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 0x52d3b4676ab0f347ba5d578115befc84d31c015dd84b4ea12d9c5d3020b21773. 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/1f8eb31c-5b9a-4421-997d-0f4fd5cf7fb6.json and https://artists.proofprofile.net/proofs/artist/1f8eb31c-5b9a-4421-997d-0f4fd5cf7fb6.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 0x47d3e87b572e9539a18c7364d8c3a8a3c973432606757c46786cae749ef0de56. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:20Z), 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/USL4Q0820171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb380120fcf23ff12826516a0d6f7e0839007d452c8a4d58e80d5408b8374c69d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USL4Q0820172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc157bde4a17f26449a1aef5b4f8674bd866625b3dd9fb7f912c93838fb237f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USL4Q0820176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc35310983156312809ed5aec2af610f87e3693d420771114732dc0cf1c8240. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USL4Q0820177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a400bbc83df292e6ddde1559cb33b6f094265f862844ee66166580e6a3c6e1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4Q0820178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359e630041274ff9008ea2dd4b2ce6fd2cd40676f7f957e6d974addefd4188e9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:57:07Z), 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/USX9P0971274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9299407f2db2c49044a95b05fc1036d1e84feea1682e1aaf2aac34068c82654. 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/USX9P0971275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a987daee4c24e793eec7dc98900e68f4144b12759cbae1705c57e12ef56e3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USX9P0971276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be966d97756fdc4c59846f81e43aa55c2198da23483b16a3d7d290df69e519a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:18Z), 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/USX9P0971278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe395caeea484396b9d9ff7fc9aaac6f784b9092ccad8fac2056e62927f40ea7f. 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/USX9P0971282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72028752ffde533b980c62420047374cfcdf9eac76450236ca5976685fb713. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM21278966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0fd7b2bcb75079788ebba0d3c7cf3352e0996a8e04970f27905220861f5055. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USHM21278968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab84ffe974754b94ea8dbd64d32b9f175685092d320611d8a96944d1bb6502. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM21278970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc4028593b185b52ecf6bc5fa864a9ea7897d17471ae702756130640c863362. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM21278977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97ad10c68e85ebf970367f0ffe17efba7069512d05c5e666e5c3843067c5a4a. 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/USCGH1519136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936a715fc05c406c23d5a5996c3fb0af95e2b1872cdcce94c99da9b9ffd4a62. 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/USCGH1519137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9d33bf2dacae98aedf0ceb8c5791b69184e78e2861d78be39453910e5d949a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH1519139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d223858f6a721f605452870120380ba6c577f3b8101f25e6020ed9af91be21. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH1519140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443d1f4c7a9ff778f949ead26c29e18971c506a7da60b3505506a744235189ba. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH1519142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5d7f60e4046dd9bf9394ef7d91db445674deb92049199cf6ec9e744bc32fe2. 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/USCGH1519143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8e8232b0e9ac7630cf30302d5e8cc96b14e43994f43a0cfce0df515c977756. 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/USCGH1519145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea70da99c148c54a78e522cd5a10684ffd786e1171a07a83c6ea09d0db19009b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USCGH1519146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3aa264eb21954f64ef3477a1242105c0445ec35c1b40aedc14b60391148f5f. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM82098076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3be9fecd0b0a34c1fb54baa6772c858bc948f78adda7d4e3244215c1af44d0. 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/USHM82098079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabf8c9abb41c05fb4b81e93e4fde86ed3fcd5015e07a2d9128614d618ce5e77. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:33Z), 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/USHM82098080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c9f0492ee191643d09101e65cec5c5701fe926a84e0d51a4930280680a1fb0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM82098085.