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 0x25f32674ca8aed334946defa9f8d6ec049dbcddb9e9b8199dd95ce7d7ed3e220. 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/fb8db8c2-441f-434b-b100-90d27ae2ce52.json and https://artists.proofprofile.net/proofs/artist/fb8db8c2-441f-434b-b100-90d27ae2ce52.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 0x1b365ff04a9d4490882c000860f73fee1cd4ab2e43877254c45ad8a65f72cc64. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6L2269142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a23693d065e2dbb2f4f5c7fe7791ad0ec05cfb3a85e84377678c52da1965c83. 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/QZK6L2269143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f565dd77ad4f00180c49b258030230584afb27e88bc552b52e6e17dabc50c7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:06Z), 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/QZK6L2269145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa07906462991a51b53f769ed8c03fb21e419e0f709c030d77b2787f461258da. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:20Z), 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/QZK6L2269146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415c4801ee5628cd02c4e0f45306b87c85769c63f86376f9347020c4372d9747. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZES92324048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6352f05d515b6238a2b7fae2de870decab53bca3cefc41f4ebdebb1645286a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:04Z), 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/QZES92324049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d9824ced5093988ad9b33d10db20b4a6ffb494091ba78078915ad2e5a1ccef. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES92324051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca98c62c453ea9c7c7d5b306f448eb9f604efc04fc9dda0faea20c66fdb3cbf9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB72462387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a1479993fb97fd12282d7a44223bb8f638c782277254977fdae09e9c878af7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NOFYD2308308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4c5f0195ebd30ef599ed5b78d158611bda54ee2fee838c0f95981b1438123. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOFYD2308309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dd098582a63a31deda2d79388a8afe0789c4580f78d16d6938ceebaff4a0c0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:07:58Z), 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/NOFYD2308310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3564f714c1050b2d8a02b789460706f4574a637ce5278a5cda29615991fab378. 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/NOFYD2308311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3d7e186ab33573264bcb0bfe0cfa3e63c1f53e0ad0f1f15371f2cf44691cab. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:17Z), 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/NOFYD2308313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c952eaf89a77454a42fb3468bf65d4616eecaf0ba66c8a206cca2284bec275. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NOFYD2308314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42216a796692037ae2eb47af781b21b85d112e5b333e352ff9afd0a717102190. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOFYD2308315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bf87631ee9c50440ebdc753e5c3596bab0882bdcfff56d296480a5a27c3f0b. 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/NOFYD2308316.