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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538ecdccfd3606f70e6dc6f55b8f1f02a61ad249dadaa3849a4391faa8f0ed2b. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e40adbb-0752-494e-bed6-e98b616a7091.json and https://artists.proofprofile.net/proofs/artist/3e40adbb-0752-494e-bed6-e98b616a7091.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2247efa9016d723da3681d35044c5ab19b1369f9de2242539aa5d2a051994c75. 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/DEYX82125116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786ceb57d8f24d33f39cd3e2c13ba0c4f85f232342e7918c0e23d9ef2b8b661b. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/DERD72300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc8f162192946f0fe6b794fc5bd8d0407f5393fae2b2906153c0ec1bb237df9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DERD72300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be86fe07d7f7626f8619bf9fdf98fb5e784515bef7d351eba9175463c09e927. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DERD72400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be86fe07d7f7626f8619bf9fdf98fb5e784515bef7d351eba9175463c09e927. 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/DERD72400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4502d084891af559388fd567ee0419c505ce4690759bacf842f48ca7787093. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DERD72400090.
Folge deinem Herzen (ohne den Kopf zu verliern)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565a73bbddc52415acd25f978a149cc242bd4e6bbcf5df9956bafc66014ae511. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DERD72400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214adc3c7e42f712b15dc2c578a10b4489fe2dfbe8d302437d61b42d056bb164. 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/DERD72400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa4b054aa92c9ea3f6f0c257a845a0aace3ed086ff49723444c35b1d6b5d3a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DERD72400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e19f43f8e5ab9f88e8c63fa9710442838057b2e7699fa23b7e3a264a7345627. 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/DERD72400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59e163c6f1771e2d2ec48f38d5eb55b6bff243472a702c9de380dae967edadd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DERD72400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcbfe266bf6f8c85b35893a85676b4b0fdedc38c34fe7db658848f25e35acce. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DERD72400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a526b7cc1dffd299e322f402b42470f5518d07153893437c54bd9b7b8bade. 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/DERD72400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f209246d8c3b486da63e906f443cb448ecf4137a4157c37c98505ca5fc66dc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DERD72400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc3bb33defd293c6551afc3d7228aa2d20e3aa31b2f999f7ea4d62b6c302785. 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/DERD72400098.