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 0xa0a6274a631480daca080ec9c5c059799b5b3d4aa8fce7a2e7c53bd3b3ef2c1a. 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/e2e43316-310e-4284-a074-71359f4010f9.json and https://artists.proofprofile.net/proofs/artist/e2e43316-310e-4284-a074-71359f4010f9.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 0x4adbb15ed7cb21c3143e81240aa16b92e6bad41be092b072c7a0e95f47a4cae0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US7VG1336088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a53cf99b1604c81e0f08585691b393d7526134d349ad9aa44ec775bf2820edf. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BRWNK0600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d239b8b07153fe15f1efc6f1e69dd3f95a96aad2318bb2d9559b50d8669ac78. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRWNK0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf463f9d51381c10c9b4c14cec456c277387e8d55a36acfe953ca32694b9a2965. 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/BRWNK0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a9adc1cc41aa8f94ecdaf9d33b70b9ed2db9c82cc5c71b1b6abae7245dc9ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BRWNK0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2bb8c182b6ab5cebf6ca92d3838710092b0933806b3bbcdba0c20ef3a0fb76. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/BRWNK0600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cb14adbd9da38aecd1b6f4fd468c2bf30b67065a0797ec62589c948f1a4ada. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/BRWNK0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7da2b54accbcff1711a18c9c39be9070cf88c1b015da9c56e6927800c174e00. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRWNK0600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d2998c12bf5933b82b77dbd54f15d3d51a0abcb7f353ce8b2f007647c07a53. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRWNK0600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568db02972d0c9721e7ce46f06522a6ae9c7bda3c6fc5bf72e7d5d83bc9d3ec1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRWNK0600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb444ad4724360d60a99c43565d6679f66ea7b7874c256b835a784c82022ed185. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/BRWNK0600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5fad52a5adf4f99f5c915a191c21bd8c75af7e5638c66fa91437182b6b3f08. 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/BRWNK0800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc33da50c7a702cb496026942d848e83e01549c705a3d95ac627710437cbccb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRWNK0800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f14986b3656b7b030527b55c5db963160a5be8a3dfb2fe96dc03d56b190910a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/BRWNK0800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cfeead3959b7466de64050b7d99f5b75c1a1b61559bc1a54e4907b4898bc7e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRWNK0800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c813a53ee37a1c96ac8eb6b8d41b9c8ba4a89ddbd5be7b39487f21b5a6845b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BRWNK0800032.