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 0xf09020d533cc0da7a177008d6af1bbba4c21dbaffbdb66566a4eb122fe6a6c22. 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/22be6b21-0a44-4d1f-b6a7-bb0c2c3ad005.json and https://artists.proofprofile.net/proofs/artist/22be6b21-0a44-4d1f-b6a7-bb0c2c3ad005.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 0x9b4ad8b84caab7bc876b37262684b072338c2f1ba9c75c580166ed6c3e66d4d7. 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/QZNJX2127739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e503644a936d8dc64a37fa0d9265ba176a3334f530787d075e694e9c5c5e35. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZNJX2127742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716ae3d3c2de8edec01d9dcb7a4bacc7ccbe8d4006edc0ac25c5507c25d3512f. 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/QZNJX2127743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b0ef36741d805fa20e023fe23285afd4d8bdb147eeac16474c7a7ec463a235. 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/QZNJW2193693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b7fdadf5d71e1aa72fb41cefe3cfaa64fd3727e14d4553ea780ebabb58c244. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNJW2198710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677e3e721220bd08727241044bedaaf8b3d2776b0be7b80330fb20a0f4d96aee. 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/QZNJW2198711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4c76bf0148f5fbe2ec5c9229dcff5ede8f7973df062ce605e31e399972377d. 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/QZNJW2198712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecabbe53cb5de41a5959a75621ccd424613c20b1fc6d6327488ed3d6986c915. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNJX2110266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c8262a92af300d2a8dc79d8a57a992d469de28427cd52963e55b9d5df1df14. 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/QZNJX2110267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbff6af28df8a6e09483e69c585c7712a7027cbbe76282dcd8076616fae5100. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJX2110268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d36f89fea424d3a51e2cc73f25b979cc7cc99f718ee7f58499fcfc4f3e37f4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJX2110270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f103dd8b28c0c0e41afe510d04b12b8a851a69cf67b0673c9334aa3b4ec51. 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/QZNJX2110271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4a7db9a80d85f9ce20eca6966ceacc0dc662b01add6e3f745a35e3dcc72873. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJX2110272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4e787fe76d10eb486abde3d077e7d1165bed5da67241b286491f3f18992b41. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:35:00Z), 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/QZNJX2110273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8e13eefbc4e9e0c091727fa9987ee10f7018af6679c9c12d999baa388043b9. 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/QZNJX2110274.
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