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 0x4ddb33bd1b51204a61636d56065bc73c7e75ee996d5c74f43af88e5c5f416912. 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/33062654-a324-4164-b458-ec125126d694.json and https://artists.proofprofile.net/proofs/artist/33062654-a324-4164-b458-ec125126d694.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 0xd6e7c32ef5069c2f56b257767e02a83d231ccc41fc44e1c29991cdc07ab6d0de. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM4TW2020558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd969ebfd10ff7c9e38f630d7fcde944071d43df48513436d2a316feb0d9a86e. 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/ES5682000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae41fb35944df1d09d78d9b77a37fe2893400890309785dbdd495c1d9ef940. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES5682000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aad063df5670e78df172835be9766e34d98c0ea5a063fbbfec04efc24106c0b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:07Z), 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/QZHZ52084109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f3b0f520057cfb46e2d2042512d6e2bfd52dcccd815ad9972d0066d191b8e4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZGLS2408757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3ee663675556c70da8e08e2eb24f5e3041538a42c2a7c9c101c6eafedd857f. 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/QZNJW2461441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061008cc889b3f2e94ad37c319530976f50e963bf4ef2687c8612e36b6403ebe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/US7VG2590610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e69fb802ac744bf1de7d652ae23f581dd2fdf13fa11bf3ed5f32033d5193c11. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMZ92527854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c10b6c58a8faffad855ccaddce7433a98972b4a5610f97280e245fefef3edc. 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/QZNJV2548746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f3b0f520057cfb46e2d2042512d6e2bfd52dcccd815ad9972d0066d191b8e4. 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/QZGLS2408757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3ee663675556c70da8e08e2eb24f5e3041538a42c2a7c9c101c6eafedd857f. 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/QZNJW2461441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa545b5fa67ef61713c63e3cbc15e76ea763038a95bb7f3be83d7b25bbe46668c. 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/QZTPX2454220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e7c32ef5069c2f56b257767e02a83d231ccc41fc44e1c29991cdc07ab6d0de. 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/QM4TW2020558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d075532cc4e2a20569658d0c58d4275e85e6a975d3fe1cc5fa2f6c408bd8197. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/ES5682000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd969ebfd10ff7c9e38f630d7fcde944071d43df48513436d2a316feb0d9a86e. 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/ES5682000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae41fb35944df1d09d78d9b77a37fe2893400890309785dbdd495c1d9ef940. 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/ES5682000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7205e36031b6fabdcac242f57ce0b03883f8415b67d0f760ec0a12598d8536. 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/ES5682000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16589d1a5d2dfd52ac5a102092db66b91fc584d582bd45596cbe9ce8ac2c28c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES31E2508158.