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 0x1c4c50eff7fa8b13dfb8ba8decc19f139be5cb7115210c7ae20f41ef706c0aec. 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/1519896f-a74a-433d-a005-8081d5c496ee.json and https://artists.proofprofile.net/proofs/artist/1519896f-a74a-433d-a005-8081d5c496ee.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 0x78c52932b617d70fdb47c49fcf61607863efec3de4dc82eb19d0eb2e4f77e0b2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITDJ72100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74cb4637794caffe6a633dde58c1dd3c546b2612d706b9e3847d82453cba13e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ITDJ72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd699a0f2d25ab568900eef9c601c9a7832c252c59dee0559b15f87ad45cee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITDJ72200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e8ed95525c156a170fb411d40918f9dd8ea22b8b09a12770cca3d76d57e63d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ITDJ72200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb09a93710db39e1543bdd6963762c381f08533bf635a8ef600d5ebad09f022e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITDJ72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e5fdb2fb35e222a5db77808414a2dd3d2bac4d4bdd65376c77a7e03e8721b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ITDJ72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d096646d9d8d5533350e3690fbd4aace79cb13134b15608eaedb3c5816299a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:29Z), 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/USZXT2350948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609f981a42f1bdb3333587b1361a3f096615ca8ca0cd8d841b19babb730f236. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:43Z), 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/QZK6L2303240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d5fa6b281fbe8ba97b9e6675d647629024cda1d6028314ca757f8cada611f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:42:49Z), 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/ITUM72301465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6393c1d80742c823686ad69f204ec16b6e32fa46937843d18ea2fcffe9e28e52. 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/ITUM72400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c80e1d194a457143f2d48c7f6f793c18207fe2fb5d4b39c9e7823185ba8524. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:07:42Z), 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/QZNWU2485569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbde4cea36d1ee9320878df378d668644dcd4d003e575556510ae7a73fb8c3be. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAU2424224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5049509c6c24aa87faddd751a22efc396175cd7fbed2d96ca4d9e2ff4ac3f7f9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZWFS2447713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd081ac2e73f3edee4c7e706ace0adf979a324bdb2219b0a28fd7da35eed5fc. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:12:22Z), 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/QZWFT2467543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abdf205500005769c0042c557d8875e0767caba26024f9b17fb8ddb4b407f50. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZZ7L2493222.