thumb|Scylla as a maiden with a kētos tail and dog heads sprouting from her body. Detail from a red-figure bell-crater in the Louvre, 450–425 BC. This form of Scylla was prevalent in ancient depiction
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 0x1f7852549d263796b1c4883da7099d93cf19809e3c1fe6a0f8400e678d26d801. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a835b238-0ece-4463-804e-ecbc93808849.json and https://artists.proofprofile.net/proofs/artist/a835b238-0ece-4463-804e-ecbc93808849.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 0xef3ede60bc39e38e2f518dfd316f3ec507e1f12845d967b38ba35e0eb7a8cae4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11919252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc40c21b9681be813c06df98ff809a40b7110e5390c4e66ed44860ee0582a512. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11919253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b2f8ed1f14204d31b379058f0ddf3b3e2c9eae980479a101022093d73f5b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11919254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d53c4438298812c615440d9def67d68ccd46cf6605c347512d083b3969b053. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11919255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99cd55d6be0258068096c4147078c81f0505e45776c9f26a344b2ae86b0f8d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11919256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa865b7338b7a6388627cce4d2c6fb795c74215ed0978e88bc45486464793f094. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W11919257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf245ac63bb7bc018a45331d971851649a57f2c85e791e5ee61135cfe04611499. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W11919258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d2500fafb1a9467acfa2081bf6a5fafbe2a2dfeebe4a840b48992659a36de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W11919259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8585b9c6662e97bac40e784adb541ff4d2e4b8e7195efb0196a36a8911372917. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11919260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295b1a93cd2726c712ff470524dd75c0601738249a01c17655f6789510d7daa6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W11919261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa7010901cc0957a5ed5ba369b046bb4d69c291eeab2e8168ffcc02d4ddc97c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BER721800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8d3760f543f695be89697450b83c9687413aa85153f2376b28663bbe45cb09. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX851801254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb86b2436318bb17c912be3db728bba2abe47628d061ad8642ab69a7b304c0d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BER721800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d9ff72596c86298bd00500b1b8032b995da068f05824093db51dcc97c5c4ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BER721800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525d35ea77c25a77aebed8067f5491f389ece43d3982294fbc1b8508110fbec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BER721800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55007de742f1447fe5c4c859faed1c222cf9ea842c2c8614c7aff47615de6bb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BER721800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46abf5879535448f6f8a292750218743023d7b038492139376f6fb1d500605a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BER721800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515f32db6c7f3a05e816bdd16f7d0bc10b1f2b0a90e249bbd6927f4b86ec3d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BER721800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be5e69512dc936682d581e937d424646ba6f493918a6b03a08eadf66acd0458. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BER721800019.