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 0x75504bad46ec6a846b292027bfef8217bcdd08b2db7ce2b2579a14a1797fd362. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c67b739-6853-4d8b-9ad7-4cc9cdc6cb70.json and https://artists.proofprofile.net/proofs/artist/5c67b739-6853-4d8b-9ad7-4cc9cdc6cb70.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 0x6076e4a610bdd917d31cac17761d3d7f243e89f906cb187b080fe9f140c3e84e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:21Z), 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/DEA550611828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14beca7d266b77de26c8e05dee18dc0f45846eb9c98f63677b11b09d235985a3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEA550611830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd9cf99696f34c819e825b00410aea42583b8194ea3446b6623b1c58155ef92. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:24Z), 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/DEA550611837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c4704c5438c354fca0550e8d3318e6bdef79514e5ce72eaabb393c6151d2d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA550717029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80828ea6c03d41e7cea6523550f16827eccf08be95dc41f10c2932c7bfee4bd. 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/DEA550717030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37944410d60b001e4e6c883202f5c1c3d32bfae9e077718b6f31b5f01969e87b. 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/DEA550717031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc027e45f872fbc599ff2d14e552a6ba204e3c922a5a91d397ff33a18b534ace4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEA550717032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c61de8011ca8d5e4b1ec61860854f49b89d6e75c8807af283aa5b30d85d95d6. 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/DEA550717033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a631fb363b5bfa95655cc987d085deb2575aef96ed297167b83c49d2824b8c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA550717034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db521e42ab9fbed6d58de713e47c1b8cec67811b73a55d1e898d2934600e163. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA550717035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb4dd516f09d5376c2e01ed1c29d3bd0c870c44269a74e8af7fba8e86c0e3e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEA550717037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f969be44660b67927c9dcbdcc05c7bf3fc66f8a4b3d54ba816225f606a2f057. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEA550717038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd21c0debf0e22419590a0d2cebe4196fdd856f370ab55c5dd2ece42fc8e304. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:33:36Z), 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/DEA550717036.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473dfe0a9f049e1c56698aa8e16baa3246f6c95716eb6d14da71ec87b9417ec4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEA550717039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96099dfab71663f8f0aa157a49c75ce683d426dd0b536bd591cd5555b5eef8eb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEA550919470.