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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 0xa7b1042e8596853f564d804148843e0449c39f7dd2f4cef56c23eeed9fdab4a6. 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/3f3a99ee-1ec0-490a-b124-eefb94482545.json and https://artists.proofprofile.net/proofs/artist/3f3a99ee-1ec0-490a-b124-eefb94482545.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 0xe3cab31a4146bf8e4a090eafc2b93c8f53ba787c5560b55c84ba6da390958639. 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/TCAIJ2402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15094e588875e74654954d6591e267bbfc6b27551002b2e58b1c79241215ee32. 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/DGA0Q2343277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea08cd028f93d0c81ce34b58c7dd9ccd66e69c2a14ef476f9d7cfa1e94586a. 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/DGA0P2434643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6d3b9e54c5e915b41918148d008885302f41bb9f0423b1f7ca4fedf109d383. 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/DGA072493860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e2249b6d0d1dc1752d2f342570aa6bf0ecfee3e70d4a7cbf3051b673857493. 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/DGA072493861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5084b4d4a59dcf9d7f5214e8271755b5059edcbd449035eddbdb3862edec4eb6. 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/DGA072493862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2e73befb97334d1a9bb158420ca8382068722b974b5cedb7cc3b808326eda2. 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/DGA072493863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad60f0f2df326d428a4c611416f1726337bdb8198796acfb167714b070484f2. 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/DGA0Q2343273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6255ba3a04ee8dce3c3434f02e53b12193e9dd816282d36d297aad498828d8cd. 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/DGA0Q2343276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784fc12714c05372600d7195c03b8ad8994f1b4562643b8a36ed3247ef4ab228. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:17:02Z), 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/DGA0Q2343278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fa535f3c9e7afb7d2ec12d85acb83ef4da74d92757220154421144e827865. 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/FRUM72101853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179e9579f28d8bb542d4b3cb2bd81956011b09a4050b9c1050df138e465ec80a. 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/FRUM71900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ddce10b0eb4ae32b889a6fb6ebfeda35f0cd54a646b4ee4a548143ce10b6c. 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/FRUM71801677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305ba54594546b5513ef367c36fc9bbd13607bd84397c7c84a97b7d5a9ce6bc. 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/FRUM71702163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cd32bd072d21574359741d5ecc9f3fe1153d3a8a3a1b4234e7cfe95f567cba. 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/FRUM71900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0018708b5a7d58b9448d08d691010fcf93d1b4119441499f4021c42ddb757ef7. 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/FRUM71800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c38f7f50ab85c4d381e1de61127c3d0963d624c15fcceb2f8c06d4fed669f0b. 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/FRX282527227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fca5e6ae9cf3edacf49e18466d6215da5620cfa6351ea923437d787753e616. 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/FR59R2599410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858b9af0b5abba6a089e14d61b8f6f5f9a3c4b2499e876f89fa9f90489573c22. 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/QM4TX2500776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b55e555a9817c8acd64318c7499e75a2bde7bd912ee9e1fe03f09caeaa0a08. 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/FR2X42542965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353ccc73d64cd6c1c7dda8255abc04efe1d37be1b6c9d8dff089a2ef323ef6d. 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/QM4TW2534291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c877d53be389e9a7edb3ebae2149a96961c011707c05c14d7389484a13edc. 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/DGA0L2499479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514c77836654a60f2487c79a0446ea5a948d100c9ed9ef6be8d722709baa352. 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/DGA0P2434642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea08cd028f93d0c81ce34b58c7dd9ccd66e69c2a14ef476f9d7cfa1e94586a. 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/DGA0P2434643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee574ca46f3fff0db7c45c84b6d959236db2ee997e42060977a93794cdefb8f3. 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/DGA0P2434644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cbcba4ad18f61f64786e262b7eef6b55b1162b30ebae104a8c8cb8815d6328. 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/DGA0P2434645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cbcba4ad18f61f64786e262b7eef6b55b1162b30ebae104a8c8cb8815d6328. 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/DGA0P2434645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c877d53be389e9a7edb3ebae2149a96961c011707c05c14d7389484a13edc. 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/DGA0L2499479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe673c58145c2488396963c64d60a43b6498b5477c36b5c4802193eb067186e85. 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/DGA0H2313562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff62091127111052e7354b0ae5f91741a6147ed75a12bf1dc95acfa52d2c1c. 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/TCAHD2305193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd475da54d01e2037955a5f598957453eebade3b6fac280e96eea307dcd0cfbbf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRUM72201768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449024d3b2546b05ade05067c4df3a9267529ea563943b73ac21d678ea036a47. 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/FR9W12205347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fa535f3c9e7afb7d2ec12d85acb83ef4da74d92757220154421144e827865. 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/FRUM72101853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdca9fbbed07f5c829d79913ef22d560b591019dc8701b8ee06d0c30f4429675. 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/US6R21457251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d8a071626422afaa99166d940643484046180e7882fc04fca4185ee31946a2. 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/ITWTB2401390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2cab902653324355b6cf33d5ef8be63c854293b9fd2b44936eb7058bbb2690. 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/FR7U62100221.