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 0x54a96a7222644c0c326a3be4e8fec6925c39874eaf47fa9fd310ef3333b381da. 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/be89954b-f925-4a3a-a5be-50411715e465.json and https://artists.proofprofile.net/proofs/artist/be89954b-f925-4a3a-a5be-50411715e465.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 0x7b1d072edef29e6d9a15370ca5f4c951c391913da46f9f8e305d3e071e8e9bd5. 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/CA5KR2422447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c50c6a0500506ab512720f6a2fba07a4b63e3c06a01b72b3e04e76a0fc4281. 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/CA5KR2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5db137e105b5cc751545b783c54908396bc2ed940d2ad04d44a73507bb41056. 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/CA5KR2400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa930997cd0c1ef6be6b52bb4e84c8bdf0493673dd79835ca37dbe0ccbe5ba1. 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/CA5KR2400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b89de6d22bf170c84796e1b203d778d1ba9dc6e8deda926954e4af9a5353dc. 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/CA5KR2400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb03495c67dd323e2c81c8545c3b34c7017f1cbcf88b81a611a358c0865de313. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c243dd513bfca91d27ae687862a0b4462d873b3dfcdc59172923f17d5ac99f3. 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/CA5KR2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb822c2e5c8f99b656c3bdcc66213844580f0ff68d569d98059f4ee52a4f13a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CA5KR2400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e543c6a1a4adae2d5c451743a74dd6e038cab71459531cade00da69943e4a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3d08ce55078dc50c2e70d079c87177a52517d72884fe5840a05d466beefcbd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45668de7cf7739bff605c2ca1ece3ac52148dfc183f5758726e0a4e7ce54bcd. 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/CA5KR2317339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005c4c7d6d7bd5c98ced68e276c2f898d6164c00a888eec90cea5fea9909345. 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/CA5KR2296037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121360058d98718f9127e7c78c7a70d3154e800ed80b70256599284b0174b3de. 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/CA5KR2188103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ddc46c1a93558ffd554832ffa12191aa58e5ffeaefb5748b4648659efd8bff. 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/CA5KR2317340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b839741819063e20358d211c43974a086495d84928999adb2d96a1e9d758fea. 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/CA5KR2152705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2fff5d9e062285757237902789fe54b623923007e977d0a2544ad29a3a2d8e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA5KR2178232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a53f57eedb16033248a07d9e7f366a0d6db2183d3f079c33dc87711976dd76. 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/CA5KR2317341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90b23b9873aeefb2b7460850c820c3474c1d65bf6f3abab74a889d59ed406fd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CA5KR0039032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2806c12731e5e710078f8c3f230f6324157566ec0e0aab2d0712f5264d66a289. 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/CA5KR2317342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005c4c7d6d7bd5c98ced68e276c2f898d6164c00a888eec90cea5fea9909345. 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/CA5KR2296037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90b23b9873aeefb2b7460850c820c3474c1d65bf6f3abab74a889d59ed406fd. 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/CA5KR0039032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121360058d98718f9127e7c78c7a70d3154e800ed80b70256599284b0174b3de. 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/CA5KR2188103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2fff5d9e062285757237902789fe54b623923007e977d0a2544ad29a3a2d8e. 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/CA5KR2178232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b839741819063e20358d211c43974a086495d84928999adb2d96a1e9d758fea. 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/CA5KR2152705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ada8ddef41f1fae4df99fa4b6528a450989debdae56acf5ddff8a5dcc6eb2e. 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/DELJ81951721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09053c9b09a37f66cb92f0041b09a5b4826ffba2e0e951b3a205a82353e41651. 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/DELJ81951722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe140507781a36e253d32e176e2cc3d80a8d94781944887098a093f0234997. 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/DELJ81951723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb80040bed01fbde782a00ae9bc4fb6e7441a68651d91f6e1e83a4f55bdc97. 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/DELJ81951724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeda1b6bbfac05ccf140a47e45d6fee0b4a0dcef53a03d14519a7720f59009b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ021804954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c66f61401b4c69c4d48d7c4a2fbea840293204bde2507b89664c0f6d54fa3f. 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/DELJ81736527.