Sabrina may refer to: People and fictional characters Sabrina (given name), a feminine given name, including a list of persons and fictional characters with the name Sabrina (actress), a British ac
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 0x76685984aa50ae534f5185439b0764a244b195aed71cc410697de992465b275f. 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/05e883dc-6ea1-46c9-a96c-073b1c966e95.json and https://artists.proofprofile.net/proofs/artist/05e883dc-6ea1-46c9-a96c-073b1c966e95.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 0x5566b24c1ee2b67af9377acb65a88f8baa675c451e982e229fe5f82d30c2f3a7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRX761598468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918f1ccb05f289e809c13686b8d3d0d9036b3edd518528af1ee2db95cbf4670. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FRX761597293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffe9bdceecacf5db49623283edda42ca6053f89111da490362493a8e3f200ff. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX761597295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1808c56c2e7a8a6d31419f1bed1e4fa8d20081668a4f493f29ea343cf7ecf9ac. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/FRX761597296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf896bd0c69217715f5ad3de54287a81cd5ca50b19069cc5cadd6ef447fe1f8c1. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FRX761592549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681b02135b22aa2dafbecd4a223a8448c28b62f2658a5b3d241211465d6da1b. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FRX761592553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f93f0869dd8da4074857a4fcb0af110a2f097fc48a1962dc44bd881e358c4fb. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FRX761592556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6cd52cc766950aba45b706a233ff149fd7599ca0520d522873e80a0162cfb5. 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/FRX761592559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03df3642b84337da83b1322cd841ed34c7a67ef1dc7cb705303db36b260e9b15. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX761592562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef99632037e052ccdbc2a91813eb2f9be858e371eb19a01951893048498006f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR2X41555615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d11fd3f59a6d01e3acc4d1f34bfc1ab190108f031f86384eafd1437730e422. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR59R1837734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89f7a6e4ae44246aa5a11975a59d0ca25d71516dcd49b4e44cd1769710a3602. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R1963764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bf01f5d40ccec223237246fd4239170e20be6b3d767b5bf8bd2dc47324698a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRU652100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5739d64cc9eea6a57fd16562c6047377a73fd4d73477eb9358d39d1480e890. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRU652100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b1891d7f89699c73ed0f29ec63624370bf970ed7098762947d2f646a45c48b. 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/FRU652100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a3f16a3ad04c9d24c95fece7a6e46fd078ada4f684ea173768082b74103c77. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/FRU652100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fc3dc300356e6fa9aac6d20b89e6922b72001bcf76fdb8bdcbf7f7f694e28a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FRU652100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a846c895170ff886214b8faa432daa960000926a4b3e9bdbc39eea6c67f66da. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRU652100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7729486b4c70cf0ff9cbf8c2586dd55a645c7a03bd589c9a6a1ff9164cfb44ba. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FRU652100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa235410118358288da3641ec34f0bdb5d3473a1e8ea767a2c5361ab473b8d668. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FRU652100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1c59c1267567450269b043016f35f64d49092f99a69aa7de11bcce2a226349. 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/FRR848722401.