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 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 0x0e0c6aeda4daa0995c336ec61daaca03c0cebe59edd86b4655e0757677b89cc4. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1342ddf3-f51b-4a04-893c-61f91b615b12.json and https://artists.proofprofile.net/proofs/artist/1342ddf3-f51b-4a04-893c-61f91b615b12.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 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 0x73b1335491118da62b4f1919e93a187b987672cee2d118407221716bd6bb1a8d. 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/QZNN22189061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2faa16ee7fd91a7395152e355b33537ce795bff24e351f8f6b4644a943e03a1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNMZ2139667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7acefc3158f5ce481435587ca6675f4e92099fac64e845ad9d595b0d98659. 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/QZL382233029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4751affc4740f1e7d54a6dd45681f34f2e4a017181780d7f15656ea3197b5e7. 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/QZNMZ2201167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520e8188f9be232e5db8f70be2675c81c074d354ca96c58504998a04bdb74fc8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEV2383505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60717b3e85bc4a4d86e305f91ce23371b79fb237f0217ab5be81bf467d5417e5. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZMEV2383509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2e453ecf5c679ef93cd3e10aa30f22cab2e1d33f196ee91778a2f75f9f25f7. 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/QZMEV2383510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc718ddb198d556f0ee07e5562be7b71dbe40bc47cdc98806ae043f465236bc1a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZMEV2383511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14b2658406fb3072fcf95b335dfbb908a5c3081e5d195ffabcb7ed960ed3239. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEV2383513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7332f01a3e9df8f2e8679ea6cc7a752cb032ba62519d59f20c1eac4593640439. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNMT2316157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef50ae4abe14727bae2869049b04fdbfb7f20ea69ccdae40337323b03636903c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTAS2383486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3136601ae2f700768998137163bae35da6e8c75bee7b75a11917529a71570616. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAS2383487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd269a6f211c530eea2f61ba16959592d7e458be93314b002d2d33142882041d2. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZTAS2383488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb954357a1468d85560775a0aef22ba0fedae1ff81c1e20ed9eb2861e5a8c2120. 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/QZTAS2383490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711432fc92275b64918bbc4bd0460ad0b378c422102a06143df1a04d34b9e3bc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTAS2383491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e06ca849855dc070f7b76c9276067b44e5f93f9d19441ecc59c72473178b44. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFS2406876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65b777cdb81ddb2df6b9c8753fa121e08ffbb35e87a96c6ed641eef5efa98f7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZFYY2559199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fb01da7ff0f4d01283f8af7216b5de6b9c8cbc9e3e851004f398f1c974ddb2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN52526385.