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 0x7a58931638bdcbf78c563dbfc9aa2b55a7a7793a3393a0c81e9d117501cf84e5. 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/ed2356a5-9f4b-4fd0-bb6d-f841b95b3fee.json and https://artists.proofprofile.net/proofs/artist/ed2356a5-9f4b-4fd0-bb6d-f841b95b3fee.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 0x5aca472653dacee74ec655670ca1e8873f20cfdbb5fb9489293a68518cd09a44. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NL1LE2000475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa579818f653d707a280fb3b0839d700eda801f9e77b46c13bfcfc152bb2bc62d. 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/NL1LE2303292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e549e3814eb9001ea28f59bd0cfa0b4e3ad8af624589d074823f3233cb39e6a. 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/GBKQU1916719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ef74022d18967f568c1dfe7965f836385f9ff2d7cd8ec8569d90cd0a397e18. 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/USANG2428542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6532932f999c4cd8100c32c49ce8f9c8c8878686f81d3175a733af500d535. 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/QM24S1916918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15da953545c1b6a9ca894848e3b51acfd4bce3ad5c194e7a7e14a90282c77b6. 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/NL1LE2302868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ae0d8d5eddfcebfa2c42f82af5d4cedd029460feaad7e1e0bdbf94c31dfb76. 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/NL1LE2202586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0dd6fa53b0d1154a362e77dafb3cdaba5f8ef0830c2fe7adb03c86b49aaee2. 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/TCAEN1970768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd6ab08f5fb70defc3fde32f9df8e5b98b46b4265de13799a05c52a356d502f. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/CA5KR2285646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd6ab08f5fb70defc3fde32f9df8e5b98b46b4265de13799a05c52a356d502f. 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/CA5KR2285646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1f7f9feda0b853c711dbd794ad8a63689634e9eacfc5248ca67ba5002f7f4. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/CA5KR2004711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d15f187630729b21313aafbfe633d9e857b46898b7fd7acffe7966f4107d16. 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/TCAEZ2059110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab75a432be86903433aebb0134b0e4efb1613b74bd6d9ca426a517006ea1cde3. 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/TCAES2036460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38def0fa6979f2b004a9ca529ea51f68c797c21c6dc569b215688e52680dcb1b. 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/USANG2072761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa723252c856b6fd2817631f936daf356acf1ae0491e644e0678ad81863b64. 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/GBKQU1978835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242c9142994c4987ba5714101906ad94494277736dd451074da947862e6b0373. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLV61802827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fac714007964f977465fa6fb866ea8b8a2369542db9f233ce5283dd7f05239a. 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/US3DF2121616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8c6ac81020f8c02bc1a703c1f615ada0f5ed3b61cac8ad1b44c47c9fc9a7f1. 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/US3DF2121625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a4fd473aa94a18e66197c4b551ab8c5a20cdabd6d2528a4e2140b2a3f7dd5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2121632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fa68a55a9ec80c123e3a24239c22c88f877154a34746deac43533a738b32b8. 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/GBKQU2101978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57751625f50aded41537adc0c03780198621db20b6b31fba9553b76a77bfb0e6. 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/GBKQU1968709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e1f403639e4b1738f4ebcb3376c14c1643e5fd04d2d79533781e15a83d45c. 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/GBKQU1968710.