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 0x80e29215b6c1b2b4ff52adfaeb7c5fbe9f19170a22f9e91b42cf95477ad4c46a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29d37ece-9023-4d89-b0eb-c51f34517195.json and https://artists.proofprofile.net/proofs/artist/29d37ece-9023-4d89-b0eb-c51f34517195.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 0xe46bb69bbe4a74746a531b45688e3406b5f85785564c7f31bda04680714a507d. 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/QZZ7R2423757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40179be15957ff47f50f45ffdabcf856f969e774978250da56b9ca9de29c6643. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZZ7X2412163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767787e7464587e419b7805f60bed03a7b12dddd88705db619b2bb80fd030a56. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7X2412164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89de0e1ef35df7cdd387c94b715ec19d5c6cb24d17dd1ac6dc6141ad0b712a57. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7X2412165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6a0d0b779c6911eef1ec3d76e10975bde98fe21cac8971f28fa5780329efa1. 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/QZZ7X2412166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf326b47d2de73f4e6af8c488f0199fb696fc9d13ce3fd2741fac2e87b7dabd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7X2412168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85701f4df6b4e76ee34e0c5984699719cfe98353348d21fe73d6310596b39915. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7X2412169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5c2706a81a1e626ecc6bb37dd6139750c2bd0171ce59ec9c51a44e1557e1f5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7X2412170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dc08266dc10a04940523fbb9f39811887ae05078c3375c12ab66ff3bc85348. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7X2412171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc58710be23b67726b895ac38f6b26f1916d2b1377bc53881145051422bc72f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZZ7X2412176.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72fee791a1e53531b15f7a5447154fb00c117cba7636628803f745c55c5321b. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:35Z), 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/QZZ7P2523635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c6c9f12b6f4d2c70495ef2dd47466004c831b7caf213f4c24a1834e4d8027f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:28:44Z), 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/QZZ7U2528096.
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