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 0x607abc8ae308b8ed69b027c083a208c7e4b758d56e641b4897b59d818b2e387e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc188c2f-c710-45e4-aff6-2f808eca123b.json and https://artists.proofprofile.net/proofs/artist/dc188c2f-c710-45e4-aff6-2f808eca123b.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 0x1ef6eff399e279cb82a035b1adcc177e9439c3da6a4d086530b0131ea2de6ffb. 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/MX4971507708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cbf760df357e234d17d738b6ce42ba1b4a5232ecf231b6331ca718d951ffce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MX4971507709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebd72375758d65ca035afb1978a836439a024b2a044379500c086824684b3c2. 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/MX4971507710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e71cb385f773ed31843d752ecb478a5ecf7eabaf4299530f6ee081d225d05bb. 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/MX4971507711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73956773d2dda8a9baa964c5c3b2c632fe59f894ea8b5febce1495f2ef857f7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MX4971507712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752fe316e556be403a4db4df428f039c572d1d2f5a495ecd11c268dd5c7a6547. 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/MX4971507713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d9c294c7689142bca99b082954c2ce73d24b82854513ea560bfc3f5fa0660a. 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/MX4971507707.
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 0x2f16be904c40838ffb36009dd5a3d9a8beb05edbfadce9afc806aa4baa810be6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MX4971403214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c62c340db399e7c0922d611462f748de0fbc245171cb164312c507aa30f0693. 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/MX4971403216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ad5bf7743c7d2e8a600d437ed892adc3b6df4688e6f5e04dd70f85bd89b87. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/MX4971403210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5588bb48d1af92652f65d7d9474ea4fa9bba1f33f363018ada00dca5eec3ac. 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/MX4971403195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfec51076236d5fb6e72224fc8bdb8ee019d66014034fd54f7b41b1e99f5e4fe. 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/MX4971403196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb68f0d32d6bf2fb7ba9712ed4f07f639c363c3ba2d89722fd25857ca19c5cf6. 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/MX4971403197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca2ad2bee2b662155b0c71c19f819d33c2ed1a7ed09d74db73c430aaa49120b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/MX4971403198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed53b31255ee8e03071c7d0e3d90d1599ff9c7499860a779fd2bcaae1184861. 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/MX4971403199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf65c6ecfd00e29468a8f224a5f6a14f76ef8d45df5a6d136053f38567f0f59e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MX4971403201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c9fee647f05884cf9d59360739e6c028f31d9ad11ca003f12dcf252554ac4. 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/MX4971403202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3ac9019af0c1bd2fac2662c973322038e9ad1ae917a8152b803c63027a3daf. 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/MX4971403203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e70fdcdcb7f8191cb888027c86453ecfd0e458ce57e989ac63803b674036610. 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/MX4971403204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c11cec66908c951c3cc5b61bc8add2f84c63f2838b446e122f66f8d925338e. 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/MX4971403206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec2c03b0117f068833e0640f33ee8fe126ca8cb2112a59a037cfb6cfccc910. 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/MX4971403207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd2aa1937d6d9ab662ab5fb0db604cb7068a53c7463fb7bab4bc942fc8e4c13. 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/MX4971403208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c76c626518dc35d4a930d6b66b86cc133390032bddd2e2863601e25cba4c3c. 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/MX4971403200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098130b7993493dfbf389b2710ebc6a7b59e1eefbb0901d3ab1b0fd5927aef2. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/MX4971403205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf523e6c22d7702720a80a254b2d97ab8de2aa082e629f9add099d6d38f18820e. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/MX4971403209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf990867b8810af2f4538097ad7019f0dd5330a66fcd84c343201a90910356ab9. 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/MX4971403187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678acb17a5bb7bd62fbb7f14f810024c7c909a66b6d55e9d73a2f11e3757481c. 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/MX4971403188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb58943251c3c19bb0720d10b6da71d1a57d9ddc56426fb1ff5c0f7a8b501eef. 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/MX4971403189.