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 0xf702112bec037edefeb1616b67ce70e7a59b7284ecd632d8d8ddfdeb5eead9a7. 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/38a2bdb3-0a9c-4989-892a-b72241075731.json and https://artists.proofprofile.net/proofs/artist/38a2bdb3-0a9c-4989-892a-b72241075731.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 0x94737daccf3717576f8af0522a8c6cc82166b7d5f864a409aebe13d81bb46b42. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPB602068374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983caf2c0a866f75c58b267dbae82fb69380c11345ed87fc1b965cec629d963. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPB602076102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4e39a5c0f4765a7837e097d9d676c46219dd9e35f18b42e6e2e87bd779dead. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPB602076106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc115910bfa429460a932422762c286432dac9386a48fc934f4209305fcfed87a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPB602076107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a4a646aaf90419656b45054ec38488a795a936201f5d7096caafe449c9fe88. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:13:37Z), 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/JPB602076108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf105f50e5e70a05f85acddfcbce5dca8727f01a36951c3c2bbbd07acdfcf128. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/JPB602076110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7171a05bf305455281f2c972aab5d92f3daa38b0e2833f8642e06e21affa1a17. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPB602173063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dad7ada67fe2466a411a3bb662491f41e4d5154bdd4f728ac5da3284202757b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPB602186396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d52a52628172cd9eb2cd21e9fcd7e8750b8751566939bdb329534266d3f360f. 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/JPB602195525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ed01d14d880190fe45eb3b10fe95c3231ad2e0bbb49cd3c5d04ab3d70edfc1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPB602103833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c3e48282ee48f0b4295a896a4b1cc2761c481e8848cbd3cd619021995025a9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:31:53Z), 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/JPB602103836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba59a3b81d3c65d5c0de04796c1ef6e9de29e9b032bc7981f840a687413bcdb9. 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/JPB602103837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bed33da91b420722a24af6a7b4d1269ff985794aa1a036dbe9c3181c29e78c. 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/JPB602103840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d52a52628172cd9eb2cd21e9fcd7e8750b8751566939bdb329534266d3f360f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:15Z), 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/JPB602195525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b79da5178a88858b55c673203afd9ae8653e83b3af49a8be12ff110be45e33a. 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/JPB602103841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776f2dc18b5edb6f77fe27cda8be456f2977a546728d13faa51e3da35c6d567a. 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/JP92N2218401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714c8dc336fdd5136443ad7950559589459b002a2a1b80bcf2f250a4bbaae277. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JP92N2233920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef308b2d8621acf192ecf406485de3ae8cc29a93df4d5af8bb229df224b8ea0. 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/JP92N2259412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a781926730eddb40164c1dec495031bef243cd74a33c28b57ca5fe350b485d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPB602300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800482899dedd9248316598b7312d4f6ad0c0e0b005557c2ed00c22c5aad72d1. 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/JPB602076105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b59f83b5bce7aaa1d8d3ea1c4ef3f84672172cae6d43f2d330e2108c63a7f4. 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/JPB602300635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb79ef9dc0933f2efda584709746cd7da798bbd085a5eb2de9164f1ac6308f4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPB602204923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b7444029ff206ee5a29f4d7c025bd418c0dba53971447d885660d062a0fae. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPB602004022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84c1232624936abb07aaec73daf393263f0257a724b9c9df9cf6bf9f1393b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPB602302536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecacb1b1016e57fd671fae2d5a59a5a0b8db8da03b6b91a2b24a719c25bb991. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/JPB602304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dbffd88f8ff0b363de14c8d9e006ddfcf9da8a614aaf69bb91f03447e83a1c. 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/JPB602401293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229e6ff88a56b31ef0546d794d60bb3caacab44550508592f9f64874e735b6cb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPB602403196.