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 0xb54a0ecbfd3644e902c2907673dfb80a4a2638e5d54b45a8a517458bf124ad34. 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/884ed162-a052-4d20-9a95-dc641b627543.json and https://artists.proofprofile.net/proofs/artist/884ed162-a052-4d20-9a95-dc641b627543.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 0x1308abe0ee6330e180a1b2d57f1e05e8480acea9f89829a40ed6b27d8e4c27a4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ72083658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159c0e64359f70f4b2880107efd0e48f17d7d44c1b63805c164d7544847d73cd. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6J2029778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8cb3858fcef8d69b5058b80408aa6e15d5b27c28f4d2bac6e1be2835bc95b2. 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/QZFZ52103002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2270f5d42b2569de3711b9e5554907750e677557ed88c5818728d046257b2991. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6H2284017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca9afa4937286e0108fcd133c1267af40e8a50df64eac4f12415c92ed4060a8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYZ2393136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473f2c0ff15934ebc44d583c979c8b6bd704eb4ef7370d8f57b17b3a81b527c4. 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/QZDA82308873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b578115d12c9e408c9dd66970d29cb4f17e9f18a4ad801626603abdc1e78071. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZFZ72437008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b8b8e22416f277d4c6a181fc084a0da10a21883e83d8052da4faa5cb123fca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN42490831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1826865ae788b2ae5e0e1eb9786e7d627567641a0898b966684eb2dffc59a262. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWX2451493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe844b14eea1c5bc8196021919624c0fb163fa6ed33e793d5f536625e7a1cc0dd. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:13:40Z), 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/QZWFH2461603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2794063ba37a316e1bbcde9cd03e709901d4278389f786fb0118ab9d04ba39c5. 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/QZWFH2461601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9c1bf9816f54c81321f9fda83c6e81ecda31e6320f7d3da0fb8eb6e115fe6. 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/DEUM72413667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891a3af42afc05165d577325e90705073cfb856eecdf8b92ab8a5337a29d6140. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEUV72500338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8f5736968f14ab8b37dfc1573657f08eddacf4d5803703b4302c653416237. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/DEUV72500556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401c3773666627f8b2b015ea5cbb5da0f280152cd262dbe019820b0e80afe39f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA72513344.