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 0xe4f5eea2f39d71868bd56f88d10d911e0671d7753e2f1fabe174b4426581cf83. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07f9d4bf-5327-4154-9e11-57827fafac5e.json and https://artists.proofprofile.net/proofs/artist/07f9d4bf-5327-4154-9e11-57827fafac5e.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 0x5995ae8b9bf2dcbcea89f2636506f409b63eff2301448020b947968f226af169. 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/NO45M1501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774f940cc5ed85bc0591fd2a67410f04e2a859d85c4f0a02c31eb89fa9306d6c. 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/NO45M1501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe370a84c3f258acdf1fa3c68e7ba9996c33cf450f0b44a765271516d3f3dea25. 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/NO45M1501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c46cec9414cb48af339e6f9cc3e1a0f623013a6352e6242eee05938ed27d61. 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/NO45M1501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06344bffaee5f57ee2fd5fa2ffa085695ab317445e47f15d83fa81b86edfa675. 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/NO45M1501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e37857ec9d07ccef01cb283ba224b5a336ae218ba859b33b6a54415a1954347. 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/NO45M1501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce95ad9fe1f13381f109dda7b4620f35c8ced1e65c7f7705431ee4cc69bcf47. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NO45M1501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4471fcdb439835378359530ce628a90b0cf81757eb392f996875cee8ef5614. 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/NO45M1501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40583d453a150f97da9d7c1dbe18e67001befc7874c67dd90e53375e80bffee2. 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/NO45M1501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd40f065a073844401f3bea83fc9f861a632f6243ac4088d3284b51fbc08a1a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NO45M1501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1fc68a30bfa21de3eb8a96162981b8e7e36008cbf5ead7fb33d169dfba4890. 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/NO45M1501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7342cc1231ab57ed6d001f852c7033afc927720d1917e6fc9ae47ab8e10fcda. 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/NO45M1501120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed5240d6493f2a87d0aefb3b7761182c66286d8fc6856804ee9f9a4484d9749. 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/QM4TW1959360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1a4bf9317a7cbdd198323ba5ba41c5d9cf685d94921cf278a48c705e717765. 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/QM4TW1959359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34b06fc6a1bfb15c444fc95cec025f790dc3f804b3fc8c1131cca0eacd3888b. 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/QM4TW1959358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd223fe62b4dc56fa445bf7a6a7739237161fd3f204dae0183cc74577c6efe1. 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/QM4TW1959357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097c2a230c0e70c93f91ef230da57c458674fc3c08f5f359a17f700d4116e9d. 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/QM4TW1959356.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7020deb153da4122ecc3f6ceba983697fdeb607feed995305795109c3119491. 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/QM4TW1959355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012bc072a31b0d264b41a225148231a084112b7d9a4ea222985931f4c1cf9e33. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TW1959354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dccda1d6c3a337b173bdd4720706aeb500cfdd32dd9af59801be5d3194e1e49. 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/QM4TW1959353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745f802882a21aad0d1f6f9cde477bf45f133cec1b8898c7e249f0bc8968cec9. 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/QM4TW1959352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9eb91d29db9ad365924c3f98d1d2b552b3490149016dbe27f3a074f013cff2. 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/QM4TW1959350.