Cupidon may refer to: Cupid (known as Cupidon in French), a god of classical mythology Cupidon (comics), a Belgian comics series by Malik and Raoul Cauvin Cupidon (1875), a painting by William-Ado
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 0x096c092456dbe2613a415b3ac860646eced0e5091aab1a48545a691325f8949e. 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/25c57d95-89c7-4a2a-93a9-9c6e9299a8e1.json and https://artists.proofprofile.net/proofs/artist/25c57d95-89c7-4a2a-93a9-9c6e9299a8e1.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 0x3c63ef9cf79c78575887a6b48df5a9d6f368d8e292cf09b522a507b84dd44760. 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/CA6E62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc4a5d9e972628df9832ed45dde22e07801349a46321fc65d24186bf2d3a841. 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/CA6E62100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a517c0d78f747748985717257bffd2381b4d76b938b2e4df50d648c14e2fd53. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA6E62100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9bd60b83872daa4cc03202c09a68b1120b7e9462fa64fc2fcd58c6c8d776d4. 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/CA6E62100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa8a98cd8b5a5a25bd2e7513a0a0d96edab75f5a106eec49c2c8ba9e219638. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA6E62100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae9e5e452d0dd4c050461d4e0d69ba9ff43f17eb69f5648462f94a857d3b7c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA6E62100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921870f328913401e5d55bc89e92aebecfdf7bc5f053fbd29bc419f068032bed. 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/CAH682100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e1b055744c1354f2bce5206d0fa306a0ecfe14f92ed3e3f7d6daccb0e428c5. 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/CA6E62000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e1b055744c1354f2bce5206d0fa306a0ecfe14f92ed3e3f7d6daccb0e428c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA6E62000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf176d9d05b6a2561cb0455bb0dc753352611c10b22e84906cecba34cdbe7d14a. 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/DGA052252685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071677cfd2d072da26425b2a8e8ee405796edc959fef3295b2f158df4c2ae701. 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/FRX452231890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc7e2db06e23f5b70485582d0057802a5b53916e4275c42d39c1263a390093b. 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/FRX452381766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7297b29cfd44f44194e68d5eb89ba4f55dbd56baf40ab65e5e0208bf725690cf. 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/FRX452381767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09973e57fa6fc1481bf0067288384a6e98d96d2ec9dd2f335df93122a0a11984. 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/FRX452381768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988589a038b48a7b956cd55b54c61f1ea87cca7f0b097c4f305bf2c5f12797fc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX872234948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3164e665bb40f5665e20e910601d09056c6cc7b57abdf858c51840f8c54b192. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX452381769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f84171f19e109f1e9cf1e9765d3e72bac074383dd2e265f43302bd0d4639aef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452205046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94826f4a98f30154f5de29d12793d095a873b66b73482f80d065c977f4534171. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452381770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23966432d011b550ace5f4d56dc6ccf2a15f7f1526c734586cefed859d12098. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA092224725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89af4ef8f33a97cfc5234ac01975391b5cbbe20aaba56313e807d134008c1193. 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/FRX452381771.