thumb|200px|right|Slon and Sadež Slon in Sadež (English: The Elephant and the Fruit) is a Slovenian musical group, formed in 2001 by Jure Karas (The Elephant) and Igor Bračič (The Fruit). They perform
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 0x3badd2f955da410a051d250cfc54e137ca6b21fceb16fe840b77eb531b40a249. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db33cace-8d18-4b52-81a9-df0dfbe78f19.json and https://artists.proofprofile.net/proofs/artist/db33cace-8d18-4b52-81a9-df0dfbe78f19.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 0x82e3a1a17c9b0cffc3d951fe7f9a6503045c083fb1557e9af73ee460a81af2a9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZNWW2262869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213c04269ed215ae73b251e6e3ac4d929dd9eb1f13a634d828f2ee524ef4bf6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWW2262871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c9c2bcd6452177a630ff4f09389fa04bd5afa6c8b0eeff6d6b51ca77b73bc1. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZNWW2261904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9ee217815275cfaacc948c8bcaeb5e29b6af77ee19a845b435e1f504ad3391. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2261906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8679d1407cdd168ac15c8dc5b52349a357c9782a726e6247b7e9efdfaee49593. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZNWW2261908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafee223febfd58357c2dcde698837b6660beacf82f6d41cc5678f8f9ccd4b77c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWW2261909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf203f86d5f00ea9cb716c5b68a2cc188033e314eeae0414056a451a702f64cf. 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/QZNWW2261911.
Pesmi in skeci iz oddaje Stafeta mladosti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2155e73f9474f30270d94f73fdb341490b43fd56820949cc9c7e4a5b9c36427. 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/SIA631200865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7231c7aafc6de91b77312d74fcf852adf8a359db536a4693147f7c27503640. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZES61979451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecb1f0dea75e716cc84f9b0b6530f57302461bc41d890eed4f94fe917786400. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZES61979452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa234e9a6ac18140de4971b01ea1e191d59dd6d1140ed227b9a5da841216d2a3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES61979454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c43604ac4f60c2e89974ee9c647df2893a57a88868e6607891c8a9d89295cf7. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZES61979456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571d29d0bb4e8f63eb85cf5ecbf22f174ab4c2e82713cbfe9771b010bb6205df. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZES61979460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76e6de544345ba1489a82dd1d7a3a9d35616ae0b97514819951dbc1b7945417. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES61979462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bc76e59c1ce563db9ec1a83981a0ad8010e135f2c7af26e03e337008aa8750. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTB72502331.