thumb|Music box by Polyphon-Musikwerke in Leipzig, Germany thumb|A music box thumb|Interior of a large music box at the Museu de la Música de Barcelona in Catalonia A music box (American English) or
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 0xa22fd3ed12d2b4f8de598e4baf5c21da1cfc4779aebe52484be9b53d94610151. 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/83cbe4cb-4a07-4712-bdaa-790d4e7a03ed.json and https://artists.proofprofile.net/proofs/artist/83cbe4cb-4a07-4712-bdaa-790d4e7a03ed.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 0x28433d5c4e4c508ced8df373059880a5c9ffd48688cbbfc0d6107ecfc1841d6d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/MYRK10810034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b09d1bfbaca8fd67988ff702d0820719d7a871e22c253087bf95c14ce24489. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MYRK10810035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaa0e41d947829da664cfa62cbb8599c77ea41d3a1cbef5a4e6eafb55d6059d. 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/MYRK10810036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe393f34eeae9f209c6988c9ef2fa6810f7ba8eb9af7a45a33a64854aa72a048a. 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/MYRK10810038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631afe6f9df1433599f2366421e8a47160cd638df8e8b8fb295aefa757b6a302. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/MYRK10810039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba28286c6c15c14072f318a30f3cd4a9caab06b0530ec953c238744b021f4d5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/MYRK10810041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37245cc94ef4f0e2f381cff3852402cb0cf3924c739762c3912f0179170034f2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MYRK10810042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc41c30e7dcf31b113586d680b75fb04d8dcfa2c9c04c6a1ecdfd88fba5cae8. 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/MYRK10810043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424768cecce383d5dcce7fe06bf57d6f9e123834740c1d96b636600ffbe2962f. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:34:22Z), 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/MYRK10810044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c78770dd9ce437c894cc1d22ade0e6f6d7767f49b0950dce61cf7a19be9e52. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/MYRK10810047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149ca51755dd32ce27d2bd5ddf9d16911346b292182aecb5eadac8826e97b17d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/MYRK10810050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f031d8c18762eea02e5725420bc21bb4f7d87f721e1c697896a11875abe83. 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/MYRK10810051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9bd29c01060c62ad216ff5be8bbdf7efa78fc1055c0ee6d0411a04103fe993. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:55:44Z), 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/MYRK10810052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08e4032f7f00cb502aeb188eb49be35397e3ea3dac1b0315cca28af1f642fc1. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/MYRK10810053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c78770dd9ce437c894cc1d22ade0e6f6d7767f49b0950dce61cf7a19be9e52. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/MYRK10810047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaa0e41d947829da664cfa62cbb8599c77ea41d3a1cbef5a4e6eafb55d6059d. 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/MYRK10810036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050273ba26692fe96276b155aec640b90abc8b59a5f98289de3fca358e08adaa. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/MYRK10810037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb79d7386afdc40438d0c7ab631a0ae2a64d7f4abe41ff50a84ff14ebcb6176. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:35Z), 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/MYRK10810040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28433d5c4e4c508ced8df373059880a5c9ffd48688cbbfc0d6107ecfc1841d6d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/MYRK10810034.