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 0x7ca4e32b35920f9b6a7571d79c0088ac5993f91faab73f284451383786c2510c. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0159c553-4fd7-49b7-9f9a-68ea25d25504.json and https://artists.proofprofile.net/proofs/artist/0159c553-4fd7-49b7-9f9a-68ea25d25504.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stuttgart Fans - Die Sammlung I (VFBS Fangesänge) 2nd Edition
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 0x05cef13e5dc6a4421753f8168aa28f506c0b7224a848bde894688df93200d26f. 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/GBSMU2100621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b48724ca16b1c305341437272517b6da5238f097458420f9d72ebde3113c4c4. 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/GBSMU2100623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08bd2935189e6a363e820b8d4630f9dc678fbe61877c4099c7f8a66a526cbd8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:56:00Z), 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/GBSMU2100651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524db5a769a57e57017a5c48a32382e870551e7dfd5d771258089e0bb20c54d9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBSMU2100696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f2b1f7add20aa4106ae2c35e4fe8df7d7e41b9f0895e434da17378d703be2d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBSMU8143825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1805c6c3b2799a6cbfac011bffd80dd5d8e7aa10b57062e280722317e29289. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU8143826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d398f0ed44bfc434df3214939517a338ddbe62bb561da0ae6402ed45c698490. 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/GBSMU8143829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba34521d7b0199495f2d6fabae277d590f829db3543d7068784e34716f086ba. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GBSMU8143836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151768cc935669aec862dc74c62415da816c0c7f12c957fd0b19efaba2a80012. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU8143874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03731e8148dd213239850c5ef44c4daebc58e5d0dc45851b146e48c9b8105b5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU8143878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f187c4376b0117ee2836a7c5b537576e266fde67e99467429e472dfe502ce9b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBSMU8143879.