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 0xa58673d70a28eba84052c6de15475eff306a5ed127af8190d7cd2a2ef46752ae. 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/f472e98e-db83-445a-9527-ae4bf31a609e.json and https://artists.proofprofile.net/proofs/artist/f472e98e-db83-445a-9527-ae4bf31a609e.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 0x546856f46985190a9da3092a8724773edd169ef400262dae9fac7ed33d404a75. 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/ITG271900556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aea1631488e205a88f4631b46c9c92f02890e780032f8208c5d2efa0d6d2d54. 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/ITG271900557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cb1c55989e1442b056879962dabc72b318a7a2a83b26a3ce6a1a51c9683671. 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/ITG271900558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7397d92008029e5015c20707996e36b09b05fb5411f86345b13429b41bb7fe7a. 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/ITG271900559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f25ae207434be6b51352eda80d0920a23ad01149ae8545195f57f63757b87. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ITG271900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23945b0be318c8b018ce92e319ed2d879cb1e9f2328b6fc6468f51c9035b8e1. 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/ITG271900561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c20f2c88fd72a9766ef6a5fce66fa90db76d0a09012ef69702e189e5d215c. 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/ITG271900562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80bd94ec4f2d69d808a0e43b292351346025f14b350c3b2915574aea59e7701. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITG271900563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc233f451806c9ce761716555d674d44a98d6f5ae107b7dd8476baca1033f52. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ITG271900564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2bb0cea1e8a8d1d9412e022ddaf5131b6984fe5d3242ea445e7c24af0f2718. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/DEZ141500422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabad7ffafb6d8614079ae90285210de9ecb6882f85910821f148051378a1ac5c. 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/DEZ141500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035eb419d18ad5a692c2f53fe17e3ef8d365174ead3b5786bae38a76143cd806. 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/DEZ141500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0359459aa1dd3e2da64f3600ef0693725b5f1ec7e75e2e62f625d53f6321f931. 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/DEZ141500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ec5d94a7b35f736fbf97f802dbacfae51dc839712d65c280e8cd72bb92965. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEZ141500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c02274b96665eb47cc71f6ed6f7d0a4c3bb34035b49e8b00b3fa7eccfd2a326. 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/DEZ141500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002f4c67bcb34406189e19b5f8fbe404e6d9175c04753c6c10103d8f90958bad. 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/DEZ141500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d89bfb2587a310cc545a280699f14f3be3b3faa8384990ccd84c592179ab28a. 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/DEZ141500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b89a846e5d26b0e98d4472b24c60fa26adbe0bfcc4aa50963598d2e69af74a. 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/DEZ141500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7397d92008029e5015c20707996e36b09b05fb5411f86345b13429b41bb7fe7a. 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/ITG271900559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cb1c55989e1442b056879962dabc72b318a7a2a83b26a3ce6a1a51c9683671. 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/ITG271900558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aea1631488e205a88f4631b46c9c92f02890e780032f8208c5d2efa0d6d2d54. 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/ITG271900557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe740dbd257828808b1219d02c955cd268c7d3286e8f3cf82a38044dedbf02e0a. 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/CH6540882803.