcd-4f41-9956-d75a45577106.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 0x4288c390fb67a28c6c8c67a123b64094b11a6afe27dec44c6964bc9445922a62. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLB171301647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed1136aaf14fbaac511975d5be61f7380dd991c4d2709301ca7f17457559a70. 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/PLB171301648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd743121d3bbe735f357d534bd0f6d059897996b4518d332398b8a624c5aa46e1. 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/PLB171301651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe240524029e21cfbb1301087f2d955335867cb66b1faef29e8acae9db925a55d. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/PLB171301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7138c5e9b1e00a3683d85502f19a1b14a80834e45dd3d62e8ffe696db2c564e4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:32:18Z), 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/PLB171301655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d968a26e9dd9ed82169c91973fbfd9686eed853f3f4f9b0b459db9575675b6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLB171301656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb3e42a3865c438fbf86d024d51692bfe5f2b3a30df4a879d9c90cfdfc34bb3. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLB170702078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8039b56ab501d5015f9567e8abc1dba9e1c23ce0a9d52a95d5027247eebe3a0e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:51:35Z), 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/PLB170702080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63169174cca05be918aa4a2dbf6d7b0034d441319c6e591b294fe886fdd3dc7. 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/PLB171201271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec50501e42c75d91b373d245c4b0a70af58f49a38e96c5d791209933e98ff9fb. 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/PLB171201265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae5f2f6a728c3fa239b1d1abc0112d60364b752cab46c31f2a88404102b150e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:13Z), 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/PLB170800358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88183175fda50bb3cb4f0e667e3ad47f9b3f5e67f9da1ebbe1aefb226a29a5d. 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/PLB171800223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77de47441972d5661c692fde42fffefb562d4400521e326c0bf333a4049e83d6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLB172200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbb3809e90c50a02978f58da80a4fae187153fe6209792c58fd15deca1c790e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLB172200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe231dd5d1a431a20eea45397da0e805fc50e40f3b9933bd93633668ff36f92f4. 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/PLG961810004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967f6fc1040c07661c5da35f875cae05a37b4be760a94cc75caddc1c83a0d661. 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/PLB170702079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df6fca7dc5d6c108701e06be45bd80f688f88705f9257bca27754715ec52ec. 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/PLB171201266.
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