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 0x69ff645bcc8a86bb53dbe0fdc3d78f9c8e5bc15ee735159f2c6a7d829ed2a2d8. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/030ce129-be63-4ef3-b30a-f2e4c20ba4d7.json and https://artists.proofprofile.net/proofs/artist/030ce129-be63-4ef3-b30a-f2e4c20ba4d7.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 0x51cdc2d45687ce2e7e79d6b57b2ebb4876a427abaa250d4606be0e21e4cd650d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:32Z), 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/ZZA0V2401590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286e4ace699f760a36574407ed45cfca9fe7bc298f50a180c379652477277f72. 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/QZWFT2497410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e533de215254c610778b3c1cf80bcbfaed0493ea760da54b3c62c5c03726dc6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2536103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fbd9180787d59b8b4f700bd504c8cb64a2812f783e2869ffb0d8dcaf4e9cd6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJZ2536104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2549d2cd6bf54a7caa8f7e811f51bc8ea0a46536adb31c8300a1f958834411. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJZ2536105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed19376349cba742c3a993758db4fd7f02e1e36b4736b386bdff3f16b17b7507. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:15Z), 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/QZNJZ2536106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d05f388ce3eeaaf25ecfa949773cb83bd5711b5febb8639fda039e2b5d68a7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJZ2536107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652a3ebadc40b012197d12e07a1f18bbc4d576b33acc95d5c8441440d0ee8324. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:40Z), 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/QZNJZ2536108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53adbf4211a7581d2b5a3047dc1f8e6bcf95d212ea3098d741b036467b08520. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:03:41Z), 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/QZNJZ2536109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611498649d20d17296320aaf6eed16251a122d39c1fb6be76877ef71e89cdaff. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:10:51Z), 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/QZNJZ2536110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94472861e2588bd49ccbef3d9117b872fecbe523773b46439bf8b8205036f323. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJZ2536111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb327c8e0487108ab70340d32caa48c053a4742fe845fe5eea59a0f0a1410512d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJZ2507910.