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 0x19a739ed83c8076b0f6a054d828cb1c4611009f25b05dc6beeb4d22588088e3a. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2acf7764-00b0-4af3-af19-3041180e5d45.json and https://artists.proofprofile.net/proofs/artist/2acf7764-00b0-4af3-af19-3041180e5d45.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 0x03cc629cd5b51c6e7734f9049482b0750db345a267615c3d853993599fde9c2e. 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/FR2X42158541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bf8ce4e58aa485750938bf166dc63b1e80fc8d3647b34784653ff726161a6. 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/FR2X42158545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2748538205131fb796f4a27e4a06ddd92fff7d1887ae606b25755ec02fde2a03. 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/FRX202229810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e550c05c74136b34b1b0ea0627cc653adf163a0374ff6bc1dca81aaa2c9831. 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/DGA062312731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56879000f3f18c4a2e0374d84b6190b87c7c740fee6828a5248fd7c2fa794f04. 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/DGA062312732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c72d037cbc3a39399d839f5e8338ec60d6086485e6ed4088ec351a95399776. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DGA062312733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5332b0bff0a0a4cdb885bcee25726ec78b65e8175f1e94b00bd6a9c5eccabb4b. 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/DGA062312734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ef4383d6e73dbd9173301394462381a750ab04d068d40125f6c8cc1ecb8e27. 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/DGA062312184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd2e2f4132599e9421d66c844265e72520d8838d34c750f0244e813d3b1cea. 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/DGA062312185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef00363bc01bf2c150794e751ec965a857ab17712e0ffdbbe454c1b209a3ed94. 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/DGA062312187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0599e57d644abf4bcfb55e1aad70b319209c9d1ba9f7e0810620e2bcb282ac7. 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/DGA062312189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8d6ebd7a328dd515e828503c0cd19e125c44b933822adb628bf63b052c691d. 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/DGA062313886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23060a756c3efc0411b45e0b9454f1170ce3705015d3fd787ab30efe04aa1820. 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/DGA062313890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9b713445c6c960fddb30402c1f097f41efc14ff77da78e494c34e1065911bc. 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/DGA062313892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31922c132ad5f7cd47095a1451629b88cd6adf3a80b3a51f0dff10116cda859d. 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/DGA062318504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe138bf232ee28aa28abb2f57a0bb410a008e7dd07507d5e1f55d4376007c1677. 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/DGA062318505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630dd243bf219e2a00cd00af1925a1f609e1c7b7962425ff744d4ee8f6be44a. 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/DGA062318510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6637a1e0dc52ca30a43510a37d0d8bdf6c50d91c9349a7dfe8595cef93ed10f. 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/DGA062316572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3696b23fe7e4d4c75f6fb793e02a4ebe2d680096fa63e2fa795a027d3a05beb. 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/DGA062332559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0358fce811aa2a6e5e16bd7c60b667fe62e0920b66cb20e0ea6a33db78c39b. 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/DGA062332562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da1e8d3d6583a4f96a1e1392ae4d4ecbc3e7ef2e418f3cf6f68a5a11141e3ac. 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/DGA062332563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab244ba9f10b6ae348083457d534bddf89bb8e02f358ef9caebae27054f96d6. 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/DGA062332564.