Ambio: A Journal of Environment and Society is a monthly peer-reviewed scientific journal published by Springer Science+Business Media on behalf of the Royal Swedish Academy of Sciences. It was establ
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 0x3ccf2f75a4a77dbf194a43e9301fd433e19d1097714d3e9a5cbc1f11b4d5f5d8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/791a1eb7-d4c6-4ecd-9ca1-8e6d805a1883.json and https://artists.proofprofile.net/proofs/artist/791a1eb7-d4c6-4ecd-9ca1-8e6d805a1883.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 0x9698a7bbf51737f646daf0c1763dbb9248de1693ff0222fe7c981f1a6368c480. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAQOI2400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a68e71469c4a067b4babf41b5d923e72edba42eb571a9ea21536fd7eac99933. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:47Z), 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/CAQOI2400536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f86675123e3c755099f31a0e39c5f99579b5661304e1b9c04c56c6334a3ce9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:37Z), 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/CAQOI2400537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8476d2257723b9a39fb598fead71568535d4c9d8d303e55e6eecf40c4ce827. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CAQOI2400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe1820239122f64acfd1229b480a2f09f39b5580d9604897c2f86208425622a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAQOI2400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5694183c89c6d0f4954076d65dcbd8a682c1c7f117dbaf686f5191858535618c. 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/CAQOI2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbc879f085e35ca2905c9d448482a3420d8855dd10ccad5afc1f6ad11bed1b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:07Z), 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/CAQOI2414187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5425b331098349b61b70fa43c9f8479613f9f7832c4bc47560a6712d2ad816af. 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/CAQOI2414189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510a0096289a1fb8df6154dacefaa96e50e79e590df0b18a8714a878e2cdac15. 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/CAQOI2414191.