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 0x4fe4029eb761fb5789049efc1e763e729a51618e7f57526936250535ac3d40d4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85db7fd6-041d-4ea5-9590-9fcdd8874261.json and https://artists.proofprofile.net/proofs/artist/85db7fd6-041d-4ea5-9590-9fcdd8874261.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 0x6e1859cafaca857ede8fe27d76aaedc5557081feff4f8a0c4de862092822b0cd. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZNWR2492914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4974659bcaa41b6754fbf47345df1bd0439383b1ec7ff9c1a9b4bc003957c7bc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWR2492915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4b79ec6ea8abc233de42044e513481a74c4b9fbd125c0c9f84151f3a2ac3aa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWR2492916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba24de559c9874ad9cdb62ae1046ca048fd47e11fef3b7c59acbf8e69d6f511. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWR2492917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf002d376ed3d64d298d517bf4dc9d9ce110ce61dbe66842cd3115f0fe9464eb. 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/QZNWR2492918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73194f204f3aa4a1d14916c6aefa9d26bc26c1a0221674d8dc1219d8b5326dea. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNWR2492919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2263b3744794ec9c474c912148b92dfee24e9868685c90e412b222a10927151a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:24Z), 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/QZNWR2492920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a4ac69e67c21b9989f5772443106509b76b54de7aa391ace1b44c9f5f727ec. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:53Z), 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/QZNWR2492921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4605485bb234f972e7de4c0d697020d64ade60472bb6fdbd4cc74461f307c9. 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/QZNWR2492923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6535e53873db7620392abde0605b441cfff9f3f7fc682fc60fdf19cb176d58a5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNWR2492924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30fb683208f9887e932d015052d52a7a0385d08a068e6b85e79e7e9443c0dbe. 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/QZNWR2492925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d209a7fb12c26c10580c467b52af0adf0c825bac235b51035c4b1584fd06467. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWR2492926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd98d022a8e5f02abdb83445ddd52642a3c57d42383a2eb53d79741bb6c5f0. 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/QZNWR2492927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3404764548e462966b572106c6d6c162779a34daca55c973ee5caac31e29b038. 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/QZNWR2492928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a561714d4c447b4397f09f7e21b0556a96f4d1a4f85ceb0c5c118ce9eed7bcc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWR2492929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7bdfcd6fcde57f9c4e798453ac01ff0582080b2159dba6b85787d9ea58aa3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:55:16Z), 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/QZNWR2492930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f4cc083a33eae7bbba1ed589c789c9de2fbe74d329417402440d30aabd2b1c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZNWR2492931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a08f2ed4f820b06c7ce083507281ca71f0d1c78b503ac9880772a00b04b520. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZNWR2492932.