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 0x82366aa1275dbde2db056ed7d182710b1f62e02c6a20ebe0b120706bbf6080ff. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d778a53b-6ef8-4616-955a-291d0c459356.json and https://artists.proofprofile.net/proofs/artist/d778a53b-6ef8-4616-955a-291d0c459356.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 0xcb9f6fd9709066bacf1bb1334a39bc0dc795834e2619422b561bc2889c295923. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA82570501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a14a608b5ef8a64f1bc61f54e516d10e7598a71b621d6e72e5692a61c6ad1d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA82570502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d2137068436c8104871326f111026600ead3d210a08c8cc640d84ccdda959. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:07:38Z), 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/QZDA82570499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedce6ac1b77c00600bf0782f18e7c6aa0b909c504cff7be147cd9e5e80024cc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:00:54Z), 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/QZDA82570474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a462eb4a9e69beef82d6eb5ee6e96b4da4c480ca69e8fc8439f198e6d7085e8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:04:05Z), 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/QZDA82570529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe879ffd046a73844db8c33d39af6e5c9b06c21253948450939866375bf909e59. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA82570530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df9153024d7126df075f3a0f6ee1081ad429f9e95ccae95c113769e72f0cf69. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:02:09Z), 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/QZDA82570503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5354475da31090b541a6223fda781f6f5d46c3feda663ff3bd736be91705a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:55:18Z), 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/QZDA82570498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90b5083d479bec13d1cad8961872596d0a7924c09b913b014c4b3cffbe313c4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZDA82570506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e57d30a0d96fb1d6883fe3ca2bdd2c38f824e5afeb00bccd8b49145c15139a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:29Z), 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/QZDA82570497.