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 0x3e02a3f159fef9fa6274cba38874c105b023488149a2e3a1f38398790f61c650. 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/3595e398-f71e-44b4-ac81-1b8ec2335a83.json and https://artists.proofprofile.net/proofs/artist/3595e398-f71e-44b4-ac81-1b8ec2335a83.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 0x3800d886393631a28bc4b78f34a6d778bf2d046b593b58c61dd8d0374f6fc293. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE5Q51820154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a7ea8898f3911fd0f5099ed63e5cf94957431abad0cb47cf050fbb8ab9b9cc. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE5Q51802954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9bc8b2b3d98bd830ce9358f56f15ac51aaaad79718a1c1be2a881790ad0773. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE5Q51807800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c3641500566673f1327bdfbaeaca57a2b86e90822c606fe81441e8cf5d740. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/SE5Q51817839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3de0674f7057871716980c3c5c333dffa3b0beaa0e31818ae4f0ebcc6d9a90. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/SE5Q51819666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba3392280e379076aa6e187078a58dd23de522f22c9652bb83933693e8962a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE5Q51820559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6827c16d28df2899546abe6e34d25973130472ba268aa3a621e8c8a3118e8c73. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SE5Q51807455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b605956c1ab78a91ae39ea7a34d7ceab78e36eae84bea5340532f0ea6e919. 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/SE5Q51825854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382e6f812e5eefa1460d7dea3c454404f01759fa4dbee5e338d1dbc736d6abc4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE5Q51825822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6541015eb74f19f07b618368caa20dcce2445391c78cb2bc936448b547094029. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5Q51805838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6552dda53cae5c2fae61c9866ed937ca30988c0d975cf5a7f21e17baae9a085. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE5Q51826243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aee39ebe3173be119afc333977af7fa497e30b9471104c2ae7fdfe72581f76. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q51808962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c079ed8fbda371c649293a43dacee84e891f3e1b72eb3c73d5f12866b20c63. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE5Q51812872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b5646c5cf7aee05deffa4be2e7442c610357838e5b272bca2ae05f3f1510cf. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SE5Q51809232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559bdb63d73dae65dd5966aa3ec900b8da5bef3dec23b508e47e9d5939bef4d. 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/SE5Q51809116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c10a2d00ff273d937320f63508d6c41ee70c75d8dfc00b6bcb136a7faccd046. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q51822929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cc5e2ee62ab55debea676518d8701ec1f222325f16f82fab715cb231cc789b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5Q51820944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ba9d73bebf1d0e411fe234bd3f18b21d8b49aec2de101450b2f896782ff71. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE5Q51815802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c2675d879b194e68d81205f7e42f2b3203b7596a67144279769b3b0abd2057. 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/SE5Q51802293.