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 0xff00a572ebcad23d3f5bb17984ebdb1767d81110ac9e252caa662aba982dfa33. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8eefbc4c-a588-4a87-b46c-858e989cc912.json and https://artists.proofprofile.net/proofs/artist/8eefbc4c-a588-4a87-b46c-858e989cc912.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 0x5dfa513530d281f36683461c4dbbe38bc820cbf37ef3333f825fe68fd5d721d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZS2U2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda72fb60892c2e4dc078fdc6a2356d3ca9219ab96dba2ab6e4f153606a4319a3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS2U2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526f0c256c54cac12f42c2c5ae66590f57e8f93ce4a12963e371d7ff242b1aa2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS2U2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1514db130237b62465039aed412a30cd1eda7bc927409e9143029a7cc7dc1dd3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS2U2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21c968e3c08083e5e46389c667167d3593bd93b2cded49cb4820624828073a9. 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/QZS2U2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce41367a751c26321d12a821235940412d81f9b3853b75ce8f562c24af1f3f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS2U2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b945149b13ea2d73a07ae569e4202dacd936dfcf9e6759374e6ec9ed1467a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS2U2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5abca1bbcb3026e67aa7155a8abe2e020dcd1ace3b2f70e9a7c8fb919f2d3ed. 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/QZS2U2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29c0fd7c0150a1d89554324b2a6e7fcf281d11a38fa8991529327de854c52cd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZS2U2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aed5d921a8899c4fdc9e7c7c29f433adb9fbe361409662b283018783a39286d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZS2U2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ca0862c153b377396bdd9d8a2da0d2f23f4b99635d7afe358c72234fd5c5b2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZS2U2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa513530d281f36683461c4dbbe38bc820cbf37ef3333f825fe68fd5d721d1. 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/QZS2U2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2541b699bb147bf59a23ba707bc1f86fa09b0e7824e64acec0ed2502ad102637. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS2U2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ca0862c153b377396bdd9d8a2da0d2f23f4b99635d7afe358c72234fd5c5b2. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZS2U2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda72fb60892c2e4dc078fdc6a2356d3ca9219ab96dba2ab6e4f153606a4319a3. 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/QZS2U2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce41367a751c26321d12a821235940412d81f9b3853b75ce8f562c24af1f3f5. 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/QZS2U2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b945149b13ea2d73a07ae569e4202dacd936dfcf9e6759374e6ec9ed1467a. 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/QZS2U2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21c968e3c08083e5e46389c667167d3593bd93b2cded49cb4820624828073a9. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZS2U2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2541b699bb147bf59a23ba707bc1f86fa09b0e7824e64acec0ed2502ad102637. 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/QZS2U2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2215b96fb5b207149de6f3a5bcf257d2b71c29d67319e9c0d4d4de4af80dccb. 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/QZS2U2300020.