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 0xf4783931bc26fcdae307d3815a5668cd7a310f7f3dde5478c96ded804297dcf5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8f624c2-cd01-497a-9363-000de18505da.json and https://artists.proofprofile.net/proofs/artist/a8f624c2-cd01-497a-9363-000de18505da.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 0x4891d418a88dc4168a6201bcace68a2ac6bb8ed127876fef9e2afa8b03a92c81. 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/QZTB72290170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7091fe166679604d25696cb548a41c980b564ee3d8ccea708e07f6791558c7a5. 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/QZTB72290172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd663f54114cbf661263dc741bca164195d42f14909a7b5501b0d337ea01dc497. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTB72290173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02028698290ee4dabf96d4ba361339e1b69022c7accebd18d68ec994d67e81e. 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/QZTB72290174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d309890dc5e774330f9c9caf0cd65f3175700ff009353758fefac099d3d4a9. 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/QZTB72290175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c1b7198b3098d1ce13e17a20c13122b173b1195fae6bb1901f2a650ab5693a. 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/QZTB72290176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0115ddf1dd6bf936bece9333512a99c669b6a793abf9da41784ba8673c919eaa. 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/QZTB72290178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce858a87ae26d4bfd11f8b2624b1c46667d71a73f4f55999f65637a4b61fd13. 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/QZTB72290179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e5ff5b47dec62dc9badec82e9a753631e709550b55c7265aca7a12a6199350. 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/QZTB72290180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38783eca32248a89c7341f3ff4daf183009662a72faef137eeb4e37fbdd9fb2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB72290181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aeb7d9c49d939043059a385eec0523f523917266d57b1e7e95c1246842b7d4. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZTB72290183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfb8fe0b58ccd99d307d4e0b729478444190bc721b07e3af8c54f493e150994. 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/QZTB72290184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05df196071c7ffe6c94623d8ce7b9aee21155dd87aa98ff3660ea54594d0823. 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/QZTB72290188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7b920fcf08a65cf8ff1429b3215719e3666e19cc420c1ed74e5aedc67bbf91. 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/QZTB72290191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bb150a6ef61636d184b0b6fef9af0c649d4198beb2d42416dbe1adcd1d8d1c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:59:55Z), 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/QZTB72290190.
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 0x326cff28d9e233d4268344cde95271ebe2c032378362b1b8825b495acc001e55. 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/QZTB72290169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a03e5c47599242c08dead7e679c2978899a1ef8eb6a9dd5db67b6a786fdb0f. 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/QZTB72290171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb810fbec1d1f3feeb0a17f181a59cc16fa32d85c8ea61859a77a6a22d3f761. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTB72290177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c7d8f6a0f859e514d7b693640d2fee0dcd7a669153a9a3746da89d55cc7251. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTB72290182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199354810c61ce66d9dd728102b39ad5f067309f20af86e315493eb8e4662bba. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTB72290185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df1c8e5541ee10938e9defd38cb82717c1f8a1ba432d775f69ea5225e27d56f. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZTB72290186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a60d1d5e55e77f51c5e1681dc23e8d7570affd2fa4cd24bd34c6c6f76a56d52. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTB72290187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eef6fe385fed56e8b5b659c7dcd33927d38b243b1e61ebdde6e0fcadc8fb1b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTB72290189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c47a6bbce736838f7adfb332fb04a952820e771494be6ac154a2ee390afedbe. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTB72290192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12279638a3bee83017cffa6f0558979292bde636a9e4cd6e859f5301e8929c16. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZTB72290193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab6c0f54b8f0e13982c6729dc78cd4b718f41d6a64bf938cd2c5a469df790aa. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTB72290194.