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 0x3d711d855f2fbb91586d9f93f4c113b7d05036d756310a34b7e5c6ccc2def770. 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/49ae4d29-7758-45ee-823d-d4760717388f.json and https://artists.proofprofile.net/proofs/artist/49ae4d29-7758-45ee-823d-d4760717388f.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 0x6fb07eb2df7f4ef7ae95379ac3688a1dd80852a2d988d5d32a4b8487f5268eda. 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/FR2X42104289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb266383ef44e860858c298a5dbf9f0ba932155127760f1636810a2e9dd14d68. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA072195103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabca71dce04123500bf180985ca59326b543ad0febe3890d2c80f6c6cf778fac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S2247392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69adcc9eb6f8eab9fbc90a3aa1dedbb6ad1fd6a04e152ff2ff0f6e1ddf227da2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732505177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ca5321e663e4c6360c3f93b7a991ea510ca9d060a1d18aa3101e863a1a04f6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HKG732492907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065af8d38a376b1ed2779e1d7fa65278e3a60a6d552ba3e443ca70b7994d36d4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/HKG732491848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc758f59a06e4767cd2d7f87d8499cfb3a124cb812583eca93a8784d6481751. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKG732491849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833775a9ee738eba9844438aa2f1e547b632abda57b7a6284ef216b375cbd38. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732482418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19401695d68ad9926f724e307452b20a3be7b455ea96d0082b0e71e910baff56. 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/HKG732482417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d342c5f51e2f27d728eda011b58d9cb8510e074f3b86ef696717524a289a55d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/HKG732468093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648c3c4fc41931c14377b80a567326b4a3e2614cf51b9f37eae6675cae1b9a54. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732481744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687eca67623525fa7da9de6db9003a6e81e726dca1429361a7f7fac711963474. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKG732481745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12170f93485e69fafa40ea13f874e45b46300711dac2865b14ecd5c9c4634b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732467440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021cac8ee5459dc26aeb8abafdf7a44f702eaefab488fd944b23aaebe7881929. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732465047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033bb03d8c132461a6b5ac47f33baed887dc7a79e6558895b6f98eaae9f596c. 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/FRX872148016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5ba65d68158869e701c9a7f6eb7ad917c068a5f9d8665ed547089cf9f47e61. 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/FRX282179514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3f0937bd8c450b1fdfe4b17c170bac23cbfc6ef8e9e1ba4102d9c32837dc43. 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/FR59R2143567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80641129d5c6476d15333e0bc69ffac4ff10c6a728ab8baa054ab9d1e704acc. 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/DGA072126606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42462ee85e0017117bc53d4e684e656d3f34e002ced1ee4f3202edd64d51665. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA052049643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f20f2e343ffd30c6b7f9cf0dc76ea985aa855d2b0c794c9389d9b96d6c41b3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DGA052005727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e5fc269980c954a6da4d860fbb5a425588e0a470b1fcba83ad83829db9ac32. 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/FR2X42078751.