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 0x5a993dab1fdcc5ad72fcecdae1c8959c557abc6daf7b381c58ea18cdee784d4b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd835f58-56b7-4ffa-9543-6d17af5f6172.json and https://artists.proofprofile.net/proofs/artist/cd835f58-56b7-4ffa-9543-6d17af5f6172.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 0x2c7965df50de8b76803436e68f3c47a0393cb1b864dbb4b9a2f386186780864b. 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/QZWFK2375210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc8d75727b9d7c99f49c0de75abf6f9c396be08ce4bb74b5f21097748a883b1. 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/QZK6H2388774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe998f73af12cda040cdaf3bb3f8e1156fb41f59fbfeabf22aa4fee8fbe8882e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMHM2464912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9d3ae3cf23522aa39c0584f8bdb6cab331747616ba9aaccb322e50e4fc311f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZMHN2461082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d99cc86213fbd31f751f9d1be481f1caa29e94254742ca9c093aac1ef2c618. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTBA2484148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364b61ce1feddc149712bcd602403e4597a377c87641bdb222fe0b93e4924f65. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTBA2484150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70adde2b5bc82b7feff67fc56fe06e81025d24ac36faa0d1935d7aac969b4c1. 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/QZTBA2484151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabe78b03b57777ad7ffc03affbd6ba6b31c75cea38dcc344c771a25a618956a. 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/ITOGB2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e33f53c9a19000f4d68fedf491d94fc057c81425f56f6d376d495cae90ea75. 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/ITOGB2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a09ae104965316fa89886fa6e276b5361fb09ea72cd49469257e05db93fb03. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITOGB2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6060cd28008ea6cd73de5b794c38fc928ecfe9daf402f7587e93c5b1080b3. 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/ITOGB2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc0b2ce1e90a535611aa8a2476ac3fcbef84e7f74a15c961c8954a4bb3dc59. 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/ITOGB2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0a17b1b5fd0e4ad874d9d1a166597dd0983e9e19bc8e60f13d217b1fd6a0ca. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITOGB2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15493eda983fdb7c35063e28ae9fdcc8f990fcb5b5f196effd60bb437aeb97dd. 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/ITOGB2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5311deae38094679449950d26a5b71bf7b4055e3bc81c68e26d360155309b21e. 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/ITOGB2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6e9bb728be237b49e99b907eab14d6a3de2d0ac5b2fa26b4e6a279140124c. 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/ITOGB2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df793468441ac9ba6865106ac71c188ec62339c99c62ed37817f04c7e20ecb1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITOGB2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4fe21c35530bd4c67ca5c1a5c779bfd2a129c54616b5fb9e8236bd74bf4b96. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITOGB2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39b69a8b4682e8057aa84d1296b19b54f2cc874ac0bbea2d2fcdc6ddce16d3a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITOGB2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ebdef5282fba9626b3269e4db05db457b594c0b23725d5d173cb1c61003607. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITOGB2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6181f7776f8d287737fb7978525233994dc5e94e340b8025a30cb98e24c9f68. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ITOGB2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776096ee90caf98a849dbd40e2d1c290d97c28f063685118ab7d7aa91cd59e91. 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/ITOGB2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0e9bce9e527dfd84747a5dc4a017f346b290f515b47ca67adf5fb3493dc35f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZTB32321849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f49d91c40328f2c4930020f7710361a8292c5057a0032e1f65edf685e6ec44. 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/QZS662291638.