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 0xdffc99fb6d96bea5358fe680910227c2a9cf75d9ae22eb4f57980ab2143e0672. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54370b83-0d02-4d39-a3f2-f5e8946e156f.json and https://artists.proofprofile.net/proofs/artist/54370b83-0d02-4d39-a3f2-f5e8946e156f.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 0x13cf5b37b6109194614cec4199ae8d7fee6b4855f9c0281210d21c7e0faa7877. 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/QT3FG2508509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b9abad208d2459dada33c3249e63230b298e685bcf194fbcf77373202335e1. 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/QT3FG2529239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df887f1c68281d2c5140c71159c03001349515d5215fc38025407f5f3f96cd8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:47Z), 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/QT3FG2529242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8901f035bb4fbe5631a4bfc44a8418c84f916457f19de0cd8dcdf300b491d789. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3FG2529251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a00235ee58b5046700546d20613d7d2948be850abaa56001f2385f7257dcd9e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT6E52548762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7285eaf86e1d55fff78b9298ba38fcb7efb3cec664417b58d39cb6c82b9604c. 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/QT3FH2557476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e353343f3e445b2d26ff641bdcc24344eb1d05d7ba25cc7418045312bb24e4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:30Z), 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/QT6E52545900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa141f5897ad2bc4e40c38708a9bdaa1d82fb54a68b62d6151408919eaa6539. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:39:44Z), 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/QT6E52525137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7215bba9a29952d8b108b1c5dbf2889010572f47512609e82d7cfe545f1b95. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT6E52551119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bea84d75013789e8043723e92e633711c369fb058201fe0e2b737e8c148602. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT6E52586150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00e90851f76a7ac71e02920e7515e0fd888a2dc68164892387ba38b80ec9941. 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/QT6E52595622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d022f7d73875fa050475ef60e1ff4c0a432e306c28a052ff717f9951dea509. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT6E52586164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949524f921ec15d39e1b3064a5ca5ddc2f3b7de3409483a65b8c3646cc69881d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT6E52597305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26af24ac67fa9b0041900204ebec2699de03118ab1de85346c8f3774edbe88c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT6E52586166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57924cd069e6f8a46cf3a05cf8af94345f225c87e09884fe42ecc097d3b2a32a. 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/QT6E52586149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4513189b177c806d75fabec4405252df8f08b4186a69ca125c30f5ae79aeb72c. 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/QT6E52586151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc80c17b5aa7299aece13fc32076a5a384e3249ea7997834474dede78f038de. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:34:07Z), 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/QT6E52597294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe144fbab2978700af4d3ef5ef1667591dda7074b9f5091573642f9978e991df6. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT6E52597306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e2d82feb249ca4fbddde6bab2ef65a66f48ce336497f0cf9cda390ed04b4d. 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/QT6E62533258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72712712217f52db398d0536b9b8a123626af8fa692c5f2654463c5dab213a9. 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/QT6E62540899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebad7a2d35b0faa1cfbbbeb55a0b55ed766d9ed420321e94a3f1ae06bb58e982. 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/QT6E62533036.