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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e523ed14784fa165868f113ba32cbc34239dfafd87208fdd59f0f38a6b9209. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb39326c-997b-4529-a37d-3e775670e58f.json and https://artists.proofprofile.net/proofs/artist/fb39326c-997b-4529-a37d-3e775670e58f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c31c0c72a7c2b2aeca6490b99297c9d6cec62315115cce2a340984294baf73. 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/CA5KR2408066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b95b37403438c68818f5f3108dc7f3c4c0822cbafefabd7c5d5c2ccaae861f. 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/CA5KR2399649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff72a1b23432518bbd1ff3ae0b3687c0fd25af57f1f75341b69d467af38da9. 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/CA5KR2408067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6022e9e43b55c4699e270ed4a53297dd4fb54e840090baf535309bfc2fc88ac9. 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/CA5KR2408068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95664e47a92ead65b6c7f6a6dc9d4ee2897bd53b2c5e67ac11539d26a3f8e6ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2408052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f28c4b6dbc4a318f01ecb28f0a13bef8b2a898eefad6370aa2741385286a86a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2411307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef72d582aefe92ad30722fde223068799c0b2f51e0d5c88beedaa563b37253c. 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/CA5KR2408069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e22bbbd45da5e43ed157898184e2aed7e8b060433399925c0f18df06ebcc812. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2408070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653896f7b26b0a690fe05c7cf072e70442b04bdace965b7b5884080a080eee02. 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/CA5KR2403596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd67bf5ba329ce69610b0ffe969b220d0038c565f1f2404d3643afd2f207c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2411308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b14b58b8fce2572f073fcbaeb43344d34974ce3bc75785d33b11697a1299435. 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/QZTB62206215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1b97b224f16a09b8d3bcb0467e615da10077838ac2300047df8d52e51f4621. 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/QZTB62206216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0275f2e40bce959d3d3c6b30b64e010f1ddc688f2a421ebc4a14d96ce2fcd7c7. 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/QZTB62206217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5509a92a16e912160eb929c327fa124941d1dceb804547925999b903e1faa7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:47:48Z), 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/QZTB62206218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b81f966ae32b668c42008e06e092275dd2c06dd52dc8cb66097f9f64d7582c4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB62206219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501f55363f2ddf68f89918754bb8638def15848d02a18f22f33646929472fb20. 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/QZTB62206220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c91fcb2dd27f115cfe0d0b5a6ac7fc158285dda31f71e14369087583117d6. 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/QZTB62206221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef5bdd4c72214a040f49427436fa4956d8ee21c9786837b7677b001441c304. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB62206223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40bb482e747aa1ef591da9faad1b7d4792617dfd0f5307676b95afb0178ef8a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB62206224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a271d9271d14af0059b29f2b1b18544f2b34ef76fe10a834c395a4cdfa86eb. 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/QZTB62206225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b5c960b1a7d7d2fca91e4d906ae20295744121be006a0e8ce01fbb41afcf9c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTB62206222.
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 0x4f1f0a1e9ad33199e71f88e9f10c2b116334a4db0fa5be25c32d51ce69a432f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAGOO2146757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a64b235a17c2013da30643d86c0546f2fe575558e63639a7000bd65235d23. 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/CAGOO2146758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0990709b928b1383d7fc0f2a398aadf2774f8a38f98fb43228542c4267d9d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAGOO2146759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c73ff7b824ac69669e8ae51e78ca8a286206792ab01478960899e98acabdf7a. 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/CAGOO2146762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4410a481381e876aa582c939d7adef596478eba626e377d1adba86a24e80a38. 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/CAGOO2153674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ebe324d6f8718ef10f8c853102d7fc834b35e6887c329a17512fcc8c0ab28f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAGOO2146765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fa328a3f02c03f49c4ee6996d12912294124e6a2053be7886b7c15fe016ef3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAGOO2146755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc62770dd2c84e05710f89e958dcdcb75c3fbaa9bba8a58a9ec6864dc36e8b4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CAGOO2153675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b5f8dcbc753e7e36abacc7f485db725d5ac44f3641c6955d28308bf2fa794. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CAGOO2146764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdec2f66630e59130a68c27f4324a245363f548d465b52eb66629bd7653ca019. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CAGOO2146766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ee688f46f81a277a6406942b9fe0d7c532ccbf09db2b13cfffc975266c4c4. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:36:11Z), 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/QZES82367688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf205f4bb50f83ed0a9bf7d201fedb49595ed468121718e97c4858f0cf7068638. 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/QZES82367689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dc02d4f41970286ea37822f4dbac45d638df6d53cd2667a4e270f3dc8a593e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82367691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6502d1c97861c2e19434591b3c20f87be5e4fb3bb6cb494b2e39d960240937. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZES82367690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaa0cefdc38873e6f728196e6f7c3060b179d0d412c5868f25f94ef60b620ba. 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/QZTB32230384.