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 0x85164fc7a1910b08fc3f92bcb59bd43fdde666c9e1e3852c4d1c95e388ee2f41. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17f80ea3-10a9-4450-a2eb-ac132e2679d3.json and https://artists.proofprofile.net/proofs/artist/17f80ea3-10a9-4450-a2eb-ac132e2679d3.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 0xc9648cb360daa5d1dd755fa6be110b9682cfb6032446eaf59a4d7361906c364f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22035417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9c728fbc81a8d56c86abec5e1a843692ba393d43b472a357a286b3e0cbb27d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN72585473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3529ae8a240f1160851d5b0bcf72545de6d1c4007f8dfaf3d71f35e4e65f0ed. 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/QZHN72585474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1a775a898572567c85fc45a0849fc20b6acb38473c75b8fd31327b118f2fc1. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:30:25Z), 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/QZHN72585475.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e2d5a515ae78bdfc1abe8864b25872aa8778044d8189ac9179c2402529d656. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHN72585476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53edf4b46b7bd0f6b8d15b2cab2ae5d23b20d9395d88b14249626db758cbbc28. 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/QZHN72585477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb3390576017acc21f48e313f663cd514d3f392af4d46822cc9a493a3454696. 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/QZHN72585478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f37cfb979bec624fa411a7bb7b451b72803fea1940987886ec03dc1943e5ebf. 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/QZHN72585479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb79927bbf57cc1f8da57fe258da4f2f73727cc0baca929879d8af42b87ea8b1. 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/QZHN72585480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e0ed1f4ef3f2655cd9ce16bed20f8e99ad53f04bb9d49f3290c1cf2eb82634. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB32207822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bed285ef1635c69caf8c8c41b4347068bbebc0c195a4437b3b01480e5f7530. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN71979409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29768749efa94bab141ed50654fba5307eb83f56803c7f8e91fee1ff203dc0f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1986390.