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 0xa3a13d623013808c4cd20877960e854858cb36d28a42675eb34338548ab362c6. 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/47f5498a-6db6-43b9-862c-35942bb01d35.json and https://artists.proofprofile.net/proofs/artist/47f5498a-6db6-43b9-862c-35942bb01d35.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 0x03cb0c0f756280ab81340f81574834148195103a8ea4c28b245603423fa3ec62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DELJ82002955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdc2e3917636a45e3f59e947baacb116d2a90aacfc5b81d47a42deaa78878f0. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DELJ82032635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d852594cfd9f5803f8a13c481cef2999652ada5b6230f65232cc46ec8fa462. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DELJ82059979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eebde4d17f55ce7defb39cd53bcc613f5b82c1ec198d6d4f3b0f988a25d620. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DELJ82063877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f1e1c53712e2c5a61728cea77bade0d8f359a28a2000ca98ae90f6745cd15d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZC62047132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94c615f7f39f7dee69993d98bf5583d532aa727ffdfc5d2becea14a0eff24f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DEZC62162659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d0f60d6a5b84cb54e3b57782e10255df7703e20334057a6683eaade27b234. 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/DEZC62196813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e336be0f654cd611c5d877843704fd3fe00c248e89cb068f782778a843db1ce. 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/DEZC62101602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2214d90ca4517e5533fb2ebbbec391ce9d527d68b8903284093de374e4dcf536. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEZC62132161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45e46ada03e0babc42945e3c8c2bcef5ff3078191cbd67e0b0a38a5a471a53e. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/DEZC62136450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cb9b546f51f97502f5e89732a9ffc056044071e3dbb8f9a4175c3392833062. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEQ022280010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0eeaf076f743da1a85c2c0a56fbb124d6d0fe7a866f87006f25d63fdbaacf2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEQ022291059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cb0445b74e75d2642f0c3981f0a2ae385f35095fcd0fd88581096607839e8e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEQ022282550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cb27023fa1c6f8ee6fba53f85eb544b11063d735c72317638d4d6aa4f56c18. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEQ022371382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb92034d20fb35b76dbad4d869b58a8873950036773a73adf513bb98b1205a6f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA082388142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c66f627fa2aefff6e193b4cbd9692cf792d7b71f3e573b71e7ba6d98924365e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR9Z62300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c1f8c0e3c19603ef96eff72f5d8c87f9b005c2a780de8c80b8af10c1e189e. 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/CH7812424217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56c3ce6947cf6fcf2c02dcef09371ca24da2a2a286d10180c5b244e0171c1cd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FR59R2556073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d2d54e4ab94adc8ec052546686a2dc906c297f3f8bddd3d62437149ab59efb. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/FR59R2594081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197f35ab0355409bc375ce573095e28506b5c0844dd821526035c7c365eed5d9. 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/NL1LE2303440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe970321de1adadca5c2c5f774a8e4956acf0f9a0a4b31e13e3cc2861df37d8a. 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/FR9Z62100580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd700f0d92c29ed3a344d70ada944cc6769b765555e31040fb9e6d6fd033af317. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DGA052412935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84208d6d61886086a337be1be1bfe10b3e00faa078382dba2c35df0348483d84. 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/FRX872436864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2241bea1784be396c57b824ea02a84fe925a3fb6b7f6ea30aa2ee3a7e7ef3. 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/FR96X2472166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835f88ab56a66e6e70b926fc03947e81317ecbfc49a3f6efab76008a4f620397. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR96X2472167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08a4bd654b9d40b25c68066119c65feda54136c118a84002815443e9cac5c64. 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/FR96X2472168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d7a52c62c4017f03a7169b425f48284dcbd64b1e26ab919fe9265673fb1555. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR96X2446412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3906a33bcc7a517f019143af68fcbfc52819bf3ce7d61904c2f3cc4157f20f6e. 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/FR96X2436463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a3d91f5cf3340b58e40e8011dc83f319c0549853b1b8047f24f9a04e87f804. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR59R2463705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4065358d0232cb2fa11b8a9152629acc63748f736c757533b0deaa22aae00b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ022200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe970321de1adadca5c2c5f774a8e4956acf0f9a0a4b31e13e3cc2861df37d8a. 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/FR9Z62100580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446876a5691d047f8f0330b64df4504fb8f64e4362d313c89a2a6c6b4ac127e8. 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/UKZGC2406286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f36732b5efc6eb078e2342b093d4fb104e125cc0fbcf9cc4d3ed26e65bc534. 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/UKZGC2406300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197f35ab0355409bc375ce573095e28506b5c0844dd821526035c7c365eed5d9. 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/NL1LE2303440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b44e2763b52661edfdfea5a4aa54fbde48e7ddf8c3123e147d20dd07b9981. 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/DGA0Q2398337.