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 0xd7cc64096302df5cd73e22f96a92a722d219e771edf8aa21e2bbafafbc89859c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dfc0f29-a703-4fd3-88b1-fbb8770068fd.json and https://artists.proofprofile.net/proofs/artist/8dfc0f29-a703-4fd3-88b1-fbb8770068fd.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 0x46fc582b63241ab0c94603eff9d6a5d559037050b7b6039dbf9fc1c6172ded4c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6L2588789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b21ef6c5ef6bdcc6156b4129bd8dbc593908ba322dcb8756cbe00dba88fa62. 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/QZK6K2528280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948b6b165a91dae19b896b0ce77cad4c29d4ab4c59bc2b178c0884f13bb40e54. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6L2588774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9489607075caa9a58a79055a7590ef185d30451ba25f5c90c406f17c53424c4e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:03Z), 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/QZK6K2530116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8d719171e7d0932cce88ca8bdff3bff4356ad9ad16e7f20703d1651434b3ac. 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/QZK6G2521094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc8f7192257f47054c3f28d75f107779b09e45644960b58feaba7a88434eba1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:56Z), 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/QZK6G2568352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd9723a3360292fa0d1cd24b68d6078824064c38380ac91c5b6ebc6f7165038. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:33Z), 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/QZK6G2523547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8a125cd645348b7d160778f4c184b379abf555ae18acadce331ff021675feb. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:56:05Z), 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/QZK6G2523518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa424008723e90d56f0ce53040c6e037fac854ae169a93b56c7744434608eb4e5. 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/QZK6F2512693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7d04828e9d7b42cc687bd68071e51dc29126a77826701d3ff10f75c91a3836. 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/QZMEM2505672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a7e0ad4d5395cc6c29b642b8312b69a117d8efb3852c9446a4bc4e8b0b8169. 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/QZMEM2505678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649d949a62f3cfa827781586febaaeddec95533547c92930b0f1bc3264f20058. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEM2505674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f738d7767fb007ea33de8b220429f45d33e10103972c05bbd487ce5f7877b9f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZMEM2505718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299fd3f1f9bea583346161a95a91d8a6230088bba5e6d4bdb528e444431541f8. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:11Z), 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/QZMEM2503494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e031f490c4b832e4285da70568e31765e37eeb4355d8c05bf9d25d0ee2813. 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/QZMEM2505690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0aff44503fbdf48eb015e4715da424809a80f869eca0a4e87d649ad671bf6e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:28Z), 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/QZMEM2507891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0179a70166e355e404286d96d0ea0d201ac65dfb7e5f6666f15a72f88de6fb. 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/QZMEM2505689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e25864f6d32d8ad05e84d8cde5b73fc8ced67fcbb97a8e452b325547ee5714. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:27:07Z), 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/QZMEM2505673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342c616a51acb447fb5bf36d62203e4a9d27089f2b0ec03d96b0188009dc0c48. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMEM2505728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71289b410909dce0876fc55d60d752903521810fc4c0253dfaf34ee5409498f. 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/QZMEM2505719.