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 0x2fc54ac9657b3956dd928e16cbd0198e4d3064925e7ad37181e97e2ce3d06864. 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/467aae72-1f80-4fe3-b320-2b0b28f808e7.json and https://artists.proofprofile.net/proofs/artist/467aae72-1f80-4fe3-b320-2b0b28f808e7.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 0xdb97feeb9fef0555bf95c6e75d1f45ab7e073222250b76ef0f8260f1b524ec86. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJW2544514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77917fda7c9085164cbc0792f35353bab79505a793e5a989d98960c6ecccac0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAKA2569713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ddc2ec1096854eaac07ac33fae4005a37bafae04ef1a65f708a80976b669b3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:47Z), 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/TCAJZ2569730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a5e608a74852295b04507255c188d832b33e989cd7e7ea43c3539452c7e538. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:18:59Z), 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/TCAKA2569736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ae6ab2b584260bb3a980acd8a96549b703349eb6b38755f1b1be78ec3555e8. 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/TCAJZ2569742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c25f09b390a549ebb77ad157d024cf0d3a7a1259d82b983c1b1ace0497827. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:18Z), 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/TCAJZ2569747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb987585745f1bc821a1503262722973e1d622260b30048f5a4fd99178092e218. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJZ2569754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d06a37edd1b12b655cab41626a3f66624e2665e31287deaa07d5f1b268ba68d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAKA2569759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea4a281260c24fb6c1a6b3a8861b38ec337a1a3d8a9b38265369d77e219b26e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAKA2569789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe270b7915b05dcc7439ea2552fcacfbcb4076f7df6014e79b01cd429cc7216f4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJZ2569796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2d86e9e47ce02c437a385c7d45af15283e5697081153a8d1a3f5c500f2e0d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJZ2569804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c41384c0167818d7641daf7dd64ce8754c0b01a57fd9220ebddd6234f5b3f0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJZ2569808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0256ccf5e06c23195f0034abccd6207283f4e3c742f2b0bd6d7d6a1fb93ca01. 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/TCAJZ2569816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d99d433777b6e5a177da41a12fbb0639f0fa1e2ddaa8f22b5ee8b2eaf49e75. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:03:22Z), 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/TCAJZ2569819.