The euro (symbol: €; currency code: EUR) is the official currency of 21 of the member states of the European Union. This group of states is officially known as the euro area or, more commonly, the eu
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 0xf763fb893716ea0bdb1e9f6f6d2e2f4f5aa514df098b5be515751979692b26b7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bd466fd-c024-47c8-a6a8-40e8a883c64e.json and https://artists.proofprofile.net/proofs/artist/3bd466fd-c024-47c8-a6a8-40e8a883c64e.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 0x9e3ece1123349c428d5c97a92ba93a05cea6af31a55b6ae7c4b79a44f6ec9658. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1268273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a40e8d3c520349a4abd189166a215f66011f8fe8a5ebf1da75d6e0dac9981ef. 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/USUYG1206996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59bbec464ae6161ba8d03165316bb850bab2919deed73fc4f58d8f0f06ff7eb. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:32:46Z), 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/USLD91751769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f3b771e8b81d707b020461cdd3553b47d4e971eae3f06530f2a715ddaefc66. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLD91764496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfb985517ebff7631112cc8e9bb0f316fa48bc6a98a9401b7eed3a8b882a8aa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLD91764499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd88c47f03b8d60a75ddccd9dacf3e720c3d0603833ffc49c274f387f00177. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLD91774612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8ddc31dbe23a379778a79377a99503ef9a4f5ff8e29b5f1d25b7e30f0ad819. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLD91776205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898c2895798727fe32a3f59f6d7c79c351a64d0ea6106bdcfa23013bc7081308. 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/USCM51400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0f223de76635874653cbf88ed2a0a832abca72953dd353e1e21bb468e1673. 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/USCM51400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f9c5709297e80c0dc0ca02c2e4b450824bb63c91a2b97ae13010fa377902f. 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/USUG12307950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d067477252cd7cb0d9b6a32167c56cc33fe5d26b21bd1702822395eae70134. 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/USCM51400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ed881c939a42868cd8d60f22582e87058a898b1a1662186e6d479d7249ae8f. 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/USUYG1434673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f9c5709297e80c0dc0ca02c2e4b450824bb63c91a2b97ae13010fa377902f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUG12307950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eff75f76c1056a724ff3e1d4d26fc6111f119f202dcbdd5e566e360592a0b4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92358561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe039083779bc7c04e6b2837342f8ce204f04665e52184c57db0a028b4fe1f6a8. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZFZ72499001.
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