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 0xd73867212125c0b63f42fcff9d4c234dd7b77ef463d419136ad39b319144b737. 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/7dac520d-f3dd-4c39-9f97-e60d1da8dd33.json and https://artists.proofprofile.net/proofs/artist/7dac520d-f3dd-4c39-9f97-e60d1da8dd33.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 0xdd6cf59ccc110f4263e5807aac81f9be57863078bf3a893b745dfe7226096379. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BRJGT1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950726dfd22c8d597e51d970099386a50195ad1771cc3d41e5a06de96e77f751. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRJGT1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f56e3f20f029d8e9a07e9e8991b4561086fb65926114db393248db6b484c2. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/BRJGT1600095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18bc579212c2b74e9b2037a5eb8580dd238669424f26e8f950f2be293f6b583. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BKOVG2400001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0645a365a02a5b016857ef3656128adeb53992b4a52258cbbaa94ba84faf3ce7. 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/BX4IU2314736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebef46077d84154b7a3cfe75bd38f229018c2758dae7862754fc18e81ee4537d. 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/ESA112306495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a6aae600486b902c1e86ec8e77bb3e7d9038c9080d2ce1963511ddc219b83. 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/BX8VF2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0329b4dd7660ad83648c56873aec2cfee69fab997b881a6c5c2a931737a1de5. 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/BX8VF2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a04e84206fc1e919cabd76a63073588ba2205a1c068178f7c1253a0919da7. 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/FRX762227053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05282248ca74e3dca35f4373fec15ddf120a3cd424b032223ffc9e4d25370f9. 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/BCEFK2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659b3ff7d44d041f47c4aed9bdde6be6c02c2dc02709393797fca51675168e93. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCEFK2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7fd30c4134fc26b573240fdc272fcf27bd708c1f31d1e781d82939ee8f0975. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BCEFK2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de50621e5556cd70bdd7763c240662b61c819972b22abff7c45c6cb9fb05af5. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BRXNJ2100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85bd7ab760f3eb172f77b251d44055a7de3a5d6a73130da6c025d03c1ad36c5. 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/BRXNJ2100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546e38144f024a28e6e2468fc2612704b8da6ffe1ae93c3c83d3235115cb8a7a. 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/BCEFK2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0483d0a46dd920d99e21209c46805ab4e1558ebdf619b58c3d2e6dd24c25ce. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRXNJ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed617e4c3ff4485709380caa459fc340c95660e0b63bbccf4ba48c2cb13a925. 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/BRJGT1700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36cebf701ab193f1769b08c120079e20494edd29ea8cf85e6a684dd156d4975. 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/QZQAY2592408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82c6fc4df9ccef300154623fafb5e4898c0e680cab1381b4bc0d5970bb57967. 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/QZQAY2526486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd6025e2b9d6fb5efde1bb31f27062dbc5d7b594ee0f3af5d509b6d4c0d916. 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/QZQAY2505209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bf67e982c11a54c722530b6a07d2647d052bd72fb31ee9f5a19ff889717308. 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/BRJGT1700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473698e1f55eeca579fd3a2b39cb163ffb5450e7bad20f79c1b13e401400ea40. 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/QZQAY2526574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d7369cb8a27013a41530a13c66528a2679ffd848a38e2bc384a721847c29a. 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/BRJGT1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa693a8fb2f64da7a1a28fa040a12f20442edf83a6d11bea336057d5267a400. 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/BRJGT1500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa68a0eb4e11417c3bd6a0c3d63a8e4e9cfd8a54a978dc6718e5f8c5ac20cba. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BRJGT1500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fa5a5ac4224aa153866c1324922258923f5e59752c63257dbfc1d6b6714d55. 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/BRJGT1400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe84b2ea03b3d15bc8e3f930c5b80f1ffc4d809c4ab513880898d90ef1a565b7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRJGT1500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9351dcc35673c0baf2379e61c5a2dcd02c848e502edc90e0b0928ccc908718f5. 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/BRJGT1400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e87b282e9cf027619da6a7b07b9550fcb5f26ec778b611461dc09e58b4f5c80. 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/BCEFK2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16559bb071eddc54bc75f3624ecf3881104f55f4e25ce2852cbaf4b604e7d814. 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/BRXNJ2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16f2792dfc555b44c26c166e0cca9ab83d352ca44ab8b0fd492b856d132492d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BRJGT1400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61374cb22cbe88e4611822abfacbf1e360bd842cfb325b58803543d0be2cadc2. 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/BRJGT1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111008f44666a9e0602ce191f57b50348f38a373a3180efef10c89bab5916006. 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/BRJGT1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9351dcc35673c0baf2379e61c5a2dcd02c848e502edc90e0b0928ccc908718f5. 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/BRJGT1400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925615c3fc67d9ba65ee258003cf9d220e389b4f43d417e506c88a70e0bcb41a. 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/BCM112000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925615c3fc67d9ba65ee258003cf9d220e389b4f43d417e506c88a70e0bcb41a. 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/BCM112000001.