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 0xc7d8b63091ba56f5e101fdd1fc070329e2c9e9161182a84ec51d31e94269a8ca. 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/4ce3ba10-ba01-4412-89a8-744fe8be1835.json and https://artists.proofprofile.net/proofs/artist/4ce3ba10-ba01-4412-89a8-744fe8be1835.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 0x81d44c696d5cc00938b2f35314040951fbf1fb54e39bb141e799c07a74054ebb. 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/QZES52469077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6c86954509e5f45494a86943ca67d61bfc360afbb52df54d1493fd6b6e9b58. 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/QZES52469078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526b8327076b01efbb8f3a36c24ab79be273a33ea5ea261891d821534e1194cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN92421104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf16580bc248a8a54c01ec94b31ec2dc24b4a6c6291cacc02dd326c810b7f6a5. 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/QZK6K2459122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e6f77005722611c3a979c7492d203caa36f2b6140271483ad6c8bd5b80dcd9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6K2459123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd55ce6569724c85d678005df15a123457571f6246efe6ebe6156c56a4ed54b. 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/QZNWT2496551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12db7112c29398c025d29fd6a156810d5ebec91f485747c6643a291937e581be. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWT2496553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff0cfce5b59f9fb7c2e171e3d0eba6276fc74204b68ccdfff5c08d2b23dbdf3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWT2496555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672df2d2e60448ecc9313101545a1c4650debfe47081bad868650d9c6c7068c0. 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/QZNWT2496556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1535bc9de204f4f46558ef9ec250e97a5ad8da19f7b8b13df18c8dd0ed39145c. 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/QZTBA2421796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163800cc1fb3fa1e5809545f08cfa4395f6e7272afa96d4bba2c4d37a966b1b5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFK2466376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b900a1ef478b2126dfcddbb3dc0e40231e3a77a351d596dcb9e18bfb8455f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:20Z), 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/QZWFW2450894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958e20fee251dfed51c96c647f91a37d2e20e964689a156c7ce5c2f1ac8c2d20. 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/QZZ4J2400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620183acce3dedc7b6554b8a6e7c40d9b88d0464e1030e2c91b99389079016b2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZ4J2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5886058eabd7b9a246863bfeccb2116d924fc4b9ae3d9c703f31ea4430d1b3a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ4J2500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee61a97796c51829f141d38a340c9bad551c963a360633dabc7ac72f78c9ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ4J2500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb405f9293302ae63d4dd86e6de366309483cb87a0fbb3566dbe3726e952b6f0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:20Z), 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/QZZ4J2500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3944ab46742995801c52864aacba9326eac77ebeef84d8d3ecfed950df8e7e1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZZ4J2500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379e3c6ad121e750d854518ba7b2c12cedb81c9d2f9168b59d0e8a8fe1195fe. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZZ4J2500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b751094e77383437a5e2eed4df2bebc0e1930fed1a9860fb2ed160f6402fbf. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZZ4J2500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e43746133e4da01667fdfa07b504444087592d66a314951536cf98b6d9f5454. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZZ4J2500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc63866156eecec62ca005856ecd54fe07696ee7dd09f414551ec13847f7ce52. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:13Z), 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/QZZ4J2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac2791932951bd2b9e59c171c267dc5462915d028a2fcbfb2e8990df720f670. 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/QZZ4J2500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02f77c537a9c606795ae046fb6ea153e2a0c8c588fffab874d192a5097ff400. 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/QZZ4J2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d74a37eb4777bed263bd3f8b928ad45089d7d4b00d8e23cfdee259ac45d082. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6H2486279.