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 0xe651209be5c7c3ce622a9c687fcfba5247eef4c76635110139f439b013b9200d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eac73ff9-6d8f-408b-b48b-24c983c46b66.json and https://artists.proofprofile.net/proofs/artist/eac73ff9-6d8f-408b-b48b-24c983c46b66.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 0xd31ba9ea711f762d0d93e8fbd854013948a0452f10906cf6369d8bcb8168f5da. 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/QZTAT2496585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393e431086604ac9cb7356f4c8531a7206e142da14adcfee885c45a35a98ef1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6F2516049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520c167acbe37356e92063ad157e175d1d24be9e303cd71d4c1a41bfeb88667d. 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/QZK6F2595523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47391c23bf5326a1c2438d321dcafd8ffbcdd6a66d7aea9003d65e6019ebd9f3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAS2523157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a8886f49dc935b16bc90704e99daa0d8ce12a56f6817499a514408606d5336. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAX2599740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612e15e575a5d4d812e39be633fb680c32befd9b8a700654962c9cb4697797c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:52:29Z), 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/QZWFH2525599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8340c1454a3233286b7127fda891389150bdfd8a5de8de42593968a416f571. 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/QZWFR2508983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc73b13b82736175931814598b5aeebc55455435a61253dfdbcf53279e3995e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:59Z), 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/QZWFV2522734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58117c4be1c1d6d03874199b8deffe7ab1e06a755c19510652ead31def6fe77. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFV2520929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5b1f7e3a828e52b72aa19dc4d69997c8e4e3f24723528f58338a8c4750fcfa. 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/QZZ7N2547394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020e75c2669495b535c0fabaa7eeb2b74c205f4edbfd95940b7f0f62f0ed3fdc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:37:04Z), 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/QZZ7W2593178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec75a23a5adf468266b916b27a6edd72f9913d8374154a15e39f750b611f0e4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:40Z), 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/QT3EX2538878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3446a78f5a6ac1f289eda12a62abd774f449ca73f69be2b207cd9381bb922. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3EZ2561620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97c5dcb2f4caf614f5c2054a60dc9842e27f8279001d39e6f5b5712bb312879. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3F72590277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a43bd2249465adb2f3f2464340b3e26fb92be888bb457f04717c403412f3e04. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QT3FB2584693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3c05931161c6c7d516d3821e550533dfd0fcdc5c59efbbdaeeecc66ca9d2ac. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:49:22Z), 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/QT3FE2575767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d498cfe3a42420624d9a1875f9b12a1460d2f17b7cc630fe8ebe3e5035e51e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:49:21Z), 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/QT3FH2552964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa455c9176b2c4695bc2d670286d91c3f0d09e2ff33055dd414245cac1065450. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:26:12Z), 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/QT6E72504562.