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 0xef73213204261b692df912ed97ba3a78262231a454f4db66fc884d23d8e731be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c803b68-3caa-4ad3-a1a7-c531c005dbe1.json and https://artists.proofprofile.net/proofs/artist/2c803b68-3caa-4ad3-a1a7-c531c005dbe1.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 0xb0a7f165d113c9c455b5a18baa7ac0cff325b9ba4b6a8dfb44bf7fa2ab3f98c0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES52036686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e519a3bbe3b6df7a20039a66131ff161e2f87047c6d431d882549d59d5e4ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES52036687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0a027e5e346149db46c68661bbc6ef28b75d0345c78df408185f4a36a8a52c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6Q2068028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1832b8f6938fd8e10a088b351789ec22402b7ea551f5897a41df39acdeb54e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2068029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bf04cb8b3f3c3364e283bc24fc611c63b161ca95d8626eacddc115f614cc3c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6Q2068033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867626f0caeaf6a512394289a732b08bbfce77e4c62fa73ff961c87ca5dc55bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2068034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe101266c41a1ef9e7a880da140131dd894ebc4cddcdfa729ed1c2a070f345004. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2068035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69f1a757b8dfd82c7d7231d1ad4a74137674f87cdf9bcb2f89af46b980f5b72. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6Q2068036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7764c542307c6b9ea222e3e2945f7c04c5f2e1bd10291a9323fb2bac77fa4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2068038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6180eb4551abde90b3f5a0e9b52f12986474eae02adb541810c18b94b0e5f09d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6Q2068039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf13b81e9b58288920be5d739dc18d8f62a19ec94d5b78cf52803c313ce2687. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZK6Q2068026.
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 0x3eba69b3eb3092f351c5ca3500d2477a4078fc6ee605aba53f8f97d352ed209b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6Q2068027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377ec1b4f13d2214ad74cd7106ad7b751c671ae3b03bae6706676839cf78471. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZK6Q2068030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36cab1517d083639613af24bd2cdb0ebac5a6ce8026c6bbc56d493612bbff4d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6Q2068032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bfa48a8ebd4c164ff025d76783716e09d838d9e7e970a08f21313614d54cfd. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6Q2068037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc684759775ff4ef29b99870c1969d985d5ad5bcb17d64172019114a09b4ba114. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6F2180264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7595778c3c70e1fecf73ab4991db86f412bf94696bc7d8d04c791237c75807d6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:24Z), 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/QZNWS2172424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac3bc34497ecfbb5dcb82cfa8ea0bb51d24e45e1afd61e8d97e4dc887db2a3b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:21Z), 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/QZHN52153918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a850d0c6465d0288f1f69777f457f50d82d9ad2a91779fba77c5439207e82. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEQ2205988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574d8befac3fed00778f6905edaa9f9770db57e8b2641c1e40f64ea1250c68a6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:38Z), 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/QZHNA2172089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe810e4eaa731149105d367882e516cc48a45fbf0fa68fb8e87357a1b8989c6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA82395518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3688720baa7063d8dee237168f0c99ff4b987eb98414c3cf5b2d49065aabdb68. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:40Z), 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/QZK6H2358101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4bf8215a2c4f4133452af947774e06e2fb0b272d4d5255abcda95a9813f497. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:33Z), 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/QZNWW2306636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f7fe500900293f0e4bb260f15a7d284a9e9630ca47c3a5ba1e342bc9d244ff. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNA2475315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e808d31590210b7eb5256b93843343bc9f595119479a54caca69e3cf3f21b9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6H2402921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac7e853d12fdc72045ac28ed79fadcdc3ce516ff530da3271abd5bdeb1b164. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:57Z), 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/QZPLR2408754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a4a247c2e2026b092b7fc90aeddbf4160ee71484b1e3eb7d06f8ec78fa0799. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB72414528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4926cec86eefaadf3df09013ce5b9021546eea2f262771860a8c55c00a5094f1. 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/QZK6P2557811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ebe2ebb835e99d99cf012d175f2ce4fb8209a9a9b92ef7ae242a318848c35c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:18Z), 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/QZK6P2557812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2375ce9514354568f4af6641f6d17013d4650e77deca05d3f5176073c985ea87. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:05:03Z), 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/QZNWZ2598902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a91732865d16c3259e393360719a5e41ac0d89a0464da98e182292b2ea4b26. 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/QZWFN2550631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445ab9da1e7e1a70145e4a281f362396c15a51c04a165638696abfc04ec2a335. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:43:39Z), 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/QZZ7U2583175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c680a6b8e26080f091b2394acabae69d6450cc65990469afb50634a84ef0fc8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7U2583176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b6f54161fe809c7540fe87b122f372c3d4e65946eec7662abf2a0f4f018ba. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6L2025467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1113c2110e35cd5c112192653b37152816d5c02dff98cf437ddfce3d7fa88b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZHN82294162.