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 0x4cbccbeb5efe788f068d1ed01f053fb1ea31906c06e61330ad32419f2d05c37f. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac06e1b8-fc52-4b20-8a63-415f2e302b00.json and https://artists.proofprofile.net/proofs/artist/ac06e1b8-fc52-4b20-8a63-415f2e302b00.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 0x1aa742942d5d2ab8fa716563d21e4055052af87e4199959fdd6273a72d45743b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN52530320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf27c2a60f101949122579b630290ca3b7cd0f41967462fa8a9ee1184e0c1d4. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZHN52530318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b700cb26d3f835d66bc3ff53cbea9d1848ce68579e33404fee07a9d1be7758. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN52530314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093eda05eb367db7a33dffc4c0cbce25b472ef3ee3a666c068fe66effeaf87bf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:52:01Z), 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/QZHN52530325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24b6b3857a2542bfe9d5862297f1d3b84eb49f581654c8a2a7c34d724c62ad0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN52530315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e328d0b3987d552bc08b010b52cb79e35eed200f326f9dd99681384d7ca1b0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN52542931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6803fd8245e89cd8b6e78ac40c69a0b5d173883ccfee496604dddcd840741f0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN52543883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2502f7397baa86eed37ea15b8f3d561556fb7a263c7da5e36eeee66dbcb63d81. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN52543870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b92702286cec9beb505bf166cb793cb131761ba2aac2e1325890710423da2b2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:53:23Z), 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/QZHN52543886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c5d263a00d2c58ec4439ace2b3e41e4aee3980039f97b432b83fc77457058. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN52543887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d8ba07946683432faeca45c2e806354e4f729aca1086de63418407a325db41. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:57:03Z), 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/QZHN52541096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21b189246fa16953600b33aa7ac37fe0a446c432bad38904d85c4335b20aa50. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2583009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea983a6598d0c2a2a32b27034877660a3c5bc3d68cfddcbdb13d5db0dfa83fc. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6M2582996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376ff5728aae2614debc47153645888b2bc13e9080067f5b5843df5814b198cc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2581717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb1e1306a19b20f62e8bbe1c96c7fe6c7d55f9bed6657b594ebf26a6394d31f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6M2583011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924780897a5c7099f4eeb57b6a698d4600b9d95c39b3abc3995ed9ea93d999d4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2582995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1922624c899d925543cd43717b676e039e027274fec658a606b5683f4ee50e4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6M2583005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78058a78c14a59a2dab817292e5314eac8a31dd7e85f1ff2f3f4d9a128d72487. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6H2586205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae1ffa8115c0d7c7006dc326e91644024400206d58d0b83e6fa314f796c5e4e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6H2587952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a6169dbf9c5e05e0f251cc049241593a96a4e6eedf91600bbf09220025b7f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6H2587961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bd957980920aa9dbe4e4a1936c8bb7c81458c1b66c598586f3bf8d8f0aacfa. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6H2587960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b250a3d94940e3ea03ed5ce2aa5fcf9b69cc0be37346bd7c29650812c61dca. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6H2587959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eb65d7dd089d7f842570a796e791a4b0f5672ded20509ad9040187e0c57f2c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:53:38Z), 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/QZK6H2587957.