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 0x18560589a7c29809a7747b05204cb6c9418fec6b03617e5f142ddb2fcff728bd. 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/20563a98-b899-4a31-9fb3-f7629f404697.json and https://artists.proofprofile.net/proofs/artist/20563a98-b899-4a31-9fb3-f7629f404697.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 0xcc468085f3011507379356095d5d5f5f2031be6e6f36162ada6057ebcd7822c2. 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/AUXJM1900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f3df4d6d62117cf7b8d2110bdad691b734995c1e49feb61dba6440b55bd0aa. 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/AUXJM1900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611d604c34526065c0085d4af9c6eec49aebccfdfebad5db72bd2312352e3bc6. 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/AUXJM1900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3830f345b8f348017a8232d75b14a01e36ce8b071dfb6e465e7d1b94369057ed. 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/AUXJM1900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e69f15311c3cf3f4c7e58d0e367d1882934fdf5ba2422708f47512741de3a1. 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/AUXJM1900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e14da77332d1ce53bd5d23b80b74d752af1abe639b1da3783c4ef50af9bea. 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/AUXJM1900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc285620d1ead542258d7a18dfa14568cb234ce222306e8f9e2e397a633c4c5. 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/AUXJM1900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb178037c47cdea1ba70970d27c79f9d29bc297e0c41baf161134a75d82d50436. 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/AUXJM1900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26772503d151c1548569e6367a97f3edce3fb989056378da1dee0e2d474c66ce. 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/AUXJM1900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9ee7dab23ef94cee70a15c8a93d07a0bb8ef2db0ceaf2098e2071fd824842f. 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/AUNV02200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0486c6d1ac3e9c1ea71063f1b9b58c2fc75ca7b02dd1da7e8e1e0d4336f0977. 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/AUNV02200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c67f7c1f62d299380443060f418ba3c89247420909c442890deb6e44e5a593d. 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/AUNV02100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24dc5e149f01e12f7cbe1c57b75af70e30a08977ff6f53feb836e856201412c. 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/AUNV02100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f6ff41709c95f4499cc7d60b1ff468a397225184b4133eb26225a7129fe54. 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/AUNV02100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db1235a2fdd0a8b9542d8382e5a815f97f5aeaee5988510cdbabd455f08dcfa. 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/AUNV02100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de41b70509614888657e725db190d41d5b34e1aaf629855e7e11f4dfde0d697. 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/AUNV02100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7d24c8668c89317a07e3af601b3cfb36d401d6dca50ae886e108744fc3862. 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/AUNV02100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb48a22079c5f05d883a7a7deb73c3e2209c37e938d66dc89037652a63367d1c. 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/AUNV02100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaff9cb13f2937ef5c98d57a43d0a55a9e719b199bb59395f5d1a460a7b6c598. 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/AUXJM1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b59084da95dd68c2a6d5c102da5c2736986c7dad9fe2f93742f7e9ba3d569a. 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/AUXJM1900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1966516f8821852400ec984c4dfe74ce90e0b528af9561f8656765540c2eacc7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZ93L2120424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bc634750cc580e74d74d8abc8766165b3fec051f6a9da436f71ae2f389e087. 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/QZ93L2132336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c641c1ee78357f8ac19b3f40ad2bb6b1633458694b71092637c88904ee613c5. 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/QZ93L2200448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5573bb4a848b23193b27436117b5de79a5504ec0bf61d3ee0dace8d392f5a3. 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/QZ93L2124854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d82df035e7eebdd176357cb4c29b0aae69e0386fdc818eb577ee5b7ad6ca88. 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/QZ93L2107269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba7806b860f331aaf4f74a79707f405d4aeefc538f0d8ae94a9115a65808fe0. 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/QZ93L2125445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9e2bd8cf4ea8c0a3d5dbee2119625b7f848751fbee96bf6611c52b69e0a0f0. 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/QZ93L2200449.