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 0xe1857fa0f6dc755df4a855391779b21b520ef147352622ac312a201184bcbb84. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4cb6981-3d58-4aef-96a0-0d2da0f8a898.json and https://artists.proofprofile.net/proofs/artist/f4cb6981-3d58-4aef-96a0-0d2da0f8a898.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 0x9ef0afd9e3dda287ab7fcbc79326ee2524c13f5f6e65e25f8f8690739127b842. 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/ITG271900731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f81323081c7821e5ee9983a2476a76f07ad7768ab3f4d7b07587c0f5650754e. 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/ITG271900732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9bdcca0e45dd045dcdef50cc5abfa035aa34c743c67171fc0c235328892448. 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/ITG271900733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd51b99fe900d979b5a1f8fa23ddcc23cfbef9355fbc6322624dcda1137ce846. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITG271900735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55e7a6b7ef69d197ab7aeccb251a8e970adbe135449c392f1b04022f6b8183b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITG271900736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1339d2e78166877862282ef4cf073a26ff828db30b842e6512f4ce9910a7aec. 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/ITG271900737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfe71a1a2ba2bf8b870f8054b461daf6bfcb39f83692ba534dcf875fd4f6f2d. 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/ITG271900738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed9f293a58e7bc1f4dc81d638804264371f6bdb413064193c4c174973e9f1b6. 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/ITG271900739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f296dd7894aabebff1a5981341ac577083d2be2586af93e28f3f489f037bb11. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITG271900740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e708e067327421cfcbab24e7f9821f579456fe01d23ac1d321574127448a899. 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/ITG271900741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cbb6334b80a6826267ab4edfd06272b7973b44e8bb9d079e1f582dceb1ac59. 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/USUM70952387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2265b4528b3e840b6d5fe643dd798361b99063a4c9458008abc4e5ff8f30b3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USUM70952388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14651cd805073d5be8f24b4e28bc677ed2a24d08dcc2f9eebba9f6486bd6c2a4. 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/USUM70952389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98400ea54daecba0016279406a0045e425b87925906c216d6e8e82da0ab6e646. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USUM70952390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199a55679f93dbed700a1bc5124e4690cf6a4062910b49ec0e7e90ea217f45f0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USUM70952391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbd6172af3fc547475ced296e3898f20875aa78927b36371787cd377a3f0baa. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USUM70952392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9dac19e5cd704810533f571a95b1c9047f9e2c24d9a2110fa599407c6260aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USUM70952393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc842683ac78c060328b4786dd4ac245b4f376b65d35854f2628119f9a4595. 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/USUM70952394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc405e7e36e1b6c998b474a3f8699b51861cc4f99d17aeeeaf8677cbddad877f5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USUM70952395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8b7a4b6f38fe4b93aa0d40697ec1c497fa08fd868404c615f109d86b51e57b. 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/USUM70952396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23cdfd8fd89ee6601aaabd2472b09927ac4a24f3e9ba18cec2d68bf6e979f6. 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/USUM70952397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3989ee8b55b6f6a47f00cb49de734f878c3af79ae3022dddf988f50c929cb34c. 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/USUM70952861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bf76fe658c4d2fb51d7931fbc763f07eb73a6ec9382986c9b4f39dba6677d5. 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/USUM70604252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc762656f54714a6fbe53cef1352f6ed0e489e8fc7d2835a1ff7ade8db0129c8. 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/USUM70604251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a4ac3c00f31cf8a499fb4d5595e7c23cbd96156d327cefc3024d3b54b5b21. 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/USUM70604249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f9eda888b462f490064935b46b75eef8e4dad3c430ff6274430bd2f0dac0df. 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/USUM70604254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978411bf0a0218fabbc877e41f7907493fb48d5d683f5bf16056debfc3e72d4. 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/USUM70604258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38dd7b5b472a350eb134a509a74b76112e4404bbd5a083d4b51689ebdf872c. 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/USUM70604253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fdade14c1513ea6d6dee861170786cc4fa9dc89d1404971810be852adf8d49. 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/USUM70604255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4432bf67e9da69bc60970bdb0affdadead7d328188411f4045194e7fd3ff0e12. 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/USUM70604268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03dc10a02f1e2db0b9bf0ef4632f53c6df873d684c3904a780670a0a2dc3f15. 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/USUM70604257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb603046c718519908c1087fe9a79b1caf94f893cb531c2ac382c6d3bf5aa5fa0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USUM70604250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f235bb9c0a1288224262b81789880c5392eae0d277dfcc62871589edcdfb0e1. 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/USUM70604256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4840fe8652b24e1f755c08ed8c0bca9cb50126fff6bc28a0ffb22483f0f3124. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITG272400954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9bdcca0e45dd045dcdef50cc5abfa035aa34c743c67171fc0c235328892448. 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/ITG271900733.