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 0x95aaf74657d2d207649059151ba18469e1df0a165cd8fbfb0b628cc00c7e6499. 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/7a15b24b-4182-4733-84b9-fb05a4d3c440.json and https://artists.proofprofile.net/proofs/artist/7a15b24b-4182-4733-84b9-fb05a4d3c440.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 0xf62c34bd1899c0acf3890ad97ec3c3b9847fa0b654b90fbc73c1bad7e7c9c286. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKJ8H2103990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1070819fc91d26e59cc7b8f99b3f50965472e6a55ed122e9fe0d3a7a80d5f8. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FRS182142800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f65432148e6080096585b1e9c8349814574008a37780ab1287ccb42e19fbf80. 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/INE182217621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82dc4991dffe48598ac7dd40d44da5794c4ed12195cacae3133075aa0ba2276. 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/FRX282294173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f108943dea41cda72a4b76432d78cda44c93a38ceca4f6c118d0433dc01628. 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/DGA092229553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2135e6c9f9f85663b67b4614a730d8c639f2a8bfaaf32b969ba1d6e6ada2759. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:15Z), 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/INC622217189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c485523974bdd48ec25f1b29d3cb63b8ff40e1c771a1eee5bcec3d22dc6df4. 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/INS182402809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a73543f84f8ccce297a7711470b25866854ab658a57e8d4de842ec2355df41. 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/USA2P2475820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03c90dd8cbde38bffccb775e0e2f915d803f9e7812d7a8582d8eaea8919ca3d. 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/FRX762519014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5138166071b914936de6756da096d029bd6341086ec5fad270c9cc6833e75f. 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/INI492100576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e087b7e520b1f65aba9ee8c4f4dec37143f2cce1830b90c5661f44aef39d9e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INS182401018.