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 0xdc9a37c65a14167218174b1516c44bbc585cf8851518d1466637ed5d2c9863a4. 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/9ae9cb63-e126-4c7a-aafd-81e1b2f8318a.json and https://artists.proofprofile.net/proofs/artist/9ae9cb63-e126-4c7a-aafd-81e1b2f8318a.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 0x99fd0e977dcb5bc8ff385a9315b4227d92d32e3fb2dae189b3960be3300b6c69. 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/USDXS2200730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f146157e0eb4d6a4463f149548f32d51a0c6f54b6c937cec60a7ffea60a639. 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/USDXS2101886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ffbd3e9834d6c69ba88e43cc3af0f48a10f6d0ecad7cf19b3da7d55038e905. 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/USDXS2302265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afb027046b9b6b61e624c438bdf2f3d7d62aa4155369929ea7f745093f4ae97. 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/USDXS2203515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378f37e6810e53c2e8e83550f98d711377a379d755d010e104a8f1c60fa4f25b. 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/ZZOPM2225579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d416ab0f12e923a21f35c3d72ce11f39c12850f30a8ad3becc3a80d8d98f3. 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/BK4DA2401999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f9c4315fb03ce9cea930b4011e23c4e07a4c8c91202cbca4bae0fdc2246f3. 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/QZW9M2364540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc24951a68186a909c085faa06097be5f8bcab434250360be41765b4ab26fc7. 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/QMFMG2330395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dfbdccd8328f8858dfd51c496f7198436a0c3318eca1c024d8ae2053d8f58f. 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/BK4DA2321051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17b6c9440537b7852febe62cde5b37c50c064d48933f3aee4a4b6ced13bc785. 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/QMFME2354071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff12fcb63df1c66a83cdff0beae3248b76f37e5182a84dad98470096e78b8a9. 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/USWL12300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adb809893097a9621338941bd2fda64b9c906544b0323b4fd02f501b94e4c75. 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/USWL12201547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdeaad1b4bcff4f66b89ebbaa8f9f30ff2f8b5a28445f6589e10c3a3a48ff7f. 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/USDXS2101887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef21d0e9669b9c0936f2911efc6ebbc487bd43bdda88a320d77469a92fec0a. 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/BK4DA2413794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64aea7b494fea1608c8a670d21b1c07363717d019277768c338209601f0b85. 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/BK4DA2411738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5c3bd29a3faf8f046a5ee7fd127f91bcf728134c9d9e9f75ca4d93df8448b3. 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/BK4DA2410992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0156671d5d9d7556dd50375fad1d8a621de2b44357b60ca38a044580405fcd9. 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/BK4DA2407487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9198d1c97a25c762e0f1aa3a76a7bc68d3c7bdc30a042a9f0f1057354a29c5. 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/QM6N22230150.