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 0x31c43331efefffe29571501251bd03e16cc2854594dc70b46c4e34ac8e39b3aa. 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/7ee81ed5-bfa3-4df7-b967-f9076b85527c.json and https://artists.proofprofile.net/proofs/artist/7ee81ed5-bfa3-4df7-b967-f9076b85527c.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 0x02f551b83327bdd81ece2497fa207417b858d80f02e8c251cee58784bca705e8. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USHM92068927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f551b83327bdd81ece2497fa207417b858d80f02e8c251cee58784bca705e8. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USHM92068927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85bd0cd3b36af992886401ac24fff0cadef161c426ae62d965ef82575f477b4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCE7P2400835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8eb7703d511fd9cbbda0efbccf9f0fcbff4c3e83f41971cb8f4652bfc4c98a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX202489115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f46568558065fd8f8c2fcf5fce3112041d5f9f9e23f8674118f2f295bd407b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PTES42400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320dc1d4c107757035f2187dbeae97b933016239d0e4f77672e8fc107b36a669. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXKG22400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6582c731ac8d694a6198731d22141d2aecdd7fc8bc4385addfa23179f43a8d5. 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/BXKG22400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8b75c30554ed543155bd7ec3d7bece5423052ecc05e498b45764b33afa3c28. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKA822300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd06046bdccc64f6caa37d568f81da7314f343d7e3ffb5fcf87b214bca3bb48. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BXKG22302319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285896af8d5ba5509ce2909b063f452c34820ee5831f5ccdfc53f5338cc1ee88. 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/BXVK62300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854b3db0fc766396c0b3d45964136a8b275349ee17410ae3bf1777eaf8b4e466. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXVK62300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cde6fddaad8bcca98348c61af8c75d08d52ea0ef7498a33a541c14ce4e72215. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/BC3PG2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae14fc84ced97e57fa948fe92de6241786daa146eeecaded7ace6c37da2e669. 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/BC3PG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfb9cdbc21332c9a3f3bf0df7806716b4b28c523e30e592479817890bdf50f. 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/BC3PG2206832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dc6bbbf018dc426ce61adfd9e163d438908edce025f41771cb29a676c74ecc. 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/BC3PG2206189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795196360f69f65e32391a24741ef99e9ccc3f585edb9a2cf86406ba868bd33e. 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/BC3PG2200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf968c2c8a532282ec12467d454b082875a4a524430fad009ca6ca39232ca7a66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BC3PG2200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bd8af7ed8b85712add24b642f521dd78c178e516ba5df04b196dd7a95029e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BC3PG2200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c5ec5c200b76affca1ad14c23c2decde253eb513b5f209dde68168860e3492. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BC3PG2204126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cdd215a5b25d764c6feeddc51679b0a3afaba159bcb49313cd61239b735994. 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/SE6I32134368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2340ed251030cb434d17150a8b81ea9e3af163b68c779bf951429be812491411. 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/QZEQU2121269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2064396b20823341b005f957f69994c63f279c327fc06bbc291969159b0b5774. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZGLS2127825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb516dfe20cd3954d629ec68962bcff7756def4d960dec4c16588b6fd4ff75506. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCGL72100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ebf22e778452bbbfff4e2cb2c4a2435991eede4450d82d4e59b491e4229999. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USANG2199636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57657f32554bd82c883054f62646ae72912e8d2f5579327fa65a2a3616a0c55c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCGL72100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3179f7681c3d668b9c300a94a65b81a97711de9203791d69a65d8694cc110b55. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGH2105247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4af36346f9b26be27662f1150395339cac0c6c94e57fd24932c6ebdefaad31. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCGL72000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cae379819bb488a5e8938f047a4ada674cc0b61052930f1be08c43819ce1904. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ62024344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628fe60fcce2372d8701d2756cff63e8cd9b6ca08c153bba4fb8f7029ca3e3f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ52062352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd5db8e5ac9b045338744411c083dd7f178810915d0afcf5a5b8459d324044b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXVK62000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ce63af5ad849f6bd254b68210f71be570ed0a0fe530d1730e1563f7f58cebe. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM82031918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7be03c55fff4652677f436b8eb369cb563ffe6d8b15dbfc38c655ffa70beab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ2084126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16716d9e07ce3a679726023aa156cc455735b3741b3ac9e9815c5af2eda87f02. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGJ2073952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4e7a037af04d6aef3ab7fa7bd62b27ba629e3c23a6a7663b1022ba5b5b6bf7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX9L12000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb4bec2f1c48eece873ced5fa18e7185961930dac18ea9654461e166abd7e9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCGL72100007.