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 0xf9f616eaa6f493e5ae47f9dfcac5478d4792bbe199ea8c898519a1c780fc02e1. 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/ba016c07-1ff1-45c6-922f-b1989a64f1aa.json and https://artists.proofprofile.net/proofs/artist/ba016c07-1ff1-45c6-922f-b1989a64f1aa.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 0x3dc7c0bde17c7413663ea54897662a882a8391f8bda8f1e8a21b8b778b951863. 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/USUL10301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac22f30210efafd1a48f29577cc0fee5ef5e50ac698e591bf3afcad983d193d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USUL10400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf223754c5f715feb30020bb98b01a3a0f724bc472a086cb417c8d197f09a4667. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZES92569540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09c1e255b4c8700802fa822dc8e8c124c956c630bfd1fd7aed40b904be8bb8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFV2540073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc0d0f934d7e00079422fb71b0d4cc60c2f1dffc554cef1701ff7410501a93e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFV2540074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa883584a0b540d9cb69b3b768d7ce3d261fe7b69aa08c84e25734b2ee79522. 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/QZWFV2540075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0c981327cbd18c13d5bcfcfdef51ebb79e3b7d1f11e9727178b6f3a95366b1. 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/QZWFV2540076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31338503981da11d61d64cdc290b6415328b017cc76bc3568253fb040c47bd6b. 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/QZWFV2540077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fd65435187b42f76b261c175345ca4953aa95d6fffa3b36808be4782e2f4a7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFV2540078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9019ab13743c33183c35ec04914b4af76e8a3a5b933f2d8ae6a136f663a1ab8b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFV2540079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fda4409f9078ac0b3d811535677487643915c5d936a257d227a9b029cf56b7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:43Z), 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/QZWFV2540080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74412c7a3ecea6abf9ca844a997e2cf8e32a1c02a0adcba4a7d62858424e2c25. 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/QZWFV2540081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e6f3f116722ce261435292a28add6233c830337baa8729f6763538b93d88c6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFV2540082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0754b62731b82b944dac22f917779df599aea8247c688306a9501bbc03629035. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFV2540083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825dd55520f56f68b6b37da2261bc80531c69ea0aa76c9438d0da21dd6402da7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:07:31Z), 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/QZWFV2540084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dfddd0e78c3dce298124b3ae94949576afbcfff159b5dde9078883ea355a18. 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/QZWFV2540085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feaae21c02a0b846f404751a241568b3ca648dd228a1b5825966b08b5072e51. 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/QZWFV2540086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176a4bdbdd692fae1cc0794021cc3f080528839b3a885fffce86589d33208f7e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFV2540087.