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 0xa1bd0c5fd494689064fd3b46f51973957494efed9980ca71d27fbcfdb29239e6. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a4d07bb-a704-4d32-8627-c6c7cdb0a63d.json and https://artists.proofprofile.net/proofs/artist/3a4d07bb-a704-4d32-8627-c6c7cdb0a63d.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 0xf43310870db097352118b59ae6079b0209dea8d0cd5501277bbdb2754c1cd578. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QT3F82535967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf82e1ca1ffed83aebc8c8a80c27906780c048999581c8d539178d7aa32587e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:55:31Z), 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/QT3FD2562035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e1345025b30bd787cf5a5904727d3b71006575e4779b9beb0cfc3bdd18f471. 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/QT3FD2562036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730cf8b214cf18fc5da132e0ee0b3a7b488db3fced11e738baf53f5b22df9b3c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3FD2562037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29eda2d05cf8144fa8b79fe89638070dea5ab7a42e6fd1cadf3229424195fa6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:10Z), 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/QT3FD2562038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c155fbb98fe9130cdab03da1edc3031b3b6184dccc525d465a2acba7a58642e. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QT3FD2562039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b375dcd5cdc7788a7e10fc0fee433277b5d1dc369859926423ccc037ec84d3f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3FH2527523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14913f2acbdf7d8f2bffda67d3a35ca8675d64a67137193c4fc3c462eaa78666. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3FH2527524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f868fdf1e94dbc03747322018611055813b2c5d35bb3e406f17c8a9c6524a7. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QT3FH2527525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe6c880dd91e8bb260fcb8970ff1512857691aea8c2012f81bcef44a5b3bb23. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3FH2527526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52315abe5cb6f795ffe10da52f57452e6152b9e058f20c1b9852063022ff1b0b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3FH2527527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3253184fde36add5a05d09b62ce198943913073a21a466692df465d3c2b501. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3FH2527528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a9a124ab0f06e4babb6c256a6a3ab696da0e24dcdd65d09a2b1b529c9e593. 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/QT3FH2527529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab14be48e3eff40787de28eab05d77520ca3d283e439909939d551fe798d0b2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3FH2527530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717927a58b52db0ed158e16f7f978b1059d34e1c01e46df5697b839636566cc0. 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/QT3FH2527531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de9770a31a0f7cb96c5652f59a74055806edb88aa02e29fce9a6f9b883a3fa2. 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/QT3FH2527532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661aa45ddf4ecbe5fec76af5cc0147db58f5aa3e07e50e8abe2364063286601c. 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/QT6EB2537415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdcd89e77a59653a00b2bf05ce374407d81facb9f392ddec535f4be05540f7f. 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/QT6ET2557411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713e13b5ab50f17509f6f13ea9290d1a2b71c97701b81f856419512cad7f43d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT6ET2557413.