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 0x0cee1325dec0d454d005debdd72ea6b1724aad91221b29c71f4b24d24250f5ed. 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/1d3d1cf7-fc22-4eca-92be-2394c20ae187.json and https://artists.proofprofile.net/proofs/artist/1d3d1cf7-fc22-4eca-92be-2394c20ae187.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 0x5ffa767296fe003186c2df899def2b6aff958a4df7abcc6d258528b0b12f2850. 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/QZLRD2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d7b3771ae81f646a8599b278dc71fc3fb52ea55ad615c9d82f922b9ff8f401. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZLRD2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9470129566e1a07507c666da81ab899df173c680cf828d6c07f90a564fe134. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZLRD2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b4c67357046bd8eba3559c3154cbaded83523d82e0c4320c79a4299465ab0. 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/QZLRD2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7425cdc5e9029323a7938e545b132964c98d316cb783b00dd9f438e31f3e272f. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZLRD2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f09a0cde33e5ff1c078e698035459be83224d34947c3c5c6920015282a678d2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZLRD2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52dcf0524d632f67f93d3c2c0e0efe2e8285a429f96e7f4ce14fe3de755800e. 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/QZLRD2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d20c15801c30262b3a3542a0768db5bee21440d95d660daec3ef98945bd5c. 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/QZLRD2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dbc4400a7fa0b5d068f065dbcf969313fb3c125979aa3fa2bc29db2bd2d42c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZLRD2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cca9c0e4116feb50557cd194a228354d184f33f4b7889d6d787030d5432835. 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/QZLRD2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523c04b8814338330bf79137fe5601865e477d843f5313cb8bf8fa9c82fe82b6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZLRD2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52dcf0524d632f67f93d3c2c0e0efe2e8285a429f96e7f4ce14fe3de755800e. 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/QZLRD2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c34b00c9d54c873f2af3bb9686491c2e44edbbd635fca83b2df2ff806348d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZLRD2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d81a8c1f007fce1e096b7a6b85fd492d1f166a67712ee5b82da4bed221f445. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZLRD2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a922de34aae4537c4caf93c91961860a5413b48bd5ca48d306b2c4ef6563b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZLRD2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d7e3df9992df1cc4cdbade7a74953da9ee3fc07a38b61d18230cd8fb580b1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZLRD2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae4697d65db84ddc2859eba9c90fc45e1c3420cae8ac3713187cf99ef9a07b0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZLRD2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ca7e8f37d7a1faead210ae84e3dcc2f774ec8bd3c6561e2c0174157486a22a. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZLRD2000042.