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 0x4c4eed90ba5824d1040cd90e2466c06b3701804439a98f778c5d8db5b97d4ca9. 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/b68d3929-5090-47b5-97ec-6f2ee87e7972.json and https://artists.proofprofile.net/proofs/artist/b68d3929-5090-47b5-97ec-6f2ee87e7972.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 0xcee67a461bec88753073b6309f23a4bfcda013e091ad8360604608a5aac5453d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAES2010725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819db6bb5e05fc78aab0774f528105db50e2ed3384e90881599ac36f641c2ea8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES52094252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc9ce66d99ac56f9343097db9836b30429b0ed6973e74755d91ac52a573a74b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:31Z), 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/QZMEM2233691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e2d3abf28fa317c2c244cfe23c2416f5ec565e0b7d4665768014ac4434cd12. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USGZ22169671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc8ac7c6286c9b89aaefc92bfed1e80c802828b6e0403b69dd94d52f91ea408. 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/USGZ22169677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc734cae325436bcc90c4ffd76fe596204e0191c6bffcf5329c3835e5915574fa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USGZ22169673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc8ac7c6286c9b89aaefc92bfed1e80c802828b6e0403b69dd94d52f91ea408. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USGZ22169677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47966c6dd2b87cb5edc82650345d2f2c82d6bad83897f349dc876ed4885864f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:11Z), 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/USGZ22169678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e0ae02a5019f7b6f64015d18e09bf1f671a8664d54d925dbb390b3178cab74. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USGZ22169684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e58c5c591a8bad303c466599cf3b139029e402b67308a9b32b5b11865e9c3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAFA2065429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd649bcb5b4f9c6507fc4cffec2683e8d170c9d80d72bb89ed39e4c8abbb590a0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN72268052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72dcd4ab83721ad215e84476f738fbb26ed130591a9f2d566bf592b7fde0946. 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/USGZ23274359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b9e90682be1ca7630e22ef90a08578366f79dc6a1fc9ce068a34089c057d28. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIH2414855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef739c4c8cc0bc9c46ba8e4d5e181ed6b7a5dd12443d091f86788c8274f6cdc. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:32:40Z), 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/QZQAY2436989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff13a7d421e2c614c74560077f98ac35cacdafc465b74d193ee9fe59087a1ab. 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/QZQAY2498816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2146cafb25216cdc23a2e413df9401aa7cfeac47674c2f7fdeb6645d9936a228. 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/QZSYP2430991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d0e08ef97e2d9a78621ec517e4c035b3d4be18600d53f883fa9cf02f13afe1. 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/QZQAY2475246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd769ad2ce400f8bb650bedadb9d6d315f65051bd1cc9012370e9396da5aa3dfc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZQAY2412678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ddc2e822820f0e98a7d6dffa8df6fd5152f1dc1467aab4e7fc5e050df3ce14. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:03Z), 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/QZQAY2445328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6281a0cb21e15f8340e9e9b2cd4cd9ab1e094f989cfa8a7d6d67bd6339cbf2c9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:37Z), 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/TCAIJ2496337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46e5d373122526654eec7767e1a6377aadca7b39e47702642dd1deacf8398f5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZQAY2465405.