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 0x36295385a4ade0d8da9cbc899de4b4d0e9ee81de2c17ec5969de01728e44b9bf. 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/bfedfbed-3536-4dc1-a39a-b578bc29a229.json and https://artists.proofprofile.net/proofs/artist/bfedfbed-3536-4dc1-a39a-b578bc29a229.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 0x5b78f37ac966749e9d817014b860d33b78f58b5c88576d4a0f9e2cbba02074c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK1868693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cccfc13c7121bcd18f7301a279e9ef999825adc772e9ea894fe4e24d31d8e0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHT2308517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66992cf3e085add294b1d5ebfee60a8f33d7065f2bba1bb94c7b799130f529fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITSWC2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f0cf2474d61c4709934a0a67672f52c7ae2c0accce3f71e709a2cb88a6a863. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJQ2538157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7206b131b9d8f0b2f19e4cb4c4db116ef4838aa43dd7799187a9801ec194f2e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJQ2538174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa413ffa769e8df74585e3de1a9052bba75cc34d9ce5f6b7bf94aabae33505e56. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAJQ2538204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0498f7512239f461366050e517509b8e991a411cec62f3ea7bb323f1b1f0f64. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAJQ2538260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6f95413af6bc62ed33710a52cd678a9f1b549c9c3b99b67178954933503b1d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJQ2538294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447d4cbad5e083a96d8ef07e02b3a976c0eaa46676c074da00fe52cc7c45c83e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJQ2538331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4a7fa3c00547a1d4c9471e77b4eae53c1c7fe68faf488ba672a25e77399418. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJR2538353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f9638936ef65c2fc228feab502b92430dba48f6e314752ffa24857bde6db77. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJQ2538380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd702f0428e6c49dcde1972339687030e4ed5931d5491620689efd8c4ea9daeae. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJQ2538395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9b2e997def85db7d4a74dd8618817b73e76da011cd2a0cdefb75f1b854f4c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJQ2538401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff77f14790cfbc47342f96596c1bcb95f57d353a01052be0c4a9ea87e8aa088e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJQ2538414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa58585e4a64d7f527fd04cb53655d8024b0f2906d872ca9732c235701d352c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJR2538420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd78933a8d5a60a93e300918b53a6e52ba43a213f6198949ceae8f0aea7841. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJQ2538433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b52a4ac6a4619fb5e121ed6749fc84e702de6bbe57d063358f2cd38d9163851. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAJQ2538442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623c6d2bc852bac3c56fd697b1ca11961f69c300dd45a01643575db9975e9ea8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJQ2538451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04abb390310c482f92d16cbbd80c28850081dabe94a67b26c5ef4394635370b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAJQ2538461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d8126b9c0181477de4f7bdf809599d78ce937dc5877f053629db60e2436c73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJQ2538482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c00f5c8040237e40d2659545c952e704be1b3ec66e0bfd8cc2b6fc67b20da2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJR2538498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f61730f8513d64fe68f7aed8a2fc5ce2840537ad3bc54b93a494cde67f20065. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAJQ2538506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c427d9cc5c5c94d3b43e2db2841eb5351507c089d8e4170f99c62f1a9a6b1f3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJQ2538518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9193d1a6476209b92ef3f41a299bbbec43285c2d800c0a478050a7222e880d69. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJR2538530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d8525b8cb22f70073516ac017014f1efdfd766df271e84a8bbc426641cc0ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJQ2538539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61969bdfcc09f56f46ef20068a29ea32bf24ebf55b7f7755055589bdcd3ff93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJQ2538569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95da15bf14701adb629e0602574b64497bb238ec8f9f953cb8fbfdfdaadf66e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJR2538580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eed587679bb76f6433a375d649ff4d3549efa85f3c1826c771f8b8efca777d. 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/ITK252140005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c3f26f04da5c53df958cc60827752de55109beed460c5eb44c5292babc9ad. 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/ITIYI2400004.