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 0xb811923a8ee6c5c45cb1f97e06357d45baf132949961e138e1314a1c455b9abe. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf4dde00-336d-4ffa-95a9-6b1684d4b128.json and https://artists.proofprofile.net/proofs/artist/bf4dde00-336d-4ffa-95a9-6b1684d4b128.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 0xe3b804c59559e6d1426f5a6f9a080141964c9d3746ee32b750bc441db64d12ff. 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/DENJ11000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b1b700c3d708bc0cfe28e0e4148c161e25ddd0c3322f60194304a4e8fbd3cb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DENJ11000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4b80209afe0fee26447e9abecb124cd83c24d8f317d9dc103bbd439438169. 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/DENJ11000003.
Rotation 2 (Arr. For Marimba And Vibraphone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bf4230d8cb0bdb21fb39c1853f857a30084eae724efa6193091c632f492787. 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/DENJ11000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4c9b4c2243b990e59b5582a37bf97f88aa04d8b4a94776d5191f16e836eef0. 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/DENJ11000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5845329652990a580019d026da63ba12fc6f49bcdcc8831109e1289488cd2d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DENJ11000008.
Rotation 4 (Arr. For Marimba And Vibraphone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b288d2211434845adcb9f90988e713c5a3dfe01eb70407998c7bfc16e1f0a61. 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/DENJ11000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05595342e7dbd290b6d4d6584323650875fe17ed5adf1e4983f3a4d1b169886. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DENJ11000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7820f06a4bd7f7bb93aeeec3d0e7a55b2a762aa0df65519a079f24cd37c2569b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB111700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae91945961438de262e228a229ae1b84ce2ae7fb72d1fe2f3d675bbb9251a5b4. 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/DEB111700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4704e26fa8f82fa9aeaa3baf6ff80c57501c7c87e872f2cd24cf6aee33bc3c59. 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/DEB111700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72c1e6e7f5b97e2ac227268d0fbccb69c661fd9bb82e0bd0750bf2999427f42. 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/DEB111700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14f07b77f02c1dedc672d6b669990c18b94078989d33ca5e9fcb343ce27f77f. 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/DEB111700316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40aea88a2909351d7eb684b7b910c08bd6692a54ff84e18a5f8806a9ce66e9e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEB111700321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3de17f63e140eb903df74b82152ac489743cb1ccde98b34c5e5256717cf0144. 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/DEE289882501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bc2bf0e495234e3f4bff85490642b1051e31c2ccb3cb2cad4fb7773cfe1397. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/US2J50400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470d622c1f5970bd598714b059b5e8f91277b76eb4c996e9b692f223b089d71. 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/US2J50400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed6106e2ab2c282b637a579175f55b8eac67d1af114b5f4537cef4deda73dfe. 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/SEXDQ0600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470d622c1f5970bd598714b059b5e8f91277b76eb4c996e9b692f223b089d71. 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/US2J50400101.