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 0x9ae169361e7948b516c3d964db4d1573fb4c1004600db76ca15cbaeaf7058456. 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/df698a78-3562-4662-80b5-3eb3a921a06e.json and https://artists.proofprofile.net/proofs/artist/df698a78-3562-4662-80b5-3eb3a921a06e.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 0x28664a57306ec7ed49ed5fc19385da4b409631865d7079d4e3bdd527a2f28c11. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAS2173347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205cec521b850e58d14717b374c9edee9b5e13681b6c1b4c6539b4bff1334a6. 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/QZTAS2171972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b348d42534145535a699d90bcbf63f7669c31b719bb068d837d704e52685984. 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/QZTAS2173336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633d36d6839d78e5f2a353486bf59a8150e1e723131389774ba23063fecc0860. 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/QZTAS2174628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7ed409d99caeae20135847b987590c3fd7359a9538e02bb51c67bec3486443. 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/QZTAS2174629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea471104ddd45fbaf972b95eb94120e63818b11b4e534a98f127f1f35dc10f. 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/QZTAS2173340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38925a13601c63c2049cd3ef640a81cca251ccf03fee98484c099acf5b052a2. 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/QZTAS2174627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09675a0d183a8fa2cd8a0c3590131c7a62623abd7ab0790a04779874c78bc9f. 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/QZTBE2467839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373511c5ac18d8a34317da1f6dbbb71dce8c013faec408cb9610cba7afac010e. 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/QZTAX2420326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373511c5ac18d8a34317da1f6dbbb71dce8c013faec408cb9610cba7afac010e. 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/QZTAX2420326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584b7a27781f2886ad5ae1837efee6938f6f89f0c8f4c0a993f2c1383db9d29b. 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/QZTAT2251957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205cec521b850e58d14717b374c9edee9b5e13681b6c1b4c6539b4bff1334a6. 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/QZTAS2171972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b348d42534145535a699d90bcbf63f7669c31b719bb068d837d704e52685984. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAS2173336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebf13aedbb8b18a562778afdc430351798668faf8e7c7c09eeb408da5796781. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA72065267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d9732aa99ec994240ccd4c9f77fc5222bc1ff7b1bd0e8d00f40530fb59997. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN31911100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e361811d8f122abf1a104283406b83576ac6fce00245a92dcc555c88a5493f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:52:25Z), 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/QZES91946819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc04a1b624a7a69ca4578534a7a18f4ac047000d3d453c1dc57a38dbf168e46. 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/QZDA51909879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c75ce51b37d9b00b406de89e3b4bc95decff11a57af87b68c58376ee40f68a. 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/QZES51822397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd151338ccc87100b38f9c33ab4c1564685f4c91905e12507a04a39f039858149. 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/QMPKX1864652.