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 0xa23aad4453554b5a2158af640c9bdb546ed6aeec8af026d54f59bcda8590f607. 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/86d73f7e-ddde-49a7-b3f3-47f7ea249705.json and https://artists.proofprofile.net/proofs/artist/86d73f7e-ddde-49a7-b3f3-47f7ea249705.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 0x35cc95f01a00cf24a8808291dc4f62819bd456639029754ad68edb10fe879923. 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/ES5152300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e99437a95274f95e82f440610cbf4a6dd2d9164efa56d7fa2d64c0dc39dfcc. 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/ES5152300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db9e2dfe38cec5fe2c4fdf2ebe292bef6095c587b862fb850eb0300470415b8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518412bf85436a6bb9af08628e0c644872be88e11a5322b4a62aa35480a86a1d. 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/ES5152300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6c9f2ac52d9ee31fda361590d9169f4ac52c5f8600ea8872294fd940798715. 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/ES5152201706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5addd6dd6b1ef17e337cf1a414efa7d62de4a20bc189070ab191ea61671cc9ea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bf4dadeb3027a35eda9aa17c3258bc0815a382d95aee6fc19a7202227ee6a4. 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/ES5152300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7983296f356462acffb5fd589d3934089349f138dd6571cc776376662bfaf75. 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/ES5152201599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb7d01895475015a04bfaa45066c41b64294375bb423514dc3105b39a7f4ed. 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/ES5152300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf21a5fcf11ee4cd44957c2d0ea72e6228e0e947427a8e2623a0da33eb59cd2. 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/ES5152300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c94fda852d921e6e7fc567d1a503681f978b0ba80201f75e50083eda4cf6328. 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/ES5152300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905e886344fa919ecbb14affdaa5d5f1f514e0db1b9763d180c2298a262f3cd. 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/ES5152201664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a95e129ff71c5edf458962b48aebee7e0cac1189abbfdd3494f4a38211d207. 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/ESA092319218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429f39ec12e13edda53a6c0b91e628374671bb9fe4c3f2f70ae8916304be005a. 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/ES64E2489398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c684fb70164186a81174196bb2da99287d654558aabef83444e7a2c2c640d48. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA092333309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e4190eff2cdbce07d977dfca53cb4fd625f9350bc8a66e23ed94682e9f8f5b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA092310159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7a3aeac45824929218d026337300dd617764b0060038e8eeebc8153de6900b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZPLS2205713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24cb9af9d3e48f3a724e2f1c3cc37086f22a21aa53a3a6b32ed8d0674c43b23. 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/ES71G2115785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3356fe875341d2441641b97e99226312350894bab77f6985e056c8a3dad5cd82. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHM81991256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4c0f635dc00ebab13f42ef545f06d0b5f708dfe49b90e74a4447f33d0b574d. 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/QZDQH2204860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb73030bfdf7ba90f3af6b2fe6f167dc963048b8895c44408e2a63b096b5e5ec. 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/QZDQH2305277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bddeeabf0e14d114069534e4e1abf92bcb8fb24a8927a757e9c2194f36026f0. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ES71G2033481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe40de94feebd869d54853026480fdd973f934c09a4d1cc9cfecd4910ca8127a. 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/QZFYX2034916.