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 0xe9b0f9a3728677642be6ffe4a22214140238537f9977a857c46d525c27c2e766. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e296bd3-42c0-48b6-a3b7-7421a14f6af8.json and https://artists.proofprofile.net/proofs/artist/5e296bd3-42c0-48b6-a3b7-7421a14f6af8.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 0xe445837cc003ec2073d3280328af8261755b4589d8cf3fbc41c8ccc9e2ec9841. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZPEW2595572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf76eb10ca35a524f35c82703dada2aa1c471db8f60716011fc9b40b5afb2283. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QT2VB2505737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad539c0f018259d2f3d1710fe54fd6363bd9d32f3a1b7926f9558982f0c8c28. 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/QZVEM2537510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbfd5ec8a63aa485f36bf2578df1d90f67b9ad9054a452c31e9780bbca3e017. 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/QZVEM2559063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4588c283bca976776fa9368c6078fab00f57668fe4310c280902d04ed16a6c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZVEM2567539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d03482279315e05c15c9e372a785a9bf1e5832a3d4bc49c7d6b94f693e05752. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:35Z), 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/QT4K32501653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5ce65700878102c6488e33a2b5587d2ec048e958eaed4abaf40f862dac1c69. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:49:31Z), 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/QT4K32501659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a87b1bbb0719e29bbd44bcaac15e7b469d4c5954dd7455a12e31d65c159aa6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:13Z), 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/QT4K32551010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203667cc02a6b0e0cdd8948b4ec422e2496ed6d5facc00242165eb7a4775c339. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBF2325120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb62736ebdc952664d8d26b6c04ee96a98f21024072afb82b805dcf27cfa4741. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBF2325122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe316ce7d1a5517a6d00f7a2e80a0f2cf00cdd8f3ef306f5bf5e2a2ba1a6846a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBF2325123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102be0405897586abf592c3397afec4998045a517177e66fad454e026304287. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTBF2325126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e5a0b06c9d0c7969d729e3fa99a0e125d50f1041c80b0321d6098c16d7b197. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBF2325128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebe56c1c185357d4821af46d8faf7c0f9bddab3084f1b4d9100fc9c66e1a27c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTBF2325129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283e9b3997280ee46e41bcbf57d6ebb1cab5d8d152d74cf170578c6a7555ca84. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2376224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb925b286b0ca6f0ebc00ae504530c20a8420663b3189cf37aecc6057b1fd4f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZTBF2325121.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325834b00e286883a8c80a6d7bd06d4b233a855cae24921d344d26d6699a809. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZTBF2325124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236f3acfd89dccd5fcea44ed16d67b903a55c8b12997955a88085d5663f6f4d1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTBF2325125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c41e55104d0e637370c00807da46f1d2ce9f17807198105d73b08b2b0831f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTBF2325127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7192229cd1f6624232f28cee80970b6dec1b6714f35fb50011ec7d3d054f817b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN42486032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377f065e71c799bc8991fe867fc3303e898ddb22ec56ca06647273459474db53. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZWFF2315828.