DeMarco or Dimarcco is a name, originally meaning son of Marco. As a surname Ab DeMarco, Canadian ice hockey player Ab DeMarco Jr., American ice hockey player and Ab DeMarco's son Antonio DeMarco, M
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 0xf4a7e85089828d83dc9404d1a97c814f50a5ff565af0406690c581d5112be3f4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90b4e02f-b49a-40b0-9cbc-747e293ca2d2.json and https://artists.proofprofile.net/proofs/artist/90b4e02f-b49a-40b0-9cbc-747e293ca2d2.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 0xc74d0b0a885a31f74f47c3270c7197fb668645c621b8f185bbcc11774050b9e5. 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/TCABB1188613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24399bf9164b5b3f92a31ac3f90f1fa763a9be5bd8480e9d021fce4eb916f76f. 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/GBRKQ2173472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f8f1170907c306ed1dbb0781f88b6b2e3b48d22b0a2a34622a0b1de1a938b6. 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/USLZJ2170359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7987f20e460d306226e91d480cb16934b65838b6e88df49ea953e65b50eeaf28. 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/USLZJ2122936.
Dance My Stress Away (with Stephen Marley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af19767054358a3689a8da5abc8bdf0ae05776bd94e707555366112c86abc0. 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/GBRKQ2127217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e70479663bdd9df6c760b2d26af982058ff6f30045c9baa0cbde7bb6fb43ba8. 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/QMBZ91926960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534518f91a0680fa2aec4eca0b37b461aea2a426f8eadac9610543d3be2018a6. 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/JMB110900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1790f58c21c83996d7a8541249fdb7088d1da39e244bdd036ba2d004ce83c130. 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/QT2TY2434116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935fe943c1538a7534becf075eabc1d5b142e2f122f63ab9b2ee16aed90a1af2. 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/QZMZ92479253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01dcc9d26949552e0c4e125073e84f43c6622a3ef00b35cd4405fc59210373b. 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/QZGLM2426468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8650532696ba527965b61687d72c004cb6ccc4a7a8f1a5f6b7402dbaca96e653. 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/QZFZ32445019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55f8df032c5fbfde74456d3f809eb5536d2ff9dc99eaf6324774710bde4bf05. 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/QZWDE2310362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d6e7c008e8268c460191781c7efd9cf84b3c42235e3dc900770e08401cf935. 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/QZZ8B2431986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216c115cd16843e6b6215df795c6f6558cb21c1e68bc1f05c4bdeb78f851b86e. 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/QZW9L2427998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84df28830ce73e690d2433b8d8da848f690bd774f6adbc8566aa4d77ed19e57. 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/QMFME2412556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8358ea12351069fe206a19ddc8256e5d18e7f1c943b79250e7bf4b47f26be2ab. 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/QMDA72438447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1ff4a271d572acdef67b8a00934816b445feabdbb6a2bde834e2fda26ad58. 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/QZWFN2458897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aaccbeb43625329f3cb1fceb136b81909c63d936fe66026fb360ca9bea9411. 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/GBUM72005784.