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 0x80e5b1d45740c07bb8151ed27837525b7d5f8335270e7628124bd26eebfc98eb. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d38f17b3-691f-421b-9879-6481e1f81a6d.json and https://artists.proofprofile.net/proofs/artist/d38f17b3-691f-421b-9879-6481e1f81a6d.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 0x5523572d5662a78f4c99eff05b29aa45b26c012e127b79ce79beb5223c032212. 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/NL8RL2461793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6588fa9e6247242714ed5e940acf7bb7296d38a286127be5bf2767289ec3778. 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/NL8RL2461794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba52e5c3ce2bf770655227ccf413e119ed994dece5669f0a24d73d04353bff. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NL8RL2461795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4937f44056d40d18824cff698d886100ba89257dcdcbe169d670ae2d5e84b4ed. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/NL8RL2461797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59307ba7654efa379969b9876787d2e6b7ee4f2fc9e5ed071faa6c0bf1a10d6. 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/NL8RL2461798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f4f0d020b59d6a02a68514367829697d2fc3f37fbe41a9f74e2388143e1132. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:02:04Z), 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/NL8RL2461799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f6f5579ca0c25df213f34413c844942a5c3e1a22362d2417770b3ce9310054. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NL8RL2461800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd0d303d13ede845d58e910b7264e62f3f45a2fd409d1a61263f7843250c958. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NL8RL2461801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d15a80b33c478e1a5ef604c1cbd491b5f0accef6815d1fde2cb1e2ddade212. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:19:19Z), 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/NL8RL2461802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0cef591bc83411838546acffb137f665fa1d3b86200f60512db458534f387b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NL8RL2461810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbcac05c3533202c5c8f64f282d1e394c95d58d267f5b6dbaa36295854a0ccc. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NL8RL2461812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d95f48ea7d233630b98ed7b0d5ce6d06e503dc6b7fa98a5f8b0db513c3a9a. 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/NL8RL2461815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8587ba789a1254024f989af9a848a04b3c72b5c2f98a31289e0633b65e3218fe. 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/NL8RL2461816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40050bab4cf4b346b0acf3c84e22528f946bfa5de048cab99dec9645e58f5703. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:47Z), 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/NL8RL2461817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df2ab798a48b03ab661a2ab04d34d0d332f7a7de589cd0cf2c61f0ecee9e10. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NL8RL2461818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbcd184dc81bf9c80918a66a2fb5407105540a4642606a36d9d77d0c9e3e9d0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL8RL2461819.