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 0x2a91475605a175917e96381d414e89a467589d62bb1531f72d907fc644000688. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3534f1e-7b02-4fb3-a020-3c0ecb0f7201.json and https://artists.proofprofile.net/proofs/artist/b3534f1e-7b02-4fb3-a020-3c0ecb0f7201.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 0x5e7975cf305aeee47b78a0af84ef74a25aeb3a7c7c43778adf69a813448ad5f8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SE5Q52100344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182c471346b61675ec4fd0249090a4c4768a8c3974091d533f53f8dcd3b2d6d3. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE5Q52100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d508d8969e3b68944131a5155dbdc3eec47eae6e644398f34c6c3148d9d6b6. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/SE5Q52102266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac2721250c6b2f0bd9349bfd6cc1f63d2fd0534ec79d33842fbf3770f45b00. 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/SE5Q52104350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3349a837cf447bf314a5eacb8e45bf45a53cde12eaae910abeb082fe6e7da07a. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/SE5Q52200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b60ff68287c834857f973de5853c5b26fbc8581f30de7e72c064414f8effa89. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE5Q52201731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82c53eda431f8cd6953bd8381577c6dc37a32618ac5d3a22bd8d8616f916f3. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/SE5Q52202272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e113980b69a8048ea01f81e64ce9c0a1db4da2fdc05953006b158b9b6b41f. 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/SE5Q52201544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eef5f4831adb9bd8fca0bb290f708798e64e4b601246ae571413ec3a7586f34. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/SE5Q52204053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bc82515128ca80060231eb25677750105d715ab53841804dc7279b3ba79875. 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/SE5Q52301245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0184ec4a6eb09d35d272783d61ef14c65bfa3286cd808e202dbc9a850cf9929c. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/SE5Q52300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c8ad5776dbe20252868ebe6df69ee3c0afeb582de0435bb8d43c73c161255d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE5Q52302211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ee39cc0cf1e965a444b9721d0dbd180a9607b2ac5d8d8846d29f0fecd0d807. 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/SE5Q52300748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed94159f2981eb834d30d8afdc7db37a3d308c6700a0dc4e9920ecbe8e9eeaa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5Q52302231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d019cb08b2214f625fdf36c940f439f88047be32ca1137b2aea052c866908b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE5Q52302764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9ebbaf7aed82df32939c17d2bb527f134c5acd55bcf08bc7b1b5a8bb304dcf. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE5Q52302508.