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 0x22256fb75cc565b2cce819c2c709606e5d716b9e1115abb7fa149bb8775f94ea. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b4faf6c-f3ba-4ce6-9a87-9437025cddc6.json and https://artists.proofprofile.net/proofs/artist/5b4faf6c-f3ba-4ce6-9a87-9437025cddc6.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 0x83f9367232dcbd6e0992b80340b0ba04d2c38ff6c3db68c65e92e97527c6d692. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GX8KD2558987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e902d51f09a21e0fd1ab514ef2fc4605a003030aab644e797dafaf151d6738. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GX8KD2525431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622c95c7ab57c267d0b2c6a014094ac8f29b0f70e150d62c1ce769de113d3d89. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ62509042.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9c23e21c8af585cda172808da4d994ee0a2564cb86dfb976af8ac74bc309de. 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/GX5MY2480571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f547db3e125a7cc556bb263a92edcf0c1d122b6cfc90bc019fa5b631dacd71. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GX5MY2451970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dbb16191a679bf45c540cab8fa610d70c1e36ce7274ce57f2a8c3d4f4c3a7f. 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/QZHN32405188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e95fe6a6ad89770a2146de356ae1dc4f07d2a3804da7883b9a990d7c41e6b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ7R2433127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb00af497e2f51631fb6f4e0452d8ecd9c665825b282b6c34ce9a701760de7. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:05Z), 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/GX8LD2505450.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a89963bd295566dd2675d2bdaea3b39fb20139a2bf1fc9748570eca49121515. 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/QZVEM2554689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4922d512d501f0624101c4627354dc84950c7ece89550d22cf3c6c461f5b6f03. 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/NL2J92507905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cab0eb2834d03c481d7c8685c8377b1aab3fa23dc635936678b53a5ec60c40. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBB2575842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd310d809ce315057ca40e8f1dfc258f5fcc4d3ae19cb37696439917a5681e118. 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/NL2J92509527.