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 0xeafca9eb6b53bdbc6f2650ae88427629c54fc66b2cf4e845744b02eba2e504cc. 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/c3724685-57f2-4f3f-bf53-20e4e3003292.json and https://artists.proofprofile.net/proofs/artist/c3724685-57f2-4f3f-bf53-20e4e3003292.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 0xadb62ce7a76ef9aa1571bf2654ec43f591f33fa21d279643ccc0ff91608686ae. 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/QZK6M2424780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b2e5b9c3f85c156b97b27c88aecb07fd66b5e23a6651c4ac81bc1223ed1ece. 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/QZK6M2424781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f7df35d09935894a14cd696f90d5b6b5f33b5ad1eb31d9d68fec098c694ccc. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:24:39Z), 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/QZK6J2428045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3477946c2841148f0fe00643cb8b190fee637608fe79668254d1b623fe942e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6J2428046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c9fb858a726d53edfb099c154b12a2b22489f678a15fd08aae131e9ea6978d. 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/QZK6J2428049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b95fe2904ebf2a1f474000fec703182438aa283bac4d8bbdaa82f61a7b3ddf. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZTB42456994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf30f30746987514f2afb514d51d996a2448cba2afd973370814b121c4407d1d. 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/QZTB42456995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5a9a41a175522b2791dc3ac985ec24da328302f79e9271f15bb2ece0186921. 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/QZTB42456996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87797cd21ce1166ae82a393585fddbebf8f69a62fa7a9ef624e0c4cc8b810fc7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB42456997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeff92d0ee34b4f9e05b98f8cca9ba6f31eb70f61ca1f965e01f07d2f9682b0. 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/QZTB42456998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd194045d7fde5664c6b1548691ae88db54a3f041a4c3d7fc19a268c0af872535. 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/QZTB42456999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83759b732cda267454b3f991edcf72c026dd879b736f8ba99ebf4d794bcbfb69. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB42457000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34a85d9625b6ac8dc103b9e687660405b31c251e273b97ea72bfe1fea233716. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB42457001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdaaa9f2946b8f38c0b54fd6318b6ba5e6d315327363c3e5f7012d59831ecea. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTB42457002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbba05f1fcb0032166b9e10ed925da8f9f2bd4c882127477477018b751121a2. 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/QZTB42457003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27fcf85db2d28d7d6f8548872c6dad31ec8532e6b121fb39f761b7b78d1f433. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZWFW2499172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e2780203f4cfd7c92b989d3b38c99a4c427fc550413efe9506f49e73b0b17. 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/QZWFW2499173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e24ab1efcfaacb339f8858bba0b3b5a70f193dfd89c2fa68293a88c899b47c2. 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/QZWFW2499176.